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Description
Operating with a 5-position phase turret condenser and full Köhler optics, the Kern OBN 158 Phase Trinocular Microscope provides comprehensive live-cell analysis for clinical diagnostic labs. It delivers 40x, 100x, 200x, 400x, and 1000x magnification via an infinity-corrected optical train. The reversed quintuple nosepiece carries five Plan Achromatic lenses: a 4x/0.10 brightfield scanner, plus four Plan Phase objectives (10x/0.25, 20x/0.40, spring-loaded 40x/0.65, and spring-loaded 100x/1.25 oil immersion) for high-contrast viewing of unstained biological specimens.
Transmitted light is supplied by an adjustable 6V/20W halogen bulb paired with an NA 1.25 turret condenser housing matched annular phase rings and a field diaphragm for centered, glare-free Köhler illumination. The 30-degree inclined trinocular head features bilateral diopter equalization, widefield high-eyepoint WF 10x/20 mm eyepieces, and a vertical 23.2 mm photo port with an internal beam splitter. Built around an oversized 175 x 145 mm scratch-proof stage with a ceramic protective coating (78 x 55 mm XY travel), the 9.5 kg cast chassis incorporates coaxial coarse and fine focus knobs with 2-micron graduations on universal 100-240V AC power.
Key Features of Kern OBN 158 Phase Trinocular Microscope
A premium research-grade trinocular phase-contrast compound microscope featuring full Köhler halogen illumination and a 5-position turret condenser. Combines five Infinity Plan objectives with an oversized ceramic-coated stage, 2-micron focus mechanics, and a dedicated vertical camera port.
- Five Infinity Plan objectives: 4x brightfield plus 10x, 20x, 40x, and 100x oil phase contrast
- Advanced 5-position phase turret condenser (NA 1.25) with matched annular rings and field iris
- Full Köhler transmitted illumination with 6V/20W halogen bulb and centering controls
- Dedicated vertical 23.2 mm photo port with beam splitter for digital camera archiving
- 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
- High-eyepoint WF 10x/20 mm widefield eyepieces with bilateral diopter adjustments
- Solid 9.5 kg cast-metal chassis provides complete vibration-free benchtop stability
Infinity Plan Phase Optics & 5-Position Turret Condenser
Staining often kills live cells or creates confusing precipitation artifacts in cytology preparations. The Plan Phase objectives and multi-annulus turret condenser convert subtle refractive variations into high-contrast grayscale borders, making unstained urinary casts, epithelial cells, and motile bacteria resolve clearly. Rotating the condenser wheel lets technicians toggle between brightfield and matched phase rings instantly without unseating hardware.
Full Köhler Illumination & Scratch-Proof Stage Platform
Setting up true Köhler illumination ensures a uniform, glare-free light field that prevents optical flare when inspecting thick cell preparations. The warm 20W halogen lamp delivers a high-CRI continuous spectrum that renders natural specimen colors faithfully. The oversized ceramic-coated stage resists scratches from abrasive slide edges, while low-drop coaxial XY control stalks keep hand movements relaxed during extended screenings.
- 5-position turret condenser eliminates the hassle of swapping loose phase slider plates
- Warm halogen light engine provides stable, continuous-spectrum illumination for cytology
- Vertical camera channel allows seamless digital video recording and defect archiving
Kern & Sohn Three-Year Laboratory Warranty
Kern & Sohn covers the OBN 158 with a comprehensive three-year factory warranty covering optical elements, stand castings, and mechanical stage drives, backed by two years on electrical halogen circuitry. The complete package contains the OBN quintuple stand frame, phase contrast turret condenser, five infinity objectives, centering telescope eyepiece, pair of WF 10x/20 mm eyepieces, photo port tube, immersion oil flask, power cable, dust cover, and manual.
Kern & Sohn OBN 158 Phase Contrast Trinocular Microscope Infinity Plan/Plan Phase 4x/10x/20x/40x/100x WF10x20 20W Halogen Specs
| Brand | Kern & Sohn |
| Full Model Code / SKU | OBN 158 (Premium Phase Contrast Line) |
| Country of Origin | Germany |
| Microscope Type | Premium Research-Grade Trinocular Phase Contrast and Brightfield Compound Microscope System with Koehler Illumination |
| Optical System Type | Premium Infinity Corrected Optical Pathway Design System (True Flat-Field Alignment) |
| Observation Tube Type | Trinocular Head Unit with professional vertical photo port assembly |
| 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 Phase and Plan Achromatic Balanced Objective Lens Series (Anti-fungus treated, supreme field flatness tracking across all structural phases) |
| Objectives Magnification Breakdown | Infinity premium tracking matrix: 4x/0.10 (Brightfield), 10x/0.25 (Plan Phase), 20x/0.40 (Plan Phase), 40x/0.65 spring-loaded (Plan Phase), and 100x/1.25 spring-loaded oil-immersion (Plan Phase) |
| Total Magnification Range | 40x, 100x, 200x, 400x, and 1000x premium optical phase documentation 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 | Advanced Multi-Position Phase Contrast Turret Condenser (NA 1.25) with centering controls, field diaphragm for true Koehler alignment, integrated wheel containing brightfield position and multiple matched phase annular rings |
| Illumination Transmitted Type | Full Koehler Illumination system utilizing an adjustable 6V 20W Halogen sub-stage module for perfectly centered high-contrast deep-field illumination paths |
| Illumination Epi-EPI/Reflected | None |
| Light Intensity Management | Electronic continuous variable rotary dimmer control wheel on side panel for tracking target brightness |
| 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 | Full-range multi-magnification flat-field phase contrast mapping, true Koehler brightfield screening, high-resolution digital phase documentation logging |
| Power Supply & Voltage Input | Internal universal 100-240V AC stabilization power module line links |
| Physical Dimensions & Net Weight | Base assembly 395 x 200 mm, overall frame height 400 mm, complete assembly net weight approx. 9.5 kg |
| Standard Package Accessories Included | OBN quintuple stand frame, premium phase contrast turret condenser, five infinity objectives (four phase contrast, one brightfield), centering telescope eyepiece, pair of WF 10x/20mm eyepieces, vertical photo channel block, immersion oil flask, power cable, dust cover, manual |
| Primary Application & Environment | High-throughput hematology logging offices, advanced cellular biology research centers, pathology diagnostic reporting stations, clinical target photo archiving lines |
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