Yoke XSP-2CA Dual-Eyepiece Electric Illumination Biological Microscope

Overview

The Yoke XSP-2CA Dual-Eyepiece Electric Illumination Biological Microscope is a precision-engineered optical instrument designed for routine and advanced light microscopy applications in academic laboratories, pharmaceutical quality control units, and clinical research settings. Built upon the standardized 160 mm mechanical tube length convention, it adheres to classical Köhler illumination principles and supports both brightfield and oil-immersion observation modes. Its achromatic objective lens set—comprising 4×, 10×, 40×, and 100× magnifications with calibrated numerical apertures (0.10 to 1.25)—ensures consistent chromatic and spherical aberration correction across the visible spectrum (400–700 nm). The microscope employs a fixed-voltage halogen lamp (6 V / 20 W) powered through an integrated 220 V AC transformer, delivering stable, flicker-free illumination suitable for extended visual inspection and basic photodocumentation workflows.

Key Features

• Robust cast-aluminum frame with ergonomic binocular head rotation (360°) and 30° inclined eyetubes for operator comfort during prolonged use.
• Interpupillary distance adjustment range of 55–75 mm accommodates diverse user anthropometry without requiring accessory modifications.
• Abbe condenser (NA 1.25) with dual-function iris diaphragm and removable color filters enables precise control of contrast, depth of field, and illumination uniformity—critical for optimizing resolution in stained and unstained specimens.
• Coaxial coarse/fine focusing mechanism with 15 mm total travel and 0.002 mm fine-focus graduation ensures reproducible Z-axis positioning for serial section analysis and comparative morphology studies.
• Large mechanical stage (125 × 120 mm) with calibrated X–Y translation (70 × 30 mm range) and 0.1 mm vernier scale facilitates accurate specimen repositioning and grid-based mapping of tissue sections or microbial colonies.
• Spring-loaded 100× oil-immersion objective minimizes risk of lens or coverslip damage during high-magnification alignment, supporting compliance with standard histopathological and bacteriological protocols.

Sample Compatibility & Compliance

The XSP-2CA is optimized for transmitted-light observation of fixed and live biological specimens mounted on standard 1 mm-thick glass slides (76 × 26 mm), including hematoxylin–eosin (H&E)-stained tissue sections, Gram-stained bacterial smears, blood films, and unstained protozoan cultures. Its optical design conforms to ISO 8578:2017 (Microscopes — Requirements for biological microscopes) and supports adherence to CLSI EP17-A2 (Evaluation of Detection Capability) when used with validated staining procedures. While not certified for GMP-regulated production environments, its mechanical stability, repeatable focusing, and traceable calibration markings make it suitable for GLP-compliant educational labs and preclinical research facilities operating under internal SOPs aligned with ISO/IEC 17025 guidance.

Software & Data Management

The XSP-2CA operates as a standalone optical platform without proprietary digital imaging integration. However, it is fully compatible with third-party USB CMOS cameras (e.g., AmScope MU1403, Tucsen ICX41) via standard C-mount (0.5× reduction adapter included). When paired with open-source image acquisition software such as MicroManager 2.0 or commercial packages like NIS-Elements BR (Nikon) or ZEN Blue (Zeiss), users can perform basic measurement (length, area), annotation, time-lapse capture, and export TIFF/PNG sequences compliant with FAIR data principles. No embedded firmware or cloud connectivity is present; all data remains under local user control—supporting institutional IT security policies and audit readiness per FDA 21 CFR Part 11 when coupled with validated workstation configurations.

Applications

• Undergraduate and graduate-level instruction in cell biology, microbiology, and histology—particularly where cost-effective, maintenance-light instrumentation is prioritized.
• Routine QC screening of raw botanical materials in herbal medicine manufacturing, per Chinese Pharmacopoeia (ChP) Section IV general monographs.
• Antibiotic susceptibility testing via disk diffusion assays (CLSI M02-A13), leveraging consistent 100× oil-immersion resolution for colony edge morphology assessment.
• Quality assurance of culture media sterility and contamination checks in biotechnology process development labs.
• Field-deployable microscopy support in resource-constrained public health laboratories conducting malaria parasite identification (Plasmodium spp.) in Giemsa-stained thin blood films.

FAQ

Is the XSP-2CA compatible with digital camera systems?
Yes—equipped with a standard 23.2 mm C-mount port and includes a 0.5× reduction lens for optimal sensor coverage with common 1/2″ or 1/3″ CMOS modules.
Does the microscope support phase contrast or fluorescence observation?
No—this model is configured exclusively for brightfield and oil-immersion brightfield imaging. Phase contrast and fluorescence require additional components (annuli, sliders, excitation filters) not supplied or supported by the base configuration.
What is the warranty and service support structure outside China?
Yoke provides a 12-month limited warranty covering material and workmanship defects. International end-users are directed to authorized regional distributors for technical support, spare parts fulfillment, and calibration verification services.
Can the halogen lamp be replaced with an LED module?
Not without mechanical and electrical modification—the lamp housing, power supply, and heat dissipation design are engineered specifically for 6 V / 20 W halogen operation. LED retrofitting is not recommended due to potential thermal and color temperature mismatch risks.
Is the 160 mm tube length compatible with modern infinity-corrected objectives?
No—the XSP-2CA follows finite-conjugate optics architecture. Infinity-corrected objectives require tube lenses and are mechanically and optically incompatible with this platform.