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Description
Engineered with cool-running 3W LED epi-fluorescence cubes to eliminate mercury warm-up delays, the Kern OBN 141 Trinocular Fluorescence Microscope provides instant-on diagnostic screening for clinical immunology and tuberculosis labs. Operating on an infinity-corrected optical pathway with true flat-field alignment, it delivers 40x, 100x, 200x, 400x, and 1000x magnification via five Plan Achromatic objectives: 4x/0.10, 10x/0.25, 20x/0.40, spring-loaded 40x/0.65, and spring-loaded 100x/1.25 oil immersion.
The reflected epi-fluorescence module incorporates high-intensity 3W LED light engine cubes paired with a quick-switch filter slider loaded with standard Blue (FITC/GFP) and Green (TRITC/Rhodamine) blocks. Transmitted brightfield uses a separate full Köhler 3W LED sub-stage module with a swing-out Abbe 0.9/1.25 NA condenser. The 30-degree inclined trinocular head includes bilateral diopter adjustment, paired WF 10x/20 mm eyepieces, a radiation scatter shield, and a vertical 23.2 mm photo port. Built on an 11.5 kg frame measuring 395 x 200 x 440 mm, it features a 175 x 145 mm scratch-proof mechanical stage (78 x 55 mm XY travel) and coaxial focus knobs with 2-micron graduations.
Key Features of Kern OBN 141 Trinocular Fluorescence Microscope
A professional research-grade LED epi-fluorescence and Köhler brightfield microscope designed for tuberculosis screening and clinical pathogen classification. Features five Infinity Plan objectives, dual 3W LED illumination, Blue/Green filter blocks, a swing-out condenser, and a vertical camera port.
- Five Infinity Plan Achromatic objectives: 4x, 10x, 20x, spring-loaded 40x, and 100x oil
- High-intensity 3W LED epi-fluorescence light engine with quick-switch Blue/Green filter slider
- Full Köhler transmitted 3W LED illumination with swing-out Abbe 0.9/1.25 NA condenser
- Dedicated vertical 23.2 mm photo port with beam splitter for digital camera archiving
- Instant-on LED operation eliminates mercury burner warm-up times and explosion hazards
- Oversized 175 x 145 mm scratch-proof mechanical stage with 78 x 55 mm coaxial XY drive
- Coaxial coarse and fine focus drive with calibrated 2-micrometer fine division markings
- Solid 11.5 kg cast-metal chassis with integrated radiation scatter protection shield
Instant-On LED Epifluorescence & Long-Life Diodes
Mercury vapor burners take 15 minutes to stabilize and must run for hours to prevent electrode damage. The solid-state 3W LED fluorescence module on the OBN 141 fires up instantly at full photon intensity, letting technicians screen emergency auramine smears without waiting. The narrow-band LED emitters run cool to the touch, preventing heat from drying out live cell cultures, while providing over 20,000 hours of operating life without bulb replacements.
Full Köhler Brightfield & Scratch-Proof Stage Mechanics
Swapping between fluorescence and transmitted light is seamless thanks to independent dimmer interfaces for both lighting circuits. The sub-stage swing-out Abbe condenser ensures even, centered illumination across all five objective magnifications. The 175 x 145 mm mechanical stage features a scratch-proof ceramic coating that shrugs off abrasive slide edges and chemical stains, while 2-micron coaxial focus knobs provide delicate focal control under 1000x oil immersion.
- Solid-state LED excitation eliminates expensive replacement bulbs and mercury arc disposal
- Swing-out Abbe condenser matches light cones to low-power 4x and high-power 100x lenses
- Integrated radiation shield protects technician eyes from stray reflected excitation light
Kern & Sohn Three-Year Laboratory Warranty
Kern & Sohn covers the OBN 141 with a comprehensive three-year factory warranty covering optical elements, stand castings, and mechanical stage drives, backed by two years on LED circuitry and filter blocks. The complete package contains the OBN quintuple frame stand, five Infinity Plan objectives, Blue and Green excitation blocks, radiation shield, pair of WF 10x/20 mm eyepieces, photo port tube, immersion oil flask, power cables, dust cover, and manual.
Kern & Sohn OBN 141 Trinocular Fluorescence Microscope Infinity Plan 4x/10x/20x/40x/100x WF10x20 3W LED Blue/Green Filterset Specs
| Brand | Kern & Sohn |
| Full Model Code / SKU | OBN 141 (LED Fluorescence Variant) |
| Country of Origin | Germany |
| Microscope Type | Premium Research-Grade Trinocular Epi-Fluorescence and Brightfield Microscope System |
| Optical System Type | Premium Infinity Corrected Optical Pathway Design System (True Flat-Field Alignment) |
| Observation Tube Type | Trinocular Head Unit with vertical photo dock port and integrated radiation scatter protection shielding |
| Tube Inclination & Rotation | 30° inclined viewing track, 360° rotatable head, adjustable individual interpupillary controls 50-75mm; diopter adjustment on both left and right eyepiece tubes |
| Eyepiece / Field of Number | WF 10x / 20 mm (Paired set, wide-field high-eyepoint layout finish) |
| Nosepiece Design | Revolving quintuple (5-position) reverse-facing objective turret housing mounted on heavy ball-bearing race tracking |
| Objectives Classification | Infinity Plan Achromatic High-Resolution Objective Lens Line (Anti-fungus treated, optimized for high photon transmission across fluorescence spectrums) |
| Objectives Magnification Breakdown | Infinity Plan premium series tracking: 4x/0.10, 10x/0.25, 20x/0.40, 40x/0.65 spring-loaded, and 100x/1.25 spring-loaded oil-immersion micro pathways |
| Total Magnification Range | 40x, 100x, 200x, 400x, and 1000x multi-mode verification limits |
| Focusing Type & Graduation | Coaxial coarse and fine adjustment block knobs with adjustable tension control and safety stop; fine tracking graduation 2 micrometers |
| Stage Dimensions & Surface Coating | Professional oversized mechanical stage platform measuring approx. 175 x 145 mm with hard scratch-proof Gorilla-glass or anodized ceramic protective surface coating |
| Stage Travel Range & Controls | Precision coaxial X-Y axis mechanical translation range approx. 78 x 55 mm with low-positioned right-hand controls |
| Condenser Type & Numerical Aperture | Swing-out Abbe Condenser NA 0.9/1.25 with centering controls, field diaphragm control, and adjustable iris track |
| Illumination Transmitted Type | Full Koehler Illumination system utilizing a high-output 3W LED adjustable sub-stage module for perfectly centered uniform cool brightfield paths |
| Illumination Epi-EPI/Reflected | Epi-Fluorescence reflected light attachment block equipped with a high-intensity 3W LED illumination light engine cube and quick-switch filter wheel slider |
| Light Intensity Management | Independent dual electronic intensity control interfaces: transmitted light dimmer on base panel, fluorescence light output manager on secondary driver block |
| Camera Port / C-Mount Adapter Split | Vertical photo port channel on top of head unit (23.2mm tube interface), standard beam-splitting path routing infrastructure |
| Contrast Methods Capability | Epi-fluorescence blue excitation (FITC/GFP mapping), epi-fluorescence green excitation (TRITC/Rhodamine mapping), premium flat-field Koehler brightfield screening, digital image logging |
| Power Supply & Voltage Input | Internal universal 100-240V AC stabilization power module line links; separate dedicated low-voltage DC drive unit for the epi-illumination module |
| Physical Dimensions & Net Weight | Base assembly 395 x 200 mm, extended height 440 mm, complete assembly net weight approx. 11.5 kg |
| Standard Package Accessories Included | OBN quintuple stand frame, five infinity plan objectives, Blue excitation block, Green excitation block, light barrier shield, pair of WF 10x/20mm eyepieces, vertical photo channel, immersion oil flask, power cables, dust cover, manual |
| Primary Application & Environment | Immunofluorescence clinical testing workstations, tuberculosis screening benches, microbiology pathogen classification desks, molecular biology corporate research hubs |
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