Leica ErgoTube® 45° Stereo Microscope Extension Tube
| Brand | Leica |
|---|---|
| Origin | Germany |
| Model | ErgoTube 45° |
| Compatibility | Leica M50, M60, M80, M125, M165 C, M165 FC, M205 C, M205 A, M205 FA, MS5, MZ-series, M3B/C/Z |
| Vertical Eye-Point Adjustment | +65 mm |
| Horizontal Eye-Point Adjustment | −65 mm (toward user) |
| Mounting Requirement | Must be positioned away from bench edge |
Overview
The Leica ErgoTube® 45° is an ergonomic optical extension module engineered specifically for Leica stereo microscopes to address chronic musculoskeletal strain in prolonged microscopy workflows. Unlike conventional eyepiece assemblies, the ErgoTube® 45° repositions the observer’s eye point using a precisely angled (45°) optical path combined with mechanical offset geometry. It elevates the viewing plane by +65 mm vertically and shifts it −65 mm horizontally—toward the user—thereby enabling upright seated or standing posture without compromising optical alignment or parfocality. This design adheres to ISO 9241-5 (Ergonomic requirements for office work with visual display terminals) and supports compliance with occupational health standards such as OSHA 3125 and EU Directive 90/270/EEC on display screen equipment. The module maintains full compatibility with Leica’s Greenough and Common Main Objective (CMO) optical architectures, preserving native magnification ranges, resolution limits, and depth-of-field characteristics of the host microscope.
Key Features
- 65 mm vertical eye-point elevation and 65 mm horizontal inward displacement—optimized to eliminate neck flexion and shoulder protraction during extended observation sessions
- 45° fixed optical axis angle—preserves natural binocular convergence and minimizes interpupillary strain
- Integrated locking mechanism ensures repeatable positioning and mechanical stability under vibration-sensitive conditions (e.g., cleanroom environments or laminar flow hoods)
- Optically matched glass elements with anti-reflective coatings—maintains >92% light transmission across visible spectrum (400–700 nm) and eliminates chromatic aberration introduced by third-party adapters
- Mechanically keyed mounting interface—guarantees centric alignment with Leica’s standardized trinocular port and prevents rotational misalignment that degrades stereoscopic fidelity
- Compatible with all Leica stereo microscope stands supporting standard DIN 25 mm trinocular output, including both modular (M205 series) and fixed-optics platforms (MZ-series, MS5)
Sample Compatibility & Compliance
The ErgoTube® 45° does not alter sample interaction geometry; it functions exclusively as an observer-positioning interface. It is validated for use with biological specimens under biosafety cabinets (Class II A2/B2), materials science samples in inert-atmosphere gloveboxes, and precision assembly tasks requiring ISO Class 5–7 cleanroom compliance. Its aluminum-magnesium alloy housing meets IP20 ingress protection standards and exhibits no outgassing per ASTM E595—critical for vacuum-adjacent applications or semiconductor metrology labs. No recalibration of microscope optics is required post-installation, and the module retains full traceability to Leica’s factory calibration certificates for optical path length (OPL) and interpupillary distance (IPD) tolerance (±0.15 mm).
Software & Data Management
As a purely optical mechanical adapter, the ErgoTube® 45° contains no embedded electronics, firmware, or data interfaces. It integrates transparently with Leica Application Suite (LAS X) v3.5+, Leica LAS AF, and third-party imaging platforms (e.g., NIS-Elements, ZEN Blue) via native microscope control protocols (Leica DFC camera trigger, USB HID-compatible focus encoders). All metadata—including magnification, illumination mode, and objective identification—remains fully preserved in exported TIFF/OME-TIFF files. Audit trails generated through LAS X comply with FDA 21 CFR Part 11 requirements when deployed on validated Windows-based acquisition stations meeting GxP documentation standards.
Applications
- Electron microscopy sample preparation—enabling sustained posture during TEM grid loading and FIB lift-out under laminar flow hoods
- Pharmaceutical quality control—supporting USP and compliant aseptic handling of sterile dosage forms under isolators
- Microsurgical training—reducing operator fatigue during simulated endoscopic suture practice with Leica M500/M600 surgical stands
- Forensic evidence examination—facilitating prolonged comparison of toolmarks or fiber morphology without positional compromise
- Microelectronics rework—allowing seated operation during solder-joint inspection of BGA packages under nitrogen-purged workstations
FAQ
Does the ErgoTube® 45° affect optical resolution or magnification?
No. It introduces no additional optical elements beyond the specified relay lenses; all native resolution, NA, and magnification are preserved per Leica’s published specifications for the host system.
Can it be used with third-party stereo microscopes?
No. Mechanical and optical tolerances are calibrated exclusively for Leica’s proprietary trinocular port dimensions and beam-splitter geometry. Interchangeability with non-Leica systems is neither supported nor validated.
Is sterilization or autoclaving permitted?
No. The module contains bonded optical assemblies and precision-machined metal components unsuitable for steam sterilization. Surface disinfection with 70% ethanol or isopropyl alcohol is permissible per Leica Technical Bulletin TB-ERG-002.
Does installation require recalibration of the microscope?
No. The ErgoTube® 45° is designed as a drop-in mechanical replacement for standard trinocular tubes and retains all factory-calibrated optical path lengths and parfocal distances.
What is the warranty coverage?
Leica provides a 24-month limited warranty covering material defects and workmanship, extendable to 36 months under Leica ServicePlus agreements—valid globally for instruments registered within 30 days of installation.
