I. Product Overview
The ABN BHP is a popular polarizing microscope designed for teaching and routine inspection. It is equipped with stress-free professional polarizing plan objectives and a Köhler illumination system, with a magnification range of 40–600X manufactured by Sunny Optical. The observation head tilts at 30° with adjustable interpupillary distance. It features a built-in Bertrand lens (adjustable center/focal length) and a 360° rotatable analyzer plate (1° graduation, 6′ accuracy). The 160mm graphite-coated stage can rotate 360° with locking function and is wear-resistant and anti-corrosive. Coaxial coarse and fine focusing with multiple limit protections safeguards specimens and objectives, supplied by Sunny Optical. It is compatible with binocular, trinocular and digital observation tubes. The trinocular light splitting ratio is 80%:20%, supporting image capture and analysis. It is widely applied in geological mineral identification, material crystal analysis, textile fiber inspection, glass and ceramic quality testing, biomedical crystal observation, university teaching and other fields. As an entry-level polarizing microscope fitted with stress-free professional polarizing plan objectives, it is extensively used for compositional analysis and identification of various mineral specimens and their thin sections via polarized light.
II. Equipment Specifications
| Category | Parameter Details |
|---|
| optical system | Finite-distance stress-relief flat-field optical system |
| Observation tube | 30° tilted hinged binocular / trinocular (80%:20% light splitting ratio), adjustable interpupillary distance, monocular diopter ±5 D |
| eyepiece | High eyepoint wide-field flat-field eyepiece PL10X/18mm, crosshair / reticle eyepiece optional |
| objective lens | Stress-Relief Flat-Field Objective Lens：4X/NA0.10/WD15.09mm、10X/NA0.25/WD1.52mm、20X/NA0.40/WD8.72mm、40XS/NA0.65/WD0.5mm、60XS/NA0.85/WD0.3mm |
| Polarizing component | Polarizer, 360° rotation; plug-in analyzer, 360° rotation (graduation value 1°, accuracy 6′); built-in Bertrand lens (adjustable center/focal length), compensator slot (λ plate / λ/4 plate / quartz wedge) |
| Stage | 160mm Metal platform, 360° rotation, scale value 1°, accuracy 6′, with locking device and micrometer（0.01mm） |
| Focusing mechanism | Coarse-fine coaxial, coarse travel 28mm, fine adjustment accuracy 0.002mm, with tension adjustment and multiple limit stops |
| 照明系统 | Köhler illumination, 12V/50W halogen lamp, adjustable brightness, wide voltage 90V-240V |
Body dimensions| Approx. 420×300×480mm, weight approx. 7.5kg |
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III. Functional Features
Stress-free optics and efficient conoscopic observation: Stress-free plan objective lens, nearly dark field under crossed polarizers to improve polarization contrast; built-in Bertrand lens with handle rotation and cyclic focusing for easier conoscopic interference observation.
Large stage and stable operation: 160mm graphite-coated stage, 360° rotatable with locking function, wear-resistant and anti-corrosive, equipped with slide holder and micrometer (0.01mm).
Comfortable observation and safety protection: 30° inclined observation head with adjustable interpupillary distance; high-eye-point eyepieces suitable for spectacle wearers; coaxial coarse and fine focusing with tension adjustment, upper limit and random limit to prevent collision.
Köhler illumination and wide voltage adaptation: Adaptive wide voltage (90V-240V), 12V/50W halogen lamp with adjustable center, optimized condenser system for high light source efficiency and long service life.
Digital compatibility and data management: Trinocular tube with 80%:20% light splitting ratio, compatible with digital modules, supporting image capture, measurement and archiving to meet teaching and general scientific research requirements.
IV. Application Scenarios and Fields
Geology and Minerals: Thin section identification of rocks, analysis of mineral crystal orientation and interference color, assisting in deposit exploration and teaching
Materials Science: Observation of polymer crystals, stress detection of glass and ceramics, birefringence analysis of plastic fibers
Textile Quality Inspection: Identification of fiber birefringence, orientation measurement, distinguishing natural fibers from chemical fibers
Biomedicine: Observation of starch grains, collagen and uric acid crystals, supporting disease diagnosis and teaching
Industrial Quality Inspection: Stress testing of glass, ceramics and liquid crystal materials to guarantee product performance
University Teaching: Polarized light practical training for geology/materials/biology majors to cultivate crystallography and material analysis capabilities
V. Technical Advantages
Stress-relieved Optics: The objective lens eliminates stress from multiple links; the full field of view under crossed polarizers is nearly dark, improving polarized light contrast and measurement accuracy.
Convenient Conoscopic Observation: Built-in Bertrand lens, compensator slot and handle rotation enable efficient observation of conoscopic interference patterns, suitable for teaching and general scientific research.
Safe and Comfortable Operation: Multiple limit protections safeguard samples and objective lenses; high-eyepoint eyepieces with wide pupil distance reduce fatigue during long-time observation.
Durability and Easy Maintenance: Graphite-coated stage features wear and corrosion resistance; Köhler illumination supports wide voltage range, and halogen lamps have long service life, ideal for frequent teaching use.
Digital Compatibility and Cost Balance: The trinocular light splitting ratio adapts to digital modules to meet data collection requirements. It is cost-effective and suitable for bulk procurement in teaching.
Equipment appearance drawing
