BMU800 Advanced Uprigh Metallurgical Microscope

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  • BMU800 Advanced upright metallurgical Microscope
  • Transmitted & Reflected illumination or Reflected Only
  • Brightfield, Darkfield imaging with optional Polarizing, DIC Nomarsky, and customizable for Phase-Contrast & Fluorescence imaging
  • 5x, 10x, 20x, 50x and 100x Plan Semi-Apo objective lenses included, optional 1.25x, 2x, 2.5x, 4x, 40x, 60x and LWD types
  • 5-, 6- and even 7-position nosepiece is available
  • High eyepoint 10x/FN25 eyepieces

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BMU800 Advanced Metallurgical Microscope

Viewing head with multi-splitting ratio

BMU800 viewing head is designed of multiple options for splitting ratio. With wide beam imaging system, 26.5mm super wide filed of view is available.
Trinocular head with erect image, splitting ratio Binocular:Trinocular= 100:0 or 0:100. The moving direction of samples is as the same as observed.

Trinocular head with inverted image, splitting ratio Binocular: Trinocular=100:0 or 20:80 or 0:100. Except for concentrating 100% light to eyepiece tube or camera tube, there is another option with 20% light to eyepiece tube and 80% to camera tube, so that eyepiece observation and image output can be available at the same time.

Polarization system

The polarizer and analyzer in polarization system contribute to eliminate the stray light in semiconductor and PCB detection, image with clear detail is achievable. There are fixed analyzer and rotatable analyzer for option. The sample can be observed at different polarizing angles with 360。rotatable analyzer. Besides, this polarization system can be upgraded to Nomarski differential interference contrast system after installing a new developed DIC attachment.

Nomarski differential interference contrast system

The weeny asperities on the surface which can not be found in bright field, is able to be detected by using U-DICR attachment to create high contrast background. It is widely used for testing the conductive particle of LCD, surface scratch of precision disk.

Linkage between the neutral density filter and the switch for BF & DF

The lever in front of illuminator is used to switch between bright field and dark field, and it is in tandem with a neutral density filter (ND50). When you switch from DF to BF, the built-in ND50 filter takes the role to decay the light intensity. More scientific and more comfortable.


Optional nosepieces

The included angle between optical axis and rotation axis of multiple nosepiece is decreased to 15° . It is helpful to improve the accuracy of centering and focusing. Seven objectives at most can be assembled at the same time. Continuous and reasonable magnifications from low to high is achievable.

nosepiece, up to 7 spots
Ergonomic design

■ The intensity can be flexibly adjusted by the dimming device which is located on the right side of frame. The voltage change all-digital displays. Adjusting intensity and coaxial focusing at the same time, improves the work efficiency.
■ Reflected or transmitted illumination can be switched by the button on the digital dimming display. Using the RE-SET button to keep the light intensity at around 8V (with a camera mark on the dimming display) which is an optimal voltage for photomicrography.
■ Four built-in filter holders with three standard filters, one empty holder for optional filter. All the filters can be moved out the optical path by pulling out the lever.
■ Low position coaxial focusing system with tension adjustment. The coarse range is 25mm and the fine precision is 0.001mm. The height of a tiny sample,such as solder ball, can be measured.

Stage with adjustment on the right hand

4 inches double-layer mechanical stage, with the lock device to limit Y axis movement. It is widely used in horizontal detection to avoid missing.
Glass plate is attachable for transmitted light.

front view- middle section
Lamphouse Transmitted and reflected illuminator

12V 100W long lifetime lamp-house with PHILIPS 7724 halogen bulb, provides bright and uniform light. New swing-out type achromatic condenser (N.A.0.9) optimizes the performance of Kohler illumination in lower magnification and corrects the chromatic and spherical aberration .


Professional LWD semi-apochromatic metallurgical objectives

■ BD objectives are designed for all-purpose, available for bright field/dark field/ polarizing/DIC observation. With plenty passed light, the efficiency of sample inspection is improved.
■ Strictly using high transmittance lens and advanced coating technology, restores the natural color of samples.
■ Aluminum cover reduces the weight, prevents the pollution, and also improves the controllability of nosepiece.
■ Semi apochromatic design improves the contrast and definition of images.
■ Long working distance meets the demands of professional detection, is widely applied in all kinds of industrial fields.
■ These objectives also can be used in fluorescence observation.
■ Professional LWD bright field objective for option.


High eye-point ultra wide field plan eyepieces

■ SC50M eyepiece breaks through 22mm conventional field of view, reaching to 25mm and 26.5mm, much smoother and wider field of view, is helpful to improve the work efficiency.
■ Locating pin on eyepiece inserts into the eyepiece tube, fixing the eyepiece for easy focusing. Bigger adjustable range of diopter from -8 to +5, meets more demands of different users.
■ Eyepiece cup can be turn up to avoid external stray light. Spectacle-wearers should turn down the cup to protect both spectacles and eyepieces.

Transmitted & Reflected Reflected
Observe head 30°inclined, erect image infinity gemel trinocular head with interpupillary distance 50-76mm,split ratio 100:0 or 0:100
Eyepiece High-eyepoint Plan eyepeiece PL10X/25mm,diopter adjustable ●● ●●
BF&DF Semi-APO objective BD semi-apochroomatic metallurgical objective 5X/0.15,WD=13.5mm
BD semi-apochroomatic metallurgical objective 10X/0.30,WD=9mm
BD semi-apochroomatic metallurgical objective 20X/0.50,WD=2.5mm
BD semi-apochroomatic metallurgical objective 50X/0.80,WD=1.0mm
BD semi-apochroomatic metallurgical objective 100X/0.90,WD=1.0mm
Nosepiece BD sextuple nosepiece(with DIC slot)
Microscope frame Reflected/Transmitted body, low-position coaxial coarse and fine adjustment, coarse adjustment distance: 25mm; fine precision: 0.001mm. with coarse adjustment stop and tightness adjustment. Built-in 100-240V wide voltage transformer, double-way power output. intensity adjustable by digital set and reset; switch for reflection and transmission, built-in transmitted filters LBD/ND6/ND25)
Reflected body, coaxial coarse and fine adjustment,coarse adjustment distance: 25mm, fine precision: 0.001mm. With coarse adjustment stop and tightness adjustment. Built-in 100-240V wide voltage transformer, intensity adjustable with digital set and reset.
Reflected illuminator BD reflected illuminator with iris field diaphragm and aperture diaphragm, central adjustable. With switch for bright and dark field. With filter slot and polarizing slot.
12V/100W halogen lamp hose, center pre-set. ●●
12V/100W halogen bulb(Philips 7724) ●●●● ●●
Filter Interference filter, blue, for reflected light ≤ 480nm O O
Interference filter, green, for reflected light 520nm-570nm O O
Interference filter, red, for reflected light 630nm-750nm O O
Interference filter, natural, for reflected light
Stage 4 inch three layers mechanical stage with glass plate, moving range: 102mm(Y)*105mm(X)
Condenser Swing-out type achromatic condenser(NA 0.9) /
Polarizing device Fixed polarizer
Fixed analyzer
360°rotatable analyzer O O
Camera mount 0.5X focusing C-mount O O
other tools High precision micrometer, scale value 0.01mm O O
Allen Key(For M4)
Allen Key(For M5)
Sponge + inner box + carton(For single pack)
DIC DIC attachment O O

“●” for standard, “O” for option.


Part 1. BMU800 /BUM800 Upright Microscope Overview

Part 2. Phase Contrast Kit and Sample Images

BUM-PHK Phase Contrast Kit for Upright Biological Microscopes is composed of 10x, 20x, 40x , 60x and 100x (oil) Phase contrast objective lenses, green filter, Phase alignment tool and turret condenser with different annulus.
In this video we look at the samples images of an Onion Skin thins section slide and Tilia (basswood) thin section slide, using this kit installed on Bioimager BUM800FL upright biological microscope and connected a 2.3MP USB3.0 CMOS Colorful Camera as well as a 0.5x C-Mount Adapter.


sample iamges

System Diagram

This system can also be upgraded to the following models or to be customized to have extra imaging capabilities:
Epi-Fluor Upright Microscope, BUM800FL
Biological Upright Microscope, BUM800
Polarizing Microscope, BPM800

system diagram

BMU800 Metallurgical Microscope Brochure_2019


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