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LB-290 Inverted Trinocular Biological Microscope
with Infinite Optical System

LB-290 Inverted Trinocular Biological Microscope with Infinite Optical System This microscope is a high level microscope which is specially designed for medical and health units, universities, research institutes to observe cultured living cells. It adopts an Infinite optical system, reasonable structure and ergonomic design. With an innovative optical and structure design idea, excellent optical performance and easy to operate system, this inverted biological microscope makes your work enjoyable. A digital camera or digital eyepiece can be added to the trinocular head to take photos and videos.

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


  • Excellent optical function with infinitive optical system.
  • Innovative stand structure, sharp image display, convenient and special for viewing incubating cell tissue.
  • A trinocular head is optional.

With LWD Infinitive Plan Objective, Making Viewing Field Flatter and Brighter, Contrast Sharper, Living Cell Observing easier

Advanced and Reliable Mechanical Stage with Knob
Height and Tightness Adjustable

Different Holders for Various Observations

With pre-centerable Phase Annulus, Available to
Observe Low Contrast or Transparent Specimens

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Technical Specifications


LB-290 Inverted Trinocular Biological Microscope with Infinite Optical System is used by medical and health units, universities, research institutes for observations of micro-organisms, cells, bacteria and tissue cultivation. It can be used for continuous observation of process of cells and bacteria as they grow and divide in the culture medium. Videos and images can be taken during the process. This microscope is widely used in cytology, parasitology, oncology, immunology, genetic engineering, industrial microbiology, botany and other fields.

Viewing Head

optical system

Trinocular Head Inclined at 30°, Interpupillary Distance 48-75mm

Infinite optical system


High-point, Extra Wide Field Eyepiece EW10×/ 22


LWD(Long Working Distance) Infinite Plan Objective

4×/ 0.1, WD 18mm

40×/ 0.6, WD 2.6mm

Infinite Plan Phase Objective

PH10×/ 0.25, WD 10 mm

PH20×/ 0.4, WD 5.1mm


Quintuple Nosepiece


ELWD(Extra Long Working Distance) Condenser NA 0.3, LWD 72mm (Without Condenser 150mm)


Centering Telescope (Φ30MM)

Phase Annulus

10×-20×, 40× Phase Annulus Plate


Plain Stage 160×250mm

Glass Insert (optional)

Auxiliary Stages 70mm×180mm
Terasaki Holder (optional)
Petri Dish Holder Φ35MM and Φ90MM (optional)
Slide Glass Holder Φ54MM (optional)


Coaxial Coarse and Fine Adjustment, Vertical Objective Movement, Coarse Stroke 37.7mm per Rotation, Fine Stroke 0.2mm per Rotation


Halogen Lamp 6V/30W


Diameter 45mm, Blue, Green and Frosted Filter

Dimension & G.W.

46.5cm*39.5cm*64cm, 15.5kg


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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 Email:, 

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