40X-1000X Fluorescence Microscope, Trinocular, Dual Light MH FM03020303

Specifications
Packing List
Suggested Accessories

Instruction Manual
FM0302 Fluorescence Microscope Instruction Manual-English.pdf

Quick Overview
Infinite. Total Magnification: 40-1000X. 10X High Eyepoint Eyepiece. 4X 10X 40X 100X Infinity Plan Achromatic Objective. Standard Coupler: 1X. Eye Tube Angle: 30°. Eyepiece Field of View: Dia. 20mm. XY Stage Travel Distance: 135x85mm. Illumination Type: MH Dual Illuminated Light. Mercury Light. Excitation Filter Type: UV B G V. Input Voltage: AC 110-240V 50/60Hz.
Suggested Applications
Botany , Phytopathology, Chemistry , Biochemistry, Biotechnology, Pharmaceutics, Education & Student , Graduate & Research, Embryology , Genetic Research, In-Vitro Fertilization, Medical & Microbiology , Anatomic Pathology, Bacteriology, Biochemistry, Cell Culture, Fluorescence, Gout & Rheumatology, Hair & Fiber Analysis, Neuropathology, Oncology, Pathology, Toxicology, Virology, Veterinary & Zoology , Ornithology

FM03020303 Trinocular Fluorescence Microscope

Optical System Specifications

Optical System	Infinite
Tube Lens Focal Length	200mm
System Optical Magnification	40-1000X
Expandable System Optical Magnification (Optional Parts Required)	40-1600X
Trinocular Optical Magnification	4-100X
Total Magnification	40-1000X
Standard Eyepiece	10X High Eyepoint Eyepiece
Standard Objective	4X 10X 40X 100X Infinity Plan Achromatic Objective
Standard Coupler	1X
System Field of View	Dia. 0.2-5mm
Expandable System Field of View	Dia. 0.14-5.5mm
System Working Distance	0.17-12.31mm
Expandable System Working Distance	0.17-12.31mm

Compound Trinocular Head

Compound 20/80 True-Trinocular Head
Eye Tube Optical System	Infinite
Eye Tube Type	For Compound Microscope
Eye Tube Adjustment Mode	Siedentopf
Eye Tube Angle	30°
Erect/Inverted Image	Inverted Image
Eye Tube Rotatable	360° Degree Rotatable
Interpupillary Adjustment	50-75mm
Eye Tube Inner Diameter	Dia. 30mm
Eye Tube Diopter Adjustable	Left ±5°, Right Not Adjustable
Eye Tube Size for Scope Body/Carrier	Dia. 44.5x5mm
Image Port Switch Mode	20/80 True-Trinocular
Surface Treatment	Spray Paint
Material	Metal
Color	White
Net Weight	1.03kg (2.27lbs)
Applied Field	For BM0302 Series Microscope

Eyepiece

10X High Eyepoint Eyepiece (Pair Dia. 30/FN20)
Eyepiece Type	Standard Eyepiece
Eyepiece Optical Magnification	10X
Plan Eyepiece	Plan Eyepiece
Eyepiece Size for Eye Tube	Dia. 30mm
Eyepiece Field of View	Dia. 20mm
Eyepoint Type	High Eyepoint Eyepiece
Surface Treatment	Electroplating Black
Material	Metal
Color	Black
Net Weight	0.12kg (0.26lbs)

Biological Objective

4X Infinity Plan Achromatic Objective
Objective Optical System	Infinite
Objective Optical Magnification	4X
Objective Type	Plan Achromatic Objective
Objective Parfocal Distance	45mm
Objective Focal Length	50mm
Objective for Focal Length	200mm
Objective Working Distance	12.31mm
Numerical Aperture (N.A.)	N.A. 0.13
Objective Resolution	3.35μm
Objective Cover Glass Thickness	0.17
Objective Immersion Media	Dry Objective
Objective Screw Thread	RMS Standard (4/5 in. x1/36 in. )
Objective Outer Diameter	Dia. 19mm
Surface Treatment	Polished Chrome
Material	Metal
Color	Silver
Net Weight	0.06kg (0.13lbs)
Applied Field	PH0302, BM0302, FM0302 Series Microscope
10X Infinity Plan Achromatic Objective
Objective Optical System	Infinite
Objective Optical Magnification	10X
Objective Type	Plan Achromatic Objective
Objective Parfocal Distance	45mm
Objective Focal Length	20mm
Objective for Focal Length	200mm
Objective Working Distance	5.03mm
Numerical Aperture (N.A.)	N.A. 0.25
Objective Resolution	1.34μm
Objective Cover Glass Thickness	0.17
Objective Immersion Media	Dry Objective
Objective Screw Thread	RMS Standard (4/5 in. x1/36 in. )
Objective Outer Diameter	Dia. 20.5mm
Surface Treatment	Polished Chrome
Material	Metal
Color	Silver
Net Weight	0.07kg (0.15lbs)
Applied Field	PH0302, BM0302, FM0302 Series Microscope
40X Infinity Plan Achromatic Objective
Objective Optical System	Infinite
Objective Optical Magnification	40X
Objective Type	Plan Achromatic Objective
Objective Parfocal Distance	45mm
Objective Focal Length	5mm
Objective for Focal Length	200mm
Objective Working Distance	0.72mm
Numerical Aperture (N.A.)	N.A. 0.65
Objective Resolution	0.52μm
Objective Cover Glass Thickness	0.17
Objective Immersion Media	Dry Objective
Spring Mounted Objective	Spring Mounted objective
Objective Screw Thread	RMS Standard (4/5 in. x1/36 in. )
Objective Outer Diameter	Dia. 21mm
Surface Treatment	Polished Chrome
Material	Metal
Color	Silver
Net Weight	0.08kg (0.18lbs)
Applied Field	PH0302, BM0302, FM0302 Series Microscope
100X Infinity Plan Achromatic Objective
Objective Optical System	Infinite
Objective Optical Magnification	100X
Objective Type	Plan Achromatic Objective
Objective Parfocal Distance	45mm
Objective Focal Length	2mm
Objective for Focal Length	200mm
Objective Working Distance	0.17mm
Numerical Aperture (N.A.)	N.A. 1.25
Objective Resolution	0.27μm
Objective Cover Glass Thickness	0.17
Objective Immersion Media	Oil Immersion Objective
Spring Mounted Objective	Spring Mounted objective
Objective Screw Thread	RMS Standard (4/5 in. x1/36 in. )
Objective Outer Diameter	Dia. 21mm
Surface Treatment	Polished Chrome
Material	Metal
Color	Silver
Net Weight	0.08kg (0.18lbs)
Applied Field	PH0302, BM0302, FM0302 Series Microscope

Nosepiece

Inward/Outward Nosepiece	Nosepiece Inward
Number of Holes on Nosepiece	Quintuple (5) Holes
Nosepiece Switch Mode	Manual
Nosepiece Screw Thread for Objective	RMS Standard (4/5 in. x1/36 in. )

Microscope Stand

Stand Height	300mm
Base Type	Illumination Base
Base Shape	Triangle
Base Dimensions	280x185x65mm
Microscope Handle	Yes
Focus Mode	Manual
Coarse/Fine Focus Type	Coaxial Coarse/Fine Focus
Focus Distance	20mm
Fine Focus Travel Distance	Same as Focus Distance
Coarse Focus Distance per Rotation	20mm
Fine Focus Distance per Rotation	0.1mm
Fine Focus Minimum Scale	1μm
Focus Limited	Limited
Focusing Knob Tightness Adjustable	Tightness Adjustable

Microscope Stage

XY Stage Travel Distance	135x85mm
XY-Axis Drive Mode	Manual
Stage Platform Dimensions	155x135mm
Stage Backlight Window Size	29x80mm
Stage Scale	X: -0.2-88mm Y: -0.2-65mm
Opening Size of Stage Specimen Holder	Opening 0-90mm

Microscope Illuminator

Illumination Type	MH Dual Illuminated Light
Top Illumination Type	Mercury Light
Bottom Illumination Type	Mercury Light
Aperture Diaphragm Mounting Position	Vertical Illuminator
Field Diaphragm Mounting Position	Vertical Illuminator
Field Diaphragm Outer Diameter	Dia. 71.5mm
Number of Filter Slots	1
Filter Switch Type	Embedded Type

Condenser

Condenser Type	Abbe Condenser
Condenser Mount Size	Dia. 45mm
Dry/Oil Type	Dry
Applicable Range of Objective	4-100X
Condenser Adjustable	Adjustable
Condenser Max. Numerical Aperture	N.A. 1.25
Condenser Mounting Flange Size	Fastening Screw
Condenser Base Travel Distance on Z-Axis	20mm
Surface Treatment	Electroplating Black
Material	Metal
Color	Black
Net Weight	0.10kg (0.22lbs)
Applied Field	For BM0301, PH0302, BM0302, MT0302, FM0302 Series Microscope

EPI-Fluorescence Kit

Fluorescence Lamp House Light Source Type	Mercury Light
Fluorescence Lamp House Input Voltage	DC 20V
Fluorescence Lamp House Output Power	100W
Excitation Filter Mount Size	Dia. 45mm
Fluorescence Lamp Center	Adjustable
Fluorescence Vertical Illuminator Mount Size	Dia. 45mm
Excitation Filter Type	UV B G V
Number of Excitation Filters	4
Exciting Filter Cube	4 Pieces
Excitation Filter Switch Type	Built-in Filter Block Turret
Power Box Panel Meter Display	Digital Panel Meter
Power Box Cooling System	Fan Cooling system
Output Power	100W
Input Voltage	AC 110-240V 50/60Hz
Power Cord Connector Type	USA 3 Pins
Power Cable Length	1.8m
Surface Treatment	Spray Paint
Material	Metal
Color	White
Net Weight	2.34kg (5.16lbs)
Applied Field	FM0302 Series Microscope

Color Filter

38mm Filter (Blue)
Filter Color	Blue
Filter Size	Dia. 38mm
Filter Switch Type	Embedded Type
Material	Glass
Net Weight	0.004kg (0.009lbs)
Applied Field	For PH0302, BM0302, MT0302 Series Microscope

Bulb

Bulb Rated Power	20W
Bulb Rated Voltage	DC 6V
Bulb Outer Diameter	Dia. 4mm
Bulb Mounting Mode	Bi-Pin
Light Bulb Pin Standard	G4 (4mm)

Mercury Bulb

20V 100W Mercury Bulb
Bulb Rated Power	100W
Bulb Rated Voltage	DC 20V
Bulb Shape	Pipe Shape
Bulb Mounting Mode	Locking Screw
Material	Glass
Net Weight	0.01kg (0.02lbs)
Applied Field	For FM03030303 Trinocular Inverted Fluorescence Microscope and FM03020203 Binocular Fluorescence Microscope

Coupler/C-mount Adapter

1X Coupler
Coupler Mount Type for Trinocular	Fastening Screw
Coupler Mount Size for Trinocular	Dia. 36mm
Adjustable Coupler	Adjustable
Coupler for Microscope Type	Compound Compatible
Coupler Magnification	1X
For Camera Sensor Size	Under 2/3 in.
C/CS-Mount Coupler	C-Mount
Surface Treatment	Electroplating Black
Material	Aluminum
Color	Black
Net Weight	0.13kg (0.29lbs)
Applied Field	For BM0301, PH0302, PL0302, BM0302, MT0302, PL0302, FM0302, BM0303, FM0303, MT0303 Series Microscope

Power Supply

Output Power	55W
Input Voltage	AC 110-240V 50/60Hz
Output Voltage	DC 1.5-6V
Power Cord Connector Type	USA 3 Pins
Power Cable Length	1.5m

Fuse

3.15A Fuse
Fusing Current	3.15A/250V
Fuse Type	Glass Tube Fuse (Fast Acting)
Fuse Size	5x20
Fuse Standard	GB
Material	Glass
Color	Silver
Net Weight	0.002kg (0.004lbs)

Sneeze Guard

UV-free Front Light Baffle
Mounting Holes Position	80mm
Mounting Hole Dimensions	M3
Sneeze Guard Type	UV-free Front Light Baffle
Sneeze Guard Dimensions	150x100mm
Material	Plastic
Color	Orange
Net Weight	0.05kg (0.11lbs)
Applied Field	FM0302 Series Microscope

Environment Requirement

Operating Temperature	5~40℃ (41~104℉)
Operating Humidity	80%

Other Parameters

Surface Treatment	Spray Paint
Material	Metal
Color	White
Net Weight	16.02kg (35.32lbs)
Dimensions	245x275x405.5mm (9.646x10.827x15.965 in. )

Series

FM0302

FM03020303

Technical Info

Instructions

Fluorescence MicroscopeClose Λ

A fluorescence microscope is a microscope that uses ultraviolet light as a light source to illuminate an object to be observed to make it emit fluorescence, and able to observe information on the position, shape, and structure of the fluorescent portion of the object.
Some substances in nature can fluoresce themselves when exposed to ultraviolet light. Some substances cannot fluoresce themselves, but they can also fluoresce after being dyed with fluorescent materials. Fluorescence microscope is an important tool for studying cytology. It is widely used in scientific research and teaching fields such as medicine, polymer structure, and luminescent materials research, and so on.

The most important feature of the fluorescence microscope is that it has an illumination source that can emit ultraviolet light, forming a lighting system with the configured fluorescence condenser and filters that are designed for excitation and acceptance of fluorescence.
Fluorescent light sources generally use mercury or metal halide lamps, as well as high-power LEDs or laser sources. The ultraviolet light emitted by the light source has a shorter wavelength and thus has a higher resolution. Generally, the high-pressure mercury lamp has a continuous spectrum and a large irradiation intensity, making it a relatively ideal fluorescent microscope source; the xenon lamp has stable intensity in the visible light spectrum range and higher intensity in the infrared band than the mercury lamp, but has certain defects in the ultraviolet band. High-power LED light source cannot provide continuous band spectrum, but has advantages in the range of specific wavelengths, there is no need to preheat, start up and use, has long service life and low labor maintenance cost. So when choosing a light source, you need to understand the characteristics of the light source to match the specific application. Halogen lamps have a narrower range of excitation light wavelengths and can only be concentrated in certain specific wavelengths, such as blue light, so applications are less.

Fluorescence microscope can use transmitted light and reflection light for illumination. It can also be installed with a dark field device to become a dark field fluorescence microscope. A phase contrast accessory can be added to form a phase contrast fluorescent microscope, or an interference device can be added to become a fluorescent interference microscope.
Reflection light is also commonly called incidence light fluorescence microscope, also known as the EPI-Fluorescence Microscope. The illumination source and the excitation light are passed through the same objective lens. The excitation light path does not pass through the slide as it is directly irradiated onto the specimen, with small excitation light loss and high fluorescence efficiency.
The illumination path of the transmitted light fluorescence microscope needs to pass through the slide. In order to reduce the loss of the excitation light, the transmissive fluorescence microscope should use quartz glass slides and coverslips. Because, as consumables, quartz slides are expensive, people prefer to use an EPI-fluorescence microscope.
The inverted fluorescence microscope is composed of fluorescent accessories and an inverted microscope. The objective lens and the condenser have a long working distance, and can directly observe and study the object in the culture dish, characterized by microscopic observation in a culture flask or petri dish, mainly used for fluorescence of living tissues such as cells, and are suitable for microscopic observation of tissue culture, in vitro cell culture, plankton, food inspection, etc. in the fields of biology and medicine.

Fluorescence microscope systems require the use of two sets of filters for both excitation and emission (Emission) processes.
1. Excitation: After the light source emits light, it first enters the incident light filter, filters out the visible light, and only retains the wavelength portion for exciting the sample, therefore the incident light filter is called an exciter filter.
2. Then, the excitation light is directed vertically to the objective lens through the dichroic lens or a reflector, and then to the specimen through the objective lens, so that the specimen is excited to generate fluorescence and, at this point, the objective lens directly functions as a condenser.
3. The fluorescence, after excitation, is reflected back through the objective lens to the dichroic lens and the barrier filter to block other light except the wavelength of the emitted light from the sample (i.e., the fluorescent portion), so that the observer observes through the eyepiece or the camera to form image. The barrier filter can also filter out the ultraviolet rays between the eyepiece and the objective lens to protect the observer's eyes.

The reflective layer on the reflector of fluorescent microscopes is generally aluminized. Aluminum absorbs less ultraviolet and visible light in the blue-violet region and reflects more than 90%, while silver reflects only 70%.

The condenser of the fluorescence microscope is made of quartz glass or glass that can transmit ultraviolet light. It can use bright field condensers and dark field condenser, and there is also the phase contrast fluorescent condensers. The bright field condenser has strong condensing power, convenient to use, and is suitable for low and medium multiple power observation. The dark field condenser can produce a dark background because the excitation light does not directly enter the objective lens, thereby enhancing the brightness and contrast of the fluorescent image, capable of observing the fluorescent fine particles that cannot be distinguished by the bright field. The phase contrast fluorescent condenser needs to be used together with the phase contrast accessories and the phase contrast objective lens to observe the phase contrast and the fluorescence effect at the same time. It can see both the fluorescence image and the phase difference image, which helps the accurate positioning of the fluorescent structure.

Ordinary fluorescence microscopes can adopt various kinds of conventional objective lenses. As the more the number of lenses of the objective lens, the greater the loss of fluorescence, and in particular, the apochromatic objective lens contains quartz and other components, which can spontaneously fluoresce to form interference, therefore, the general use of flat field achromatic objective lens can already achieve very good results. The fluorescence brightness in the field of view of the microscope is proportional to the square of the numerical aperture of the objective lens, and inversely proportional to the magnification. For specimens with insufficient fluorescence, in order to improve the brightness of the fluorescence image, an objective lens with a large numerical aperture should be used, especially when using high power microscope for observation, it is often necessary to use a dedicated high-magnification fluorescent objective to provide excellent chromatic aberration correction and image quality.

Fluorescence Microscope Camera and Image
A fluorescence microscope camera can be connected to a fluorescence microscope to form a fluorescence microscope imaging system. The fluorescence image seen by the fluorescence microscope has both the morphological features, the fluorescent color and brightness and other features, and the two need to be combined for comprehensive judgment.
The brightness of the fluorescence is relatively weak, and it usually requires the camera to have high sensitivity to low light and signal capture ability in order to obtain a good fluorescence image. The camera can adjust the focus with a brighter fluorescent area. Adjust and set the exposure compensation according to the distribution ratio of the fluorescent image in the photometric area and the brightness of the image. Generally, it is necessary to increase the exposure compensation appropriately to obtain a bright and vivid fluorescent image on a dark background. The camera needs to adopt the appropriate fluorescence shooting mode, do the appropriate background subtraction processing, and set the appropriate parameters, such as Binning, Gain, Gamma, etc., so that the exposure time and gain can be maximized by software control.
Fluorescence microscope can also use a fluorescent cold-cooling camera to reduce noise and improve the signal-to-noise ratio of the image. Especially in low light conditions, using dark field illumination, or under chemiluminescence conditions, long time exposure is required. Using a cooling camera can reduce the dark current noise and obtain a clearer image.
In the weaker fluorescence field of view, in order to obtain a better contrast image, appropriate adjustments should be made to reduce the fluorescence aperture diaphragm so as to obtain images with large depth of field, or use a neutral density filter (ND for short).
When shooting with a high power or magnification objective, any vibration should be avoided, and it is best that an anti-vibration table should be configured.

The slides and coverslips used in fluorescence microscope must have a smooth surface, uniform thickness, and no autofluorescence. The thickness of the slide should be between 0.8~1.2mm. The thickness of the standard coverslip is about 0.17mm. If the slide is too thick, it will cause short-wave excitation light and fluorescence loss. If necessary, quartz glass slides can be used to increase the fluorescence transmittance.
The tissue section or other specimen of the fluorescent specimen is usually about ≤10μm, should not be too thick, otherwise it will affect the excitation light penetrating the specimen, and excessive non-essential cell overlap or impurity masking will affect the observation effect of the objective lens on the upper part of the specimen.
The sealant of the specimen must be colorless and transparent, without autofluorescence. The brightness of the fluorescence is brighter at pH 8.5~9.5, and it is not easy to fade quickly. Usually, glycerin can be used. When using dark-field fluorescence microscope or oil lens for observation, lens oil must be used, and it is best to use special non-fluorescent oil. Especially in the U and V-band excitation, the conventional cedar oil will have cyan fluorescence. Glycerin, liquid paraffin, etc. may also be used.

Fluorescence Microscope Operation Precautions
As the fluorescence is relatively dark, so the fluorescence microscope is best placed in a dark room, which also allows the human eye to adapt to the darkness for better observation effect. When lighting required, local lighting can be used. In addition, because some mercury lamps produce a great deal of heat, and some xenon lamps can generate a lot of ozone, and therefore good ventilation is required.

Before use, open the packing list first, check the integrity and status of the parts and accessories, and operate according to the instructions.
Before performing fluorescence observation, first check the condition of the lighting equipment of the fluorescent device, turn on the halogen light for illumination first, place a sample film, and do the lens focusing and centering the filament in advance. Then, check whether the fluorescence excitation filter and the emission filter are installed in the nosepiece, and whether the objective lens configuration is proper. If there is a phase contrast observation of transmitted light in the system, check the convergence axis of the condenser lens in advance, and whether the phase contrast ring plate and objective lens are matched correspondingly.
Inspect the slides, coverslips, and other sample vessels, whether the thickness of the sample is within the range of the calibrated working distance of the objective lens, and whether there are liquid, smudges, dust and other interference.
Because the illumination source contains ultraviolet light, avoid looking directly at the ultraviolet light source when the light source is adjusted. The fluorescence microscope should be equipped with a brown UV protection visor to prevent UV damage to the retina of the eyes.

After the above inspection, place the specimen to be tested and turn on the high-pressure lamp source. When the high-pressure mercury lamp is fully lit, stop the excitation and then observe.
Generally, after the high-pressure mercury lamp is turned on, the excitation light intensity tends to be stable in about 5-10 minutes, and reaches the brightest point in 15 minutes. The working time when the mercury lamp is turned on is preferably 1 hour each time. Exceeding 90 minutes, the excitation light intensity will gradually decrease and the fluorescence will be weakened. After 15 minutes of excitation of the specimen, the fluorescence will also be significantly attenuated.
After the high-pressure mercury lamp is turned off, it cannot be re-opened immediately. I can be started again only after it is completely cooled. Otherwise, the mercury lamp will be unstable and affect the service life.
After the mercury lamp is turned off, it takes at least 10 minutes to start again, so that the mercury vapor is cooled to the original state, otherwise the service life of the bulb will be affected.
The power supply should be equipped with a voltage regulator, which will reduce the service life if the voltage is unstable.
The excitation device of the fluorescence microscope and the high-pressure mercury lamp have a limited life span, and the specimens should be collectively inspected in batches so as to reduce the number and time of mercury lamp activation.

First, observe with a low power objective lens, ensure that the specimen is located in the center of the entire illumination spot, and then gradually changed to high power observation. Under the premise of not affecting the resolution, the adjustment ring of the field diaphragm and of the numerical aperture diaphragm of the objective lens can be minimized as much as possible to reduce the excitation area, avoid the influence of stray light, and improve the depth of field.
When observing the sample, in order to prevent the fluorescence of the sample from quenching due to excessive excitation of light illumination during the process of focusing and searching for the image, it is best to adjust the excitation light to a moderate intensity by first reducing the aperture diaphragm or using the ND filter. After finding the key feature points, adjust the fluorescence to the optimal brightness, and finally observe and take pictures.

Long-time excitation light illumination of the specimen will cause the fluorescence to attenuate and disappear. Therefore, the specimen should be observed immediately after dying. If stored for too long, the fluorescence will gradually weaken until quenching. When not observed for a while, the excitation light path should be blocked by a visor. The dyed specimens can be wrapped in black paper, placed in a polyethylene plastic bag, and stored at a low temperature of about 4 °C, which can delay the quenching time of the fluorescence and prevent the sealing agent from evaporating.
Before and after use, the grease and dust contaminating the lenses in front of the objective lens should be inspected and removed. Gently brush it with a soft brush. In the place where fingerprints and oil stains are present, use a soft, clean absorbent cotton, lens rubbing paper dipped in anhydrous ethanol (or methanol) to gently wipe clean, and wipe the oil stain on the surface of the objective lens with gasoline

For more information on the use of fluorescence microscope, please refer to the Biological Microscope on the BoliOptics website.

InfiniteClose Λ

Microscopes and components have two types of optical path design structures.
One type is finite optical structural design, in which light passing through the objective lens is directed at the intermediate image plane (located in the front focal plane of the eyepiece) and converges at that point. The finite structure is an integrated design, with a compact structure, and it is a kind of economical microscope.
Another type is infinite optical structural design, in which the light between the tube lens after passing the objective lens becomes "parallel light". Within this distance, various kinds of optical components necessary such as beam splitters or optical filters call be added, and at the same time, this kind of design has better imaging results. As the design is modular, it is also called modular microscope. The modular structure facilitates the addition of different imaging and lighting accessories in the middle of the system as required.
The main components of infinite and finite, especially objective lens, are usually not interchangeable for use, and even if they can be imaged, the image quality will also have some defects.

The separative two-objective lens structure of the dual-light path of stereo microscope (SZ/FS microscope) is also known as Greenough.
Parallel optical microscope uses a parallel structure (PZ microscope), which is different from the separative two-object lens structure, and because its objective lens is one and the same, it is therefore also known as the CMO common main objective.

Tube Lens Focal LengthClose Λ

The tube lens focal length is the focal length from the tube lens to the intermediate image plane of the design of infinite microscope, and its typical ranging is from 160 to 200 mm, depending on different manufacturers.

System Optical MagnificationClose Λ

The magnification of the objective lens refers to the lateral magnification, it is the ratio of the image to the real size after the original image is magnified by the instrument. This multiple refers to the length or width of the magnified object.
System optical magnification is the product of the eyepiece and the objective lens (objective lens zoom set) of the optical imaging part within the system.
Optical magnification = eyepiece multiple X objective lens/objective lens set

The maximum optical magnification of the microscope depends on the wavelength of the light to which the object is illuminated. The size of the object that can be observed must be greater than the wavelength of the light. Otherwise, the light cannot be reflected or transmitted, or recognized by the human eye. The shortest wavelength of ultraviolet light is 0.2 microns, so the resolution of the optical microscope in the visible range does not exceed 0.2 microns, or 200 nanometers. This size is converted to the magnification of the microscope, and it is the optical magnification of 2000X. Usually, the compound microscope can achieve 100X objective lens, the eyepiece is 20X, and the magnification can reach 2000X. If it is bigger, it will be called "invalid magnification", that is, the image is large, but the resolution is no longer increased, and no more details and information can be seen.

Trinocular Optical MagnificationClose Λ

When the instrument is conducting electronic image magnification and observation through a camera or the like, the optically magnified portion may not be the optical path that passes through the "eyepiece-objective lens" of the instrument, at this time, the calculation method of the magnification is related to the third-party photo eyepiece passed.
The trinocular optical magnification is equal to the multiplier product of objective lens (objective lens set) and the photo eyepiece

Trinocular optical magnification = objective lens X photo eyepiece

Total MagnificationClose Λ

Total magnification is the magnification of the observed object finally obtained by the instrument. This magnification is often the product of the optical magnification and the electronic magnification.
When it is only optically magnified, the total magnification will be the optical magnification.

Total magnification = optical magnification X electronic magnification
Total magnification = (objective X photo eyepiece) X (display size / camera sensor target )

System Field of ViewClose Λ

Field of View, is also called FOV.
The field of view, or FOV, refers to the size of the object plane (i.e., the plane of the point of the observed object perpendicular to the optical axis), or of its conjugate plane (i.e., object to primary image distance), represented by a line value.
System field of view is the size of the actual diameter of the image of the terminal display device of the instrument, such as the size of the image in the eyepiece or in the display.

Field of view number refers to the diameter of the field diaphragm of the objective lens, or the diameter of the image plane formed by the field diaphragm.
Field of view number of objective lens = field of view number of eyepiece / (objective magnification / mechanical tube length)

Large field of view makes it easy to observe the full view and more range of the observed object, but the field of view (FOV) is inversely proportional to the magnification and inversely proportional to the resolution, that is, the larger the field of view, the smaller the magnification, and also the lower the resolution of the object to be observed.
There are usually two ways to increase the field of view, one is to replace with an objective lens of a smaller multiple, or to replace with an eyepiece of a smaller multiple.

System Working DistanceClose Λ

Working distance, also referred to as WD, is usually the vertical distance from the foremost surface end of the objective lens of the microscope to the surface of the observed object.
When the working distance or WD is large, the space between the objective lens and the object to be observed is also large, which can facilitate operation and the use of corresponding lighting conditions.
In general, system working distance is the working distance of the objective lens. When some other equipment, such as a light source etc., is used below the objective lens, the working distance (i.e., space) will become smaller.

Working distance or WD is related to the design of the working distance of the objective lens. Generally speaking, the bigger the magnification of the objective lens, the smaller the working distance. Conversely, the smaller the magnification of the objective lens, the greater the working distance.
When it is necessary to change the working distance requirement, it can be realized by changing the magnification of the objective lens.

SiedentopfClose Λ

For siedentopf eyetube, when changing the interpupillary distance, it requires two hands pushing or pulling the two eyetubes left and right simultaneously, and the two eyepiece tubes or eyetubes will change their position at the same time.

Eye Tube AngleClose Λ

Usually the Microscope Eyetube is 45°, some is 30°, Tiltable Eyetube Angle design of a microscope is also known as the ergonomics microscope.
0-30° or 0-45° is an ergonomic design. When the mechanical tube length / focal length of the tube of the microscope is relatively big, the microscope is relatively high, and the user's height or the seat of the work desk is not suitable, long-term use of microscope may cause sitting discomfort.
Eyepiece tube with variable angle can freely adjust the angle without lowering the head. Especially when it is close to 0 degree and the human eye is close to horizontal viewing, long-time or long-term use can avoid fatigue damage to the cervical vertebra.

Erect/Inverted ImageClose Λ

After imaging through a set of objective lenses, the object observed and the image seen by the human eye is inverted. When the observed object is manipulated, move the specimen or object, the image will move in the opposite direction in the field of view. Most of the biological microscopes are reversed-phase designs.
When needing to operate works with accurate direction, it is necessary to design it into a forward microscope. Generally stereo microscopes and metallurgical microscopes are all of erect image design.
When observing through the camera and display, the erect and inverted image can be changed by the orientation of the camera.

360° Degree RotatableClose Λ

The eyepiece of the microscope can have different viewing or observing directions. When the position of the microscope is uncomfortable, the direction of the eyepiece tube of the microscope can be adjusted, to facilitate observation and operation.

Placement method of different viewing angles of the microscope:
General direction: the support column is behind the object to be observed
Reverse direction: the support column is in front of the object to be observed
Lateral direction: the support column is on the side of the object to be observed
Rotating eyepiece tube, different microscopes may have different methods, for some, the direction is confirmed when installing the eyepiece tube of the microscope, for some, by rotating the body of the microscope, and for some, by rotating the support member on the support or holder of the microscope.

Interpupillary AdjustmentClose Λ

The distance between the two pupils of the human eye is different. When the image of exit pupil of the two eyepieces of the microscope are not aligned with the entry pupil of the eye, the two eyes will see different images, which can cause discomfort.
Adjust the distance between the two eyepieces, to accommodate or adapt to the pupil distance of the observer's eyes. The adjustment range is generally between 55-75mm.

Eye Tube Diopter AdjustableClose Λ

For most people, their two eyes, the left and the right, have different vision; for the eyepiece tube, the eyepoint height of the eyepiece can be adjusted to compensate for the difference in vision between the two eyes, so that the imaging in the two eyes is clear and consistent.
The range of adjustment of the eyepiece tube is generally diopter plus or minus 5 degrees, and the maximum differential value between the two eyepieces can reach 10 degrees.

Monocular adjustable and binocular adjustable: some microscopes have one eyepiece tube adjustable, and some have two eyepiece tubes adjustable. First, adjust one eyepiece tube to the 0 degree position, adjust the microscope focusing knob, and find the clear image of this eyepiece (when the monocular adjustable is used, first adjust the focusing knob to make this eyepiece image clear), then adjust the image of another eyepiece tube (do not adjust the focusing knob again at this time), repeatedly adjust to find the clear position, then the two images are clear at the same time. For this particular user, do not adjust this device anymore in the future.
As some microscopes do not have the vision adjustment mechanism for the eyepiece tube, the vision of the two eyes are adjusted through the eyepiece adjustable.

Image Port Switch ModeClose Λ

The third eyepiece splitting in the trinocular microscope is to borrow one of the two sets of eyepiece optical paths as the photographic light path. The beam split prism or beam splitter can reflect part of the image light to the eyepiece, and part passes through to the third eyepiece photographic light path, such a trinocular microscope is called trinocular simultaneous imaging microscope, or true-trinocular.
The beam split prism or beam splitter of the trinocular simultaneous imaging microscope or true-trinocular often has different splitting modes, such as 20/80 and 50/50, etc. Usually, the former is the luminous flux ratio of the eyepiece optical path, and the latter is the luminous flux ratio of the photographic optical path.

The advantage of true-trinocular is that, the real three optical paths can be imaged at the same time, and are not affected by the simultaneous use of the eyepiece observation and the photographic optical path (display). The disadvantage is that, because of the reason of the splitting, the image light of the photography is only a part. In theory, the image effect will be affected, and the effect is more obvious in the binocular eyepiece observation. If viewed closely, one will find that the eyepiece of the light path is relatively dark. However, in the current optical design and materials, the impact on the actual work is not very big, especially in the observation of low magnification objective lens, it has basically no effect at all, and therefore used by many people.

Eyepiece Optical MagnificationClose Λ

Eyepiece optical magnification is the visual magnification of the virtual image after initial imaging through the eyepiece. When the human eye observes through the eyepiece, the ratio of the tangent of the angle of view of the image and the tangent of the angle of view of the human eye when viewing or observing the object directly at the reference viewing distance is usually calculated according to 250 mm/focal length of eyepiece.
The standard configuration of a general microscope is a 10X eyepiece.
Usually, the magnification of the eyepiece of compound microscope is 5X, 8X, 10X, 12.5X, 16X, 20X.
As stereo microscope has a low total magnification, its eyepiece magnification generally does not use 5X, but can achieve 25X, 30X and other much bigger magnification.

Eyepiece Field of ViewClose Λ

The eyepiece field of view is the diameter of the field diaphragm of the eyepiece, or the diameter of the image plane of the field diaphragm imaged by the field diaphragm.
The diameter of a large field of view can increase the viewing range, and see more detail in the field of view. However, if the field of view is too large, the spherical aberration and distortion around the eyepiece will increase, and the stray light around the field of view will affect the imaging effect.

Eyepoint TypeClose Λ

Eye point refers to the axial distance between the upper end of the metal frame of the eyepiece and the exit of pupil.
The exit of pupil distance of high eyepoint eyepiece is farther than that of the eye lens of the ordinary eyepiece. When this distance is greater than or equal to 18mm, it is a high eyepoint eyepiece. When observing, one does not need to be too close to the eyepiece lens, making it comfort to observe, and it can also be viewed with glasses. Generally, there is a glasses logo on the eyepiece, indicating that it is a high eyepoint eyepiece.

Objective Optical MagnificationClose Λ

The finite objective is the lateral magnification of the primary image formed by the objective at a prescribed distance.

Infinite objective is the lateral magnification of the real image produced by the combination of the objective and the tube lens.
Infinite objective magnification = tube lens focal length (mm) / objective focal length (mm)

Lateral magnification of the image, that is, the ratio of the size of the image to the size of the object.
The larger the magnification of the objective, the higher the resolution, the smaller the corresponding field of view, and the shorter the working distance.

Objective TypeClose Λ

In the case of polychromatic light imaging, the aberration caused by the light of different wavelengths becomes chromatic aberration. Achromatic aberration is to correct the axial chromatic aberration to the two line spectra (C line, F line); apochromatic aberration is to correct the three line spectra (C line, D line, F line).
The objective is designed according to the achromaticity and the flatness of the field of view. It can be divided into the following categories.

Achromatic objective: achromatic objective has corrected the chromatic aberration, spherical aberration, and comatic aberration. The chromatic portion of the achromatic objective has corrected only red and green, so when using achromatic objective, yellow-green filters are often used to reduce aberrations. The aberration of the achromatic objective in the center of the field of view is basically corrected, and as its structure is simple, the cost is low, it is commonly used in a microscope.

Semi-plan achromatic objective: in addition to meeting the requirements of achromatic objective, the curvature of field and astigmatism of the objective should also be properly corrected.
Plan achromatic objective: in addition to meeting the requirements of achromatic objectives, the curvature of field and astigmatism of the objective should also be well corrected. The plan objective provides a very good correction of the image plane curvature in the field of view of the objective, making the entire field of view smooth and easy to observe, especially in measurement it has achieved a more accurate effect.

Plan semi-apochromatic objective: in addition to meeting the requirements of plan achromatic objective, it is necessary to well correct the secondary spectrum of the objective (the axial chromatic aberration of the C line and the F line).
Plan apochromatic objective: in addition to meeting the requirements of plan achromatic objective, it is necessary to very well correct the tertiary spectrum of the objective (the axial chromatic aberration of the C line, the D line and the F line) and spherochromatic aberration. The apochromatic aberration has corrected the chromatic aberration in the range of red, green and purple (basically the entire visible light), and there is basically no limitation on the imaging effect of the light source. Generally, the apochromatic aberration is used in a high magnification objective.

Objective Parfocal DistanceClose Λ

Objective parfocal distance refers to the imaging distance between the objective shoulder and the uncovered object surface (referred to as the “object distance). It conforms to the microscope design, usually 45mm.
The objective of different magnifications of the compound microscope has different lengths; when the distance between the objective shoulder and the object distance is the same, the focal length may not be adjusted when converting to objectives of different magnifications.

Objective for Focal LengthClose Λ

Objective for focal length is a design parameter of the tube focal length of the microscope that the objective is suitable for.

Objective Working DistanceClose Λ

The objective working distance is the vertical distance from the foremost surface end of the objective of the microscope to the object surface to be observed.
Generally, the greater the magnification, the higher the resolution of the objective, and the smaller the working distance, the smaller the field of view. Conversely, the smaller the magnification, the lower the resolution of the objective, and the greater the working distance, and greater the field of view.
High-magnification objectives (such as 80X and 100X objectives) have a very short working distance. Be very careful when focusing for observation. Generally, it is after the objective is in position, the axial limit protection is locked, then the objective is moved away from the direction of the observed object.
The relatively greater working distance leaves a relatively large space between the objective and the object to be observed. It is suitable for under microscope operation, and it is also easier to use more illumination methods. The defect is that it may reduce the numerical aperture of the objective, thereby reducing the resolution.

Numerical Aperture (N.A.)Close Λ

Numerical aperture, N.A. for short, is the product of the sinusoidal function value of the opening or solid angle of the beam reflected or refracted from the object into the mouth of the objective and the refractive index of the medium between the front lens of the objective and the object.
Simply speaking, it is the magnitude of the luminous flux that can be brought in to the mouth of the objective adapter, the closer the objective to the specimen for observation, the greater the solid angle of the beam entering the mouth of the objective adapter, the greater the N.A. value, and the higher the resolution of the objective.
When the mouth of the objective adapter is unchanged and the working distance between the objective and the specimen is constant, the refractive index of the medium will be of certain meaning. For example, the refractive index of air is 1, water is 1.33, and cedar oil is 1.515, therefore, when using an aqueous medium or cedar oil, a greater N.A. value can be obtained, thereby improving the resolution of the objective.

Formula is：
N.A. = refractive index of the medium X sin solid angle of the beam of the object entering the front lens frame of the objective/ 2

Numerical aperture of the objective. Usually, there is a calculation method for the magnification of the microscope. That is, the magnification of the microscope cannot exceed 1000X of the objective. For example, the numerical aperture of a 100X objective is 1.25, when using a 10X eyepiece, the total magnification is 1000X, far below 1.25 X 1000 = 1250X, then the image seen in the eyepiece is relatively clear; if a 20X eyepiece is used, the total magnification will reach 2000X, much higher than 1250X, then eventhoughthe image actually seen by the 20X eyepiece is relatively large, the effect will be relatively poor.

Objective ResolutionClose Λ

Objective resolution is the distance that can be distinguished between the two mass points on the object plane, or the number of pairs that can be distinguished within 1mm of the image place. Usually, its unit is expressed as the number of pairs/mm.
In general, the greater the magnification, the higher the resolution.
Under the same objective magnification, the greater the numerical aperture (N.A.) of the objective, the higher the resolution of the objective. Numerical aperture (N.A.) is the most important technical index reflecting the resolution of the objective.
The objective is located at the forefront of the object being observed. When the objective magnifies and forms an image, the rear eyepieces and other equipment are to magnify again. When the eyepiece magnifies enough, one may only get a large enough but blurred image. Therefore, if the front-end objective cannot distinguish, neither can the rear device or equipment distinguish againmore information. The objective is the most important part of a microscope.

Objective Cover Glass ThicknessClose Λ

The thickness of the cover glass affects the parfocal distance of the objective. Usually, in the design of the focal length of the objective,the thickness of the cover glass should be considered, and the standard is 0.17mm.

Objective Immersion MediaClose Λ

The use of different media between the objective and the object to be observed is to change and improve the resolution. For example, the refractive index of air is 1, water is 1.33, and cedar oil is 1.515. Therefore, when using an aqueous medium or cedar oil, a greater N.A. value can be obtained, thereby increasing the resolution of the objective.
Air medium is called dry objective, where oil is used as medium iscalled oil immersion objective, and water medium is called water immersion objective.
However, because of the working distance of the objective, when the working distance of the objective is too long, the use of liquid medium will be relatively more difficult, and it is generally used only on high magnification objective having a shorter working distance, such as objectives of 60X, 80X and 100X.

When using oil immersion objective, first add a drop of cedar oil (objective oil) on the cover glass, then adjust the focus (fine adjustment) knob, and carefully observe it from under the side of the objective of the microscope, until the oil immersion objective is immersed in the cedar oil and close to the cover glass of the specimen, then use the eyepiece to observe, and use the fine focus knob to lift the tube until the clear imageof the specimen is clearly seen.
The cedar oil should be added in an appropriate amount. After the oil immersion objective is used, it is necessary to use a piece of lens wiping tissue to dip xylene to wipe off the cedar oil, and then wipe dry the lens thoroughly with a lens wiping tissue.

Spring Mounted ObjectiveClose Λ

The front end of the objective is equipped with a spring device. When the working distance of the objective is too short, focusing can easily make the objective contact the object to be observed, thereby damaging the object to be observed or the front lens. At this time, the spring acts to recover the front end of the objective lens. It is usually used on high magnification objectives with very short working distances.

Objective Screw ThreadClose Λ

For microscopes of different manufacturers and different models, the thread size of their objectives may also be different.
In general, the objective threads are available in two standard sizes, allowing similar objectives between different manufacturers to be used interchangeably.
One is the British system: RMS type objective thread: 4/5in X 1/36in,
One is metric: M25 X 0.75mm thread.

Illumination BaseClose Λ

Illumination base is a modular light source component, suitable for microscope stand base that has no light source of itself, and it is usually dedicated components supporting some stands.
Illumination base typically includes at least one bottom lighting, and there are also illumination base that includes the circuit portion of the upper light source.

Coaxial Coarse/Fine FocusClose Λ

Focus mechanism, the coarse / fine focus knobs are in a coaxial center position, they are connected together by a gear reduction mechanism, which can be coarse/ fine focus adjusted at any time during the entire stroke.
Generally, the coarse focus diameter is relatively big, which is inside close to the body of the microscope, and the fine focus diameter is relatively small, which is outside of the body of the microscope. Coarse focus adjustment is used to quickly move to find the image, and the fine focus adjustment is used to finely adjust the clarity of the image. Generally, the minimum read value of the fine focus adjustment can be accurate to 1 micron, and single circle can reach a stroke of 0.1 mm. Mechanical fine focus plays a very important role in the accuracy of the microscope resolution. If the fine focus accuracy is not enough, or cannot be stabilized at the sharpest focusing position, the image will be out of focus and become blurred.
The tightness of coarse focus is generally adjustable. Generally, on one side of the knob (usually on the right side), there is a textured knob on the inside of the coarse knob, which is tightened if rotated clockwise; and loosened if rotated counterclockwise.

In the process of focusing, direct focusing should not be on the objective of high magnification; instead, find the object of low magnification first, and gradually adjust to high magnification. Usually, the coarse focus knob is rotated first, and when the objective lens is gradually lowered or the platform is gradually rising, find the object, and then adjust with the fine focus, until the object image in the field of view is clear. Generally, when changing from low magnification to high magnification objective, one only need to slightly adjust the fine focus knob to make the object image clear. During the process, the distance between the objective and the specimen should be observed from the side, to understand the critical value of the object distance between the lens and the specimen.
When using a high magnification objective, since the distance between the objective and the specimen is very close, after the image is found, the coarse focus knob cannot generally be used, and the fine focus knob can only be used to avoid excessive distance of movement, damaging the objective and the slide or specimen.

By using the characteristics of the fine focus, the height or thickness of the observed object can be roughly measured under the microscope, such as measuring the thickness of the cell or tissue, the thickness of the cover glass, and the thickness of small objects that cannot be measured by various conventional measuring instruments.
Method of measurement: place the object to be measured at the center of the field of view of the stage. After the image is clearly focused, try to use the highest magnification objective as much as possible, and align the adapter of the top feature point of the object to be measured. After adjusting clear, record the position of scale of the fine focus knob. Then, move the objective down to the adapter of the lowest feature point of the object to be measured, and record the position of scale of the fine focus knob. Then, according to the above fine focus, record the number of rounds of movement, and based on the parameters of conversion of each round into stroke (see the microscope fine focus knob parameters), the number of rounds is converted into the total stroke, which is the height of the object to be measured. If it is repeated a few times for average, a more accurate measurement can be obtained.

Focus LimitedClose Λ

Mostly, at the junction of the compound microscope platform and the body, there is a longitudinal limit mechanism. When the limit mechanism is locked, the platform is prevented from moving up and colliding with the microscope objective, thereby damaging the specimen or destroying the lens.
On its first use, use one specimen, applying 100X or the highest magnification lens, carefully find the clearest image, then lock the axial limit mechanism down, the focus mechanism will remember this position. When the focus is adjusted again to reach this position in the future, it will not go up again, and the platform or specimen will not touch the lens.

Focusing Knob Tightness AdjustableClose Λ

Different microscope bodies, different human operations, and different requirements for observation and operation, all require adjustment of the pre-tightening force of the stand that support microscope body.
Facing the stand just right, use both hands to reverse the force to adjust the tightness. (face the knob of one side just right, clockwise is to tighten, counterclockwise is to loosen)
In general, after long-time use, the knob will be loose, and adjustment is necessary.

Stage Backlight Window SizeClose Λ

Stage backlight window size refers to the size of the window through which the transmitted light passes under the stage on the XY table plane of the stage.
This window is usually covered with a piece of glass. For some stages with accuracy requirements in the XY horizontal direction, the horizontal plane of the glass can be adjusted by the height of the screws on the four corners below, and the consistency with the height of the stage plane is guaranteed.

Stage ScaleClose Λ

The movement of the microscope stage or the mechanical stage can be measured by the moving distance of the ruler, and the size and area of the sample details can be calculated.
The ruler can be divided into main scale and sub-scale. The minimum grid value of the main scale is 1 mm, the integer is measured; the minimum grid value of the sub-scale is 0.9 mm, the decimal is measured. When measuring, if what the main ruler measures is not an integer and therefore one needs to read the decimal of the specimen, align the end point of the sub-scale to the end of this specimen, and then find the scale on the line of main ruler and the sub-ruler, and see which group is the closest, the length of this decimal is the reading of the sub-scale.

Abbe Condenser Close Λ

Abbe condenser is a kind of bright field condenser, a condenser that can only finitely correct the spherical aberration, but not the chromatic aberration. When the numerical aperture of its objectives is higher than 0.6, Abbe condenser will show chromatic aberration and spherical aberration.

EPI-Fluorescence KitClose Λ

EPI-fluorescence kit, also known as the incidence fluorescence kit or reflection fluorescence kit.
It is an accessory device that excites and emits fluorescence for fluorescent microscope illumination, forming an illumination system that consists an illumination source that can emit ultraviolet light, a configured fluorescent condenser, and filters for excitation and emission of fluorescence etc.

Fluorescence microscope requires a complete set of filters. The fluorescence excitation block is the core component used to excite fluorescent specimens and observe fluorescence in a fluorescence microscope. The excitation and emission filters, after combination, are placed in a filter cube. When the user replaces the filter, it is relatively convenient. The component consisting of several filter blocks in the excitation module includes:
Exciter filter: selects the light that passes through a certain wave band to excite the specimen to produce fluorescence.
Dichroic mirror (commonly known as a mirror): set at a 45-degree angle in the cube, reflect the excitation light downwards and transmit the fluorescent upwards.
Barrier filter: transmit the emitted light, that is, fluorescence, and at the same time block the reflected light in the various stray light and excitation light.

Fluorescence is excited by light of a specific wavelength, and the emitted light that is excited has also a specific wavelength. Therefore, it is necessary to select suitable excitation blocks (mainly selecting the light wavelength parameters of excitation light filter, dichroic mirror and barrier filter).

The excitation module is generally named after the basic color tone. The first letter represents the excitation spectrum region of the wavelength, that is, the color tone. For example, UV represents ultraviolet light, V represents violet, B represents blue, and G represents green. The subsequent letter represents the glass, and the numbers represent the model features. For example, BG12 is a kind of blue glass, B is the first letter of blue, and G is the first letter of glass.

Color FilterClose Λ

Color filter is a type of filter that allows light of only a certain wavelength and color range to pass, while light of other wavelengths is intercepted. Color filter is made of colored glass, and it has various bandwidths and color for selection.
Both artificial light source (lamp light) and natural light (daylight) are all full-color light, including seven colors, namely, red, orange, yellow, green, blue, indigo and purple. As the microscope illumination, different types of light sources have different color temperatures and brightness. In order to adjust the color of the light source, it is necessary to install a filtering device at the light exit port of the light source, so that the spectrum of a certain wavelength band is transmitted or blocked. Color filter generally can only be added to the illumination path to change the color of the illumination source and improve the contrast of the image, but generally it is not installed in the imaging path system, which affect the image quality.

There are many types of color filters. In addition to the color requirements, color filters of different colors also contribute to the imaging quality. Color filters using the same color will brighten the color of the image.

Of the traditional daylight filter, there are relatively more red and yellow light in the lamp light, the resolution is not high, and the observation is not comfortable. The use of daylight filter can absorb the color between yellow to red spectrum emitted by the light source, thus the color temperature becomes much closer to daylight, making microscope observation more comfortable, and it is one of the most used microscope color filters.
Daylight blue filter can get close to the daylight spectrum, obtain more short-wave illumination, and improve the resolution of the objective lens. For example, using blue color filter (λ=0.44 microns) can improve the resolution by 25% than green color filter (λ=0.55 microns). Therefore, blue color filter can improve the resolution, and improve the image effect observed under the microscope. However, the human eye is sensitive to green light with a wavelength of about 0.55 microns. When using blue color filters for photomicrography, it is often not easy to focus on the projection screen.
Yellow and green filters: both yellow and green filters can increase the contrast (i.e. contrast ratio) of details of the specimen. As far as the achromatic objective lens is concerned, the aberrations in the yellow and green bands are better corrected. Therefore, when yellow and green color filters are used, only yellow and green light passes, and the aberration will be reduced, thereby improving the imaging quality. For semi-apochromatic and apochromat objectives, the focus of visible light is concentrated. In principle, any color filter can be used, but if yellow and green filters are used, the color will make the human eye feel comfortable and soft.
Red filter. Red has the longest wavelength and the lowest resolution in visible light. However, red light image can filter and eliminate the variegated background in the image. Therefore, so it has a very good effect for some applications that do not require color features for identification, and the edges and contours of the image are also the clearest, which is more accurate for measurement.
Medium gray filters, also known as neural density filters, or ND for short, can uniformly reduce visible light. It is suitable for photomicrography and connection to computer monitors for observation. ND can be used for exposure control and good light absorption, and reduce the light intensity while not changing the color temperature of the microscope light source.

Coupler/C-mount AdapterClose Λ

Coupler/C-mount adapter is an adapter commonly used for connection between the C-adapter camera (industrial camera) and a microscope.

Adjustable CouplerClose Λ

On the coupler/C-mount-adapter, there is an adjustable device to adjust the focal length.

Coupler for Microscope TypeClose Λ

Different coupler/C-mount-adapters are suitable for different microscopes. For some, some adapter accessories need to be replaced. See the applicable range of each coupler/C-mount-adapter for details.

Coupler MagnificationClose Λ

Coupler magnification refers to the line field magnification of the coupler/C-mount-adapter. With different magnifications of the adapter lens, images of different magnifications and fields of view can be obtained. The size of the image field of view is related to the sensor size and the coupler/C-mount-adapter magnification.

Camera image field of view (mm) = sensor diagonal / coupler/C-mount-adapter magnification.

For example: 1/2 inch sensor size, 0.5X coupler/C-mount-adapter coupler, field of view FOV (mm) = 8mm / 0.5 = 16mm.
The field of view number of the microscope 10X eyepiece is usually designed to be 18, 20, 22, 23mm, less than 1 inch (25.4mm). Since most commonly used camera sensor sizes are 1/3 and 1/2 inches, this makes the image field of view on the display always smaller than the field of view of the eyepiece for observation, and the visual perception becomes inconsistent when simultaneously viewed on both the eyepiece and the display. If it is changed to a 0.5X coupler/C-mount-adapter, the microscope image magnification is reduced by 1/2 and the field of view is doubled, then the image captured by the camera will be close to the range observed in the eyepiece.
Some adapters are designed without a lens, and their optical magnification is considered 1X.

For Camera Sensor SizeClose Λ

For the size of the lens field of view of the coupler/C-mount-adapter, in the design process, the size of the camera sensor imaging target should be considered. When the field of view of the lens is smaller than the target plane of the camera, “black border” and “dark corner” will appear.
The general microscope coupler/C-mount adapters are generally designed for the 1/2" camera targets. When a camera of 2/3 or larger target is used, the “dark corner” phenomenon will appear in the field of view. Especially, at present, DSLR cameras generally use large target plane design (1 inch full field of view), when used for microscopic photographing, the general DSLR camera coupler/C-mount adapter will have “black border”.
Generally, the “dark corner” that appears on the field of view is often that the center of the microscope and the camera are not aligned. Adjust the position of the screw on the camera adapter, or turn the camera adapter to adjust or change the effect.

C/CS-Mount CouplerClose Λ

At present, the coupler/C-mount adapter generally adopts the C/CS-Mount adapter to match with the industrial camera. For details, please refer to "Camera Lens Mount".

Sneeze GuardClose Λ

Sneeze guard is mainly to provide isolation and protection between the operator and the object being observed.
When using ultraviolet light, although the ultraviolet radiation dose is not high, long time observation can have a harmful effect on the human eye, and therefore it is necessary to use sneeze guard to isolate.
The sneeze guard can also isolate harmful, radiating, and volatile substances to ensure the safety and health of the operator. On the other hand, it can also prevent people from exhaling, sneezing, etc. during operation, thereby polluting the observed objects.

PackagingClose Λ

After unpacking, carefully inspect the various random accessories and parts in the package to avoid omissions. In order to save space and ensure safety of components, some components will be placed outside the inner packaging box, so be careful of their inspection.
For special packaging, it is generally after opening the box, all packaging boxes, protective foam, plastic bags should be kept for a period of time. If there is a problem during the return period, you can return or exchange the original. After the return period (usually 10-30 days, according to the manufacturer’s Instruction of Terms of Service), these packaging boxes may be disposed of if there is no problem.

Optical Data

Microscope Optical Data Sheet
P/N	Objective	Objective Working Distance	Eyepiece
			BM03022211 (10X Dia. 20mm)		BM03022212 (10X Dia. 22mm)		BM03022511 (16X Dia. 13mm)
			Magnification	Field of View(mm)	Magnification	Field of View(mm)	Magnification	Field of View(mm)
BM03023231	4X	12.31mm	40X	5mm	40X	5.5mm	64X	3.25mm
BM03023331	10X	5.03mm	100X	2mm	100X	2.2mm	160X	1.3mm
BM03023431	20X	1.24mm	200X	1mm	200X	1.1mm	320X	0.65mm
BM03023531	40X	0.72mm	400X	0.5mm	400X	0.55mm	640X	0.32mm
BM03023631	60X	0.4mm	600X	0.33mm	600X	0.37mm	960X	0.22mm
BM03023831	100X	0.17mm	1000X	0.2mm	1000X	0.22mm	1600X	0.13mm
1. Magnification=Objective Optical Magnification * Body Magnification * Eyepiece Optical Magnification
2. Field of View=Eyepiece Field of View /（Objective Optical Magnification*Body Magnification）
3. The Darker background items are Standard items, the white background items are optional items.

Video Microscope Optical Data Sheet
P/N	Objective	Coupler
		BM03014111 (0.25X)	BM03014161 (1X)
		Magnification	Magnification
BM03023231	4X	1X	4X
BM03023331	10X	2.5X	10X
BM03023431	20X	5X	20X
BM03023531	40X	10X	40X
BM03023631	60X	15X	60X
BM03023831	100X	25X	100X
1. Magnification=Objective Optical Magnification * Body Magnification * Coupler Magnification

Camera Image Sensor Specifications
No.	Camera Image Sensor Size	Camera image Sensor Diagonal
No.	Camera Image Sensor Size	（mm）	（inch）
1	1/4 in.	4mm	0.157"
2	1/3 in.	6mm	0.236"
3	1/2.8 in.	6.592mm	0.260"
4	1/2.86 in.	6.592mm	0.260"
5	1/2.7 in.	6.718mm	0.264"
6	1/2.5 in.	7.182mm	0.283"
7	1/2.3 in.	7.7mm	0.303"
8	1/2.33 in.	7.7mm	0.303"
9	1/2 in.	8mm	0.315"
10	1/1.9 in.	8.933mm	0.352"
11	1/1.8 in.	8.933mm	0.352"
12	1/1.7 in.	9.5mm	0.374"
13	2/3 in.	11mm	0.433"
14	1/1.2 in.	12.778mm	0.503"
15	1 in.	16mm	0.629"
16	1/1.1 in.	17.475mm	0.688"

Digital Magnification Data Sheet
Image Sensor Size	Image Sensor Diagonal size	Monitor
		Screen Size (24in)
		Digital Zoom Function
1/3 in.	6mm	101.6
1. Digital Zoom Function= (Screen Size * 25.4) / Image Sensor Diagonal size

Microscope Optical and Digital Magnifications Data Sheet
Objective		Coupler		Camera		Monitor	Video Microscope Optical Magnifications	Digital Zoom Function	Total Magnification	Field of View (mm)
PN	Magnification	PN	Magnification	Image Sensor Size	Image Sensor Diagonal size	Screen Size	Video Microscope Optical Magnifications	Digital Zoom Function	Total Magnification	Field of View (mm)
BM03023231	4X	BM03014111	0.25X	1/3 in.	6mm	24in	1X	101.6	101.6X	6mm
BM03023231	4X	BM03014161	1X	1/3 in.	6mm	24in	4X	101.6	406.4X	1.5mm
BM03023331	10X	BM03014111	0.25X	1/3 in.	6mm	24in	2.5X	101.6	254X	2.4mm
BM03023331	10X	BM03014161	1X	1/3 in.	6mm	24in	10X	101.6	1016X	0.6mm
BM03023431	20X	BM03014111	0.25X	1/3 in.	6mm	24in	5X	101.6	508X	1.2mm
BM03023431	20X	BM03014161	1X	1/3 in.	6mm	24in	20X	101.6	2032X	0.3mm
BM03023531	40X	BM03014111	0.25X	1/3 in.	6mm	24in	10X	101.6	1016X	0.6mm
BM03023531	40X	BM03014161	1X	1/3 in.	6mm	24in	40X	101.6	4064X	0.15mm
BM03023631	60X	BM03014111	0.25X	1/3 in.	6mm	24in	15X	101.6	1524X	0.4mm
BM03023631	60X	BM03014161	1X	1/3 in.	6mm	24in	60X	101.6	6096X	0.1mm
BM03023831	100X	BM03014111	0.25X	1/3 in.	6mm	24in	25X	101.6	2540X	0.24mm
BM03023831	100X	BM03014161	1X	1/3 in.	6mm	24in	100X	101.6	10160X	0.06mm
1. Video Microscope Optical Magnifications=Objective Optical Magnification * Body Magnification * Coupler Magnification
2. Digital Zoom Function= (Screen Size * 25.4) / Image Sensor Diagonal size
3. Total Magnification= Video Microscope Optical Magnifications * (Screen Size * 25.4) / Image Sensor Diagonal size
4. Field of View (mm)= Image Sensor Diagonal size / Video Microscope Optical Magnifications

Contains

Parts Including

Picture	P/N	Product Name
	BU99051110	20V 100W Mercury Bulb
	EP99031131	3.15A Fuse
	FM03026101	EPI-Fluorescence Kit
	FM03026151	UV-free Front Light Baffle
	BM03014161	1X Coupler
	BM03015341	Condenser
	BM03021321	Compound 20/80 True-Trinocular Head
	BM03022211	10X High Eyepoint Eyepiece (Pair Φ30/FN20)
	BM03023231	4X Infinity Plan Achromatic Objective
	BM03023331	10X Infinity Plan Achromatic Objective
	BM03023531	40X Infinity Plan Achromatic Objective
	BM03023831	100X Infinity Plan Achromatic Objective
	BM03025521	38mm Filter (Blue)

Desiccant Bag

1 Bag

Dust Cover

1pc

Cedar Oil

1 Bottle

Fuse

4pc

Spare Bulb

3pc

Product Instructions/Operation Manual

1pc

Packing
Packaging Type	Carton Packaging
Packaging Material	Corrugated Carton
Packaging Dimensions(1)	51x33x53.5cm(20x13x21″)
Inner Packing Material	Plastic Bag
Ancillary Packaging Materials	Expanded Polystyrene
Gross Weight	21.30kg(46.96lbs)
Minimum Packaging Quantity	1pc
Transportation Carton	Carton Packaging
Transportation Carton Material	Corrugated Carton
Transportation Carton Dimensions(1)	51x33x53.5cm(20x13x21″)
Total Gross Weight of Transportation(kilogram)	21.3
Total Gross Weight of Transportation(pound)	47
Quantity of One Transportation Carton	1pc