Yoke XSP-10CA Trinocular Biological Microscope

Overview

The Yoke XSP-10CA Trinocular Biological Microscope is an optomechanically integrated upright microscope engineered for routine and advanced light microscopy in academic laboratories, pharmaceutical quality control units, and clinical research settings. It operates on the principle of transmitted brightfield illumination, leveraging Köhler illumination geometry to deliver uniform, glare-free specimen illumination across the full field of view. Its trinocular optical path—featuring a fixed 20:80 beam splitter—enables simultaneous visual observation and high-fidelity digital image acquisition without optical realignment. Designed for long-term stability and ergonomic operation, the instrument incorporates a rigid cast-aluminum frame, anti-mold optical coatings, and precision-ground achromatic objectives that meet ISO 10934-1 specifications for chromatic and spherical aberration correction. The microscope supports both live-cell observation and fixed-tissue analysis, making it suitable for applications ranging from basic histology training to preliminary cytological screening.

Key Features

• Trinocular head with 20° inclination and 360° rotatable phototube—optimized for extended operator comfort and seamless integration with DSLR or scientific CMOS cameras
• Abbe condenser (NA 1.25) with calibrated iris diaphragm and centering screws, enabling precise control of contrast and depth of field in accordance with ASTM E2822 guidelines for microscope alignment
• Dual illumination options: energy-efficient 3W white LED (50,000-hour lifespan, color temperature ~5500 K) or replaceable 6V/20W halogen lamp with integrated voltage regulator for stable intensity output
• Coaxial coarse/fine focusing mechanism with 2 µm fine-focus graduation—designed to minimize parfocal drift during high-magnification oil-immersion work (e.g., 100X objective)
• Reinforced mechanical stage with engraved scale, low-friction linear bearings, and dual-axis vernier calipers for repeatable specimen positioning
• Optical train compliant with DIN 232 standard (160 mm mechanical tube length), ensuring compatibility with third-party accessories including phase contrast sliders, polarizing kits, and fluorescence cubes (with external light source)

Sample Compatibility & Compliance

The XSP-10CA accommodates standard glass microscope slides (75 × 25 mm) and coverslips (No. 1.5, 0.17 mm thickness), supporting both wet-mount preparations and permanent resin-embedded sections. Its working distance at 40X (0.65 mm) and 100X (0.11 mm) objectives permits safe manipulation of live specimens under immersion oil (Type A, n = 1.515). All optical components are sealed against dust and humidity per IP42 classification. The instrument conforms to IEC 61010-1:2010 safety requirements for laboratory electrical equipment and carries CE marking for use within the European Economic Area. While not classified as a medical device under FDA 21 CFR Part 807, it meets GLP-relevant design criteria—including traceable calibration documentation, stable illumination output, and reproducible magnification fidelity—for inclusion in regulated QC workflows.

Software & Data Management

The microscope itself is hardware-only; however, its C-mount adapter (1× magnification, 23.2 mm flange distance) ensures native compatibility with industry-standard imaging platforms including ToupView, Ocular, and MicroManager (open-source). When paired with compliant USB3.0 cameras, the system supports time-lapse capture, Z-stacking, and multi-channel overlay—functions validated under ISO/IEC 17025-accredited imaging protocols. Audit trail functionality (user log, timestamped acquisition metadata, exposure parameter logging) is fully enabled when used with FDA 21 CFR Part 11-compliant software suites. Firmware updates for connected cameras are managed externally; no embedded OS or proprietary cloud dependency exists.

Applications

• Routine hematology and microbiology: identification and morphological assessment of blood smears, Gram-stained bacteria, and fungal hyphae
• Pharmaceutical raw material inspection: particulate analysis in excipient powders and dissolution testing residues
• Botanical and zoological education: vascular tissue sectioning, insect wing venation studies, and protozoan motility assays
• Quality assurance in biomanufacturing: verification of cell monolayer confluence prior to passaging or transfection
• Preclinical toxicology support: preliminary evaluation of liver/kidney tissue architecture in rodent histology sections

FAQ

Is the XSP-10CA compatible with fluorescence imaging?
Yes—when equipped with an external epi-illuminator and appropriate filter sets (e.g., FITC/TRITC/Cy5), the microscope supports widefield fluorescence observation. No built-in fluorescence excitation source is included.
What is the maximum usable magnification with the 100X objective?
With standard 10X eyepieces and optimal Köhler alignment, the theoretical maximum useful magnification is 1000×. Digital magnification beyond this limit yields no additional structural resolution due to diffraction constraints (Abbe limit ≈ 0.2 µm at 550 nm wavelength).
Does the microscope include calibration certification?
A factory-verified stage micrometer certificate (traceable to NIM, China) is provided with each unit. Objective magnification accuracy is verified to ±2.5% per ISO 8578.
Can the LED illumination be dimmed continuously?
Yes—the integrated rotary intensity controller provides linear 0–100% brightness adjustment without flicker or color shift, maintaining CCT stability within ±150 K across the full range.
Is service support available outside mainland China?
Yoke maintains authorized service partners in Germany, Poland, and the United States. Spare parts—including condenser lenses, LED modules, and focusing gears—are stocked and distributed under ISO 13485-certified logistics channels.