SDLATLAS G208A Precision Monocular Microscope

Overview

The SDLATLAS G208A Precision Monocular Microscope is an engineered optical instrument designed for high-fidelity transmitted-light brightfield observation in quality control, textile inspection, materials characterization, and academic microscopy applications. Built on a robust mechanical platform with precise coaxial focusing architecture, it employs standard Köhler illumination principles to deliver uniform, glare-free illumination across the field of view. Its monocular optical path—featuring a 45° inclined eyepiece tube with full 360° rotational capability—enables ergonomic viewing while maintaining optical alignment integrity. The system supports routine metallurgical, fiber, and fabric analysis through standardized DIN-compliant objectives and calibrated magnification steps, making it suitable for laboratories requiring traceable, repeatable visual assessment under controlled lighting conditions.

Key Features

• Monocular head with 45° inclination and continuous 360° rotation for operator flexibility and long-duration usability
• Four-parfocal, DIN-standard objective lenses: 4×, 10×, 40×, and 100× (oil immersion compatible), enabling total magnifications of 40×, 100×, 400×, and 1000× when paired with a 10× wide-field eyepiece
• Coaxial coarse and fine focusing mechanism with 27 mm vertical travel range and 2 µm fine-focus graduation resolution
• Adjustable 12 V / 20 W halogen illuminator with continuously variable brightness control for optimal contrast and specimen preservation
• Reinforced cast-aluminum frame with anti-vibration base and precision-ground stage for dimensional stability during extended imaging sessions
• Standardized 23.2 mm eyepiece tube diameter and RMS-threaded objective mounts for compatibility with third-party accessories including digital eyepiece cameras and measurement reticles

Sample Compatibility & Compliance

The G208A accommodates standard 1″ × 3″ (25 × 76 mm) glass microscope slides and circular cover slips (18–22 mm diameter). Its stage includes dual-axis mechanical controls with vernier-calibrated scales (0.1 mm resolution) for reproducible positioning. The instrument meets ISO 8578:2017 (Microscopes — Requirements and test methods for optical microscopes) for mechanical stability, parfocality, and image centering performance. It supports ASTM D2256 (Standard Test Method for Tensile Properties of Yarns by the Single-Strand Method) and AATCC TM20 (Fiber Analysis by Microscopy) workflows when integrated into textile QA/QC protocols. No electrical safety certifications (e.g., UL/EN 61010-1) are embedded in the base unit; users must verify local regulatory compliance prior to installation in GLP or GMP environments.

Software & Data Management

While the G208A is a standalone optical instrument without built-in digital capture, its optical design is fully compatible with industry-standard C-mount and 23.2 mm adapter interfaces for integration with USB3.0 or GigE monochrome/color CMOS cameras (e.g., Thorlabs DCx series, Edmund Optics EO-2 Series). When coupled with validated imaging software such as NIS-Elements (Nikon), ZEN Blue (Zeiss), or open-source alternatives like ImageJ/Fiji, the system supports quantitative morphological analysis—including fiber diameter distribution, weave pattern mapping, and defect localization—with pixel calibration traceability. Audit trails, user access logs, and image metadata embedding (EXIF + custom fields) can be implemented via host PC software compliant with FDA 21 CFR Part 11 requirements where electronic records are mandated.

Applications

• Textile fiber identification and morphology assessment (natural vs. synthetic, cross-sectional shape, surface pitting, crimp analysis)
• Quality assurance of woven/knitted fabric structures, yarn twist evaluation, and dye penetration uniformity
• Metallurgical grain structure screening (after etching) and inclusion analysis in low-magnification metallography
• Educational demonstration of cellular structures using prepared biological slides (non-live, fixed specimens)
• Failure analysis of polymer films, coated substrates, and composite laminates under brightfield illumination
• Calibration verification of micrometers and gauge blocks using stage micrometer overlays

FAQ

Is oil immersion required for the 100× objective?
Yes—the 100× objective is designed for use with Type A cedarwood oil (refractive index ~1.515) to achieve maximum numerical aperture (NA ≈ 1.25) and resolution at 1000× total magnification.
Can the G208A be adapted for darkfield or phase contrast?
No—the base configuration supports only brightfield illumination. Darkfield condensers or phase contrast sliders require mechanical and optical modifications not supported by the standard G208A chassis.
What is the working distance for each objective?
Approximate working distances: 4× (20.5 mm), 10× (10.5 mm), 40× (0.65 mm), 100× (0.15 mm). Exact values are engraved on each objective barrel per DIN 60001.
Does SDLATLAS provide calibration documentation?
Yes—each unit ships with a Certificate of Conformance referencing ISO/IEC 17025-accredited verification of mechanical alignment, parfocality, and stage movement linearity. Optional NIST-traceable calibration reports are available upon request.
Is the halogen lamp replaceable in the field?
Yes—the 12 V / 20 W halogen bulb is user-replaceable using standard tools; replacement part number is SDL-G208A-LAMP-20W.