XSP-3CA Monocular Biological Microscope

Overview

The XSP-3CA Monocular Biological Microscope is a robust, entry-level upright microscope engineered for routine brightfield observation of fixed and stained biological specimens in academic teaching laboratories, clinical training environments, and quality control settings. It operates on the fundamental principles of transmitted light microscopy, utilizing Köhler illumination geometry to deliver uniform, glare-free illumination across the field of view. The instrument’s optical design centers on achromatic objective lenses corrected for chromatic aberration at two wavelengths (typically 486 nm and 656 nm) and spherical aberration at one wavelength—ensuring consistent image fidelity across the standard magnification range (40×–1600× combined with eyepieces). Its monocular head provides ergonomic stability for extended use, while the rigid cast-metal frame and coaxial coarse/fine focusing mechanism (with 2 mm coarse travel and 0.002 mm fine increment) ensure mechanical reproducibility and long-term alignment retention.

Key Features

• Monocular inclined head (30° tilt) with standardized 23.2 mm eyepiece tube diameter for compatibility with auxiliary imaging adapters
• Achromatic objective set including spring-loaded 40× and 100× objectives—critical for safe engagement with coverslip-mounted specimens and oil-immersion applications
• Abbe condenser (NA 1.25) equipped with an iris diaphragm and centering screws, enabling precise control of numerical aperture and optimal contrast via aperture adjustment
• Dual eyepiece options: wide-field WF10× (18 mm field number) for general survey and Huygens H16× (12 mm field number) for higher-magnification detail assessment
• Integrated 6 V / 20 W halogen illumination system with rheostat-controlled brightness regulation—providing stable color temperature (~2800 K) and minimal thermal drift during prolonged operation
• Sturdy aluminum alloy base with anti-vibration rubber feet and built-in cord management for benchtop stability and electrical safety compliance (IEC 61010-1)

Sample Compatibility & Compliance

The XSP-3CA supports standard glass microscope slides (75 × 25 mm) and coverslips (No. 1.5, 0.17 mm thickness), accommodating histological sections, blood smears, microbial cultures, and botanical tissue preparations. Its 100× oil-immersion objective requires immersion oil (n = 1.515) to achieve effective NA ≥ 1.25 and resolution down to ~0.25 µm (theoretical Rayleigh limit). While not certified for ISO 13485 or FDA 510(k) as a medical device, the microscope conforms to general laboratory equipment safety standards (GB/T 29885–2013 equivalent to IEC 61010-1) and is routinely deployed in GLP-aligned educational and preclinical training workflows where documentation of instrument verification (e.g., magnification calibration, focus repeatability) is maintained per institutional SOPs.

Software & Data Management

As a manual optical instrument without integrated digital capture, the XSP-3CA does not include proprietary software. However, its standardized trinocular port (optional adapter available separately) enables seamless integration with third-party CMOS/CCD cameras (e.g., AmScope MU series, Tucsen cameras) and open-source acquisition platforms such as Micro-Manager or Ocular. Image metadata—including objective magnification, eyepiece type, and illumination intensity—is manually logged to support traceability in student lab reports or internal QC records. For institutions requiring audit-ready documentation, the microscope’s mechanical consistency supports periodic verification protocols aligned with ASTM E2877-21 (Standard Guide for Microscope Calibration).

Applications

• Undergraduate biology and medical technology education: cell morphology identification, mitotic stage analysis, and basic histopathology screening
• Clinical laboratory training: peripheral blood film examination, urine sediment analysis, and Gram staining evaluation
• Botanical and microbiological labs: fungal hyphae observation, algal motility studies, and bacterial colony isolation verification
• Industrial QC in pharmaceutical excipient manufacturing: particle morphology assessment of lactose or microcrystalline cellulose batches
• Field-deployable diagnostics support (when paired with portable power inverters): rapid malaria parasite detection in resource-limited settings

FAQ

Is the 100× objective designed for oil immersion?
Yes—the 100× (S) objective is spring-loaded and optimized for use with standard cedarwood oil (refractive index 1.515); dry use will result in severe spherical aberration and loss of resolution.
Can this microscope be adapted for digital imaging?
Yes—via optional C-mount trinocular attachment; compatible with USB 3.0 cameras supporting 12–20 MP sensors and real-time streaming at ≥30 fps.
What maintenance is required for long-term optical performance?
Annual cleaning of optical surfaces using lens-grade tissue and xylene-free solvent; biannual lubrication of rack-and-pinion focusing gears with silicone-based grease; quarterly verification of condenser centering and filament alignment.
Does it meet international electrical safety standards?
It complies with GB/T 29885–2013, which is technically aligned with IEC 61010-1 for laboratory electrical equipment, including dielectric strength testing and leakage current limits.
Is replacement halogen lighting available globally?
Yes—the GY6.35 base 6 V / 20 W halogen bulb (e.g., Osram HLX 64625 or Philips 7432) is ISO-standardized and widely distributed through scientific equipment suppliers worldwide.