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Labomed Inc.

LB-531 Transmitted Polarizing Trinocular Microscope

with Wide Field and Bertrand Lens

with Infinite Strain Free Plan Achromatic Objective 4x, 10x, 20x, 40x

The LB-531 Polarizing Trinocular Microscope feature a highly robust construction and first class optics to provide a long life and excellent quality images. Accessories like Gypsum slide, Mica slide, Quartz wedge and Mechanical stage are available. The microscopes are specifically designed for geology, minerals and material areas. They also can be used in chemical fiber, semiconductor and pharmaceutical industries.

Labomed Inc. is certified by ISO 9001, CE Conformity and is FDA Licensed.


  • Excellent Infinite Optical System.
  • Widely used in geology, Mineralogy, Fossil fuel exploration.
  • Single polarization, othorgonal polarization or conoscopic observation is available.

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Technical Specifications


The LB-531 Polarizing Trinocular Microscope are ideal instrument in geology, petroleum, coal, mineral, chemicals, semiconductor and pharmaceutical inspection fields. They are widely used in academic demonstration and scientific research areas.

Item LB-531
Optical System Infinite Optical System
Viewing Head Seidentopf Binocular Head, inclined at 30°, 360° Rotatable, Interpupilary Distance: 48-76mm.
Eyepiece WF10×/20 mm
WF10×/20 mm (Reticule 0.1mm)
Infinite Strain Free 4×/0.10       W.D=10.0mm 
Plan Achromatic Objective (Transmitted) 10×/0.25      W.D=2.1mm 
20×/0.40(S)   W.D=2.41mm 
40×/0.66(S)   W.D=0.45mm 
LWD Infinite Strain Free Plan Achromatic Objective (Reflected) 50×/0.70 (S)     W.D=1.95mm
Nosepiece Backward Quintuple nosepiece, center adjustable
Analyzer Unit Rotatable 360°, module type, can be locked
Bertrand Lens Built In, Center Adjustable
Optical Compensator λ Slip(First Class Red), 1/4λ Slip, Quartz Wedge (Ⅰ- ⅣClass)
Revolving Round Stage Diameter Φ156mm, Rotatable 360°, Center Adjustable, Division 1°, Vernier Division 6’
Focusing Coaxial Coarse & Fine Adjustment, Range 25mm, Fine Stroke 0.2mm, Fine Division 0.002mm
Swing-out Condenser N.A.0.9/0.13 swing out condenser
Polarizing Unit  with Scale, Rotatable 360°, Can Be Locked
Transmitted Illumination Koehler Illumination 6V/20W Halogen Lamp (Input voltage:100V~240V)
Reflecting Polarizing Unit  With field diaphragm, aperture diaphragm, polarizer, 
12V/50W halogen lamp (Input voltage:100V~240V)
Filter Blue
Packing Packing size 750mm×360mm×450mm, Gross Weight 16kgs, Net Weight 12kgs


Sample Images


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Spectrophotometers from Labomed
Labomed, Inc. Mailing Address: 2728 S La Cienega Blvd.
Los Angeles, CA 90034 U.S.A TEL (310) 202-0814  FAX (310) 202-7286

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