Upright Metallurgical Microscope TH-M Series
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Upright Metallurgical Microscope TH-M Series

Model: TH-M3203/3220/3230/3230BD

TOP INSTRUMENT TH-M3203/3220/3230/3230BD Series Upright Metallurgical Microscopes are suitable to observe surfaces of opaque object or transparent object.Thet are equipped with excellent UIS optical system and modularization function design so that provited excellent optical quilatity and operation performance, update system expediently and provided observation in refelected or transmitted and mixed illumination, polarizing observation, dark field observation. These instruments have beautiful sculpt,convenient control and clear image. They are the ideal instruments in research work in biology, metallography,mineralogy, precision engineering, electronics, etc.
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  • TH-M3203/3220/3230/3230BD

  • TOP


  • Observation system

Compensation observation tube: Trinocular, single diopter adjustable, 30° inclined, can be connected to the camera.

Eyepieces: WF10X wide field plan eyepiece, field Φ22mm, can provide an expanse and smooth space for observation.

Objective: Infinity plan achromatic objective (no cover glass)


  • Stage

Double-layer mechanical stage, size: 210mm*140mm; moving range: 75mm*50mm, moderate design concept, users are more convenient and comfortable to operate the stage.


  • Transmission lighting system

Built-in halogen lamp illumination and integrated field diaphragm it can provide clear and bright image.

TH-M3230: 6V 30W halogen lamp, brightness adjustable

TH-M3230BD:12V 30W halogen lamp,brightness adjustable 

TH-M3230/M3230BD: Equipped with blue filter and frosted glass    

TH-M3220: Equipped with blue, yellow and green color filters and frosted glass, the field diaphragm is built in the condenser, and the Abbe condenser N.A.1.25 can be moved up and down.


  • Epi-illumination system

Halogen lamp illumination, brightness adjustable.

Integrated field diaphragm, aperture diaphragm and filter switching device. 

Push-pull type analyzer and polarizer.

Rotary disc filter set, with three color filters of yellow, green, and blue and frosted glass, to provide different chromaticity of illumination for observing various samples.

The clamshell light box design makes it easier and faster to replace the bulb.


  • Dark field observation

Equipped with high-quality bright and dark field objectives and dark field illumination device. Avoid the stray light of illumination system and improve the image quality in the dark field. (TH-M3230BD)

  • Photography unit

High-definition digital video recording and video observation can be realized by configuring video observation accessories (CCD adapter, digital camera adapter, digital SLR camera adapter, etc.).

Eyepiecea tube

Trinocular inclined 30°, can be shot in 100% light flux


WF10X(field number: φ22mm)

Infinity plan achromatic objective


(Equipped with bright

field objectives)

PL L5X/0.12 Working distance: 26.1mm

PL L10X/0.25 Working distance: 20.2mm

PL L40X/0.60 Working distance: 3.98mm

PL L60X/0.70 Working distance: 2.08mm


(Equipped with bright & dark field objectives)

PL L5X/0.12 BD Working distance: 8.05mm

PL L10X/0.25 BD Working distance: 7.86mm

PL L20X/0.40 BD Working distance: 7.2mm

PL L40X/0.60 BD Working distance: 3.0mm


Quintuple (Backward ball bearing inner locating)

Focus system

Coaxial coarse/fine focus system, with tension adjustable and limit stopper,

minimum division of fine focusing: 2um


Double layer mechanical stage, overall size: 210mm*140mm, moving range: 75mm*50mm

Epi-illumination system


6V 30W, halogen lamp and adjutable brightness


12V 50W, halogen lamp and adjustable brightness


euipped with Y.B.G filters and ground glass


euipped with Y.B.G filters

Integrated field diaphragm, aperture diaphragm and filter switching device.

Push-pull type analyzer and polarizer.

Transmitted illumination system

Abbe condenser N.A.=1.25 Rack & pinion adjustable

Collector for halogen lamp illumination and integrated field diaphragm


euipped with B filter and ground glass


euipped with B.G filters and ground glass


6V 30W, halogen lamp and adjutable brightness


12V 50W, halogen lamp and adjustable brightness

Optional Accessory


Dividing eyepiece(φ22mm)



20X, 50X, 80X, 100X(Dry), Bright field objective


50X, 60X, 80X, 100X bright & dark field objective

CCD adapter

0.5X, 1X, 0.5X(With dividing)


USB output: 1.3M/2.0M/3.0M pixel

Video output: 380/520 TV Line

Digital camera adapter


To Make The World Closer To The Truth
ZHEJIANG TOP INSTRUMENT CO.,LTD., as a subsidiary of TOP Cloud agri, is a high-tech enterprise specializing in the R&D, manufacturing, sales for laboratory equipments, and provision of comprehensive laboratory solutions.


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