ZOLIX OMHS Series Three-Axis High-Stability Optical Mounts

Overview

The ZOLIX OMHS Series Three-Axis High-Stability Optical Mounts are precision-engineered mechanical positioning platforms designed for demanding optical alignment tasks in research laboratories, metrology setups, and industrial laser systems. These mounts operate on the principle of orthogonal micrometer-driven translation—employing three mutually perpendicular fine-pitch threaded actuators to enable independent, sub-microradian angular and sub-micron linear adjustment of optical components. Unlike standard two-axis kinematic mounts, the OMHS architecture integrates an additional axial degree of freedom without compromising structural rigidity, achieving long-term positional retention under thermal drift and mechanical vibration. The design adheres to fundamental principles of elastic deformation control and preload-optimized thread engagement, ensuring minimal hysteresis and high repeatability (< ±1.5 arcsec over 100 cycles) across the full adjustment range. Each unit is assembled and calibrated in a temperature-stabilized cleanroom environment to meet ISO 10110–7 surface-mounting tolerances.

Key Features

• Three orthogonal adjustment axes with fine-pitch stainless steel threaded actuators (pitch: 0.25 mm), delivering resolution down to 0.5 µm per graduation and angular sensitivity better than 2 arcsec per 10 µm lateral displacement
• Modular dimension scalability: standardized aperture compatibility across 12.7 mm (½″), 25.4 mm (1″), and 50.8 mm (2″) optical clear apertures—each size engineered with matched moment-of-inertia ratios to maintain consistent dynamic stiffness
• Multiple mounting interface options per size: closed-type set-screw (standard), open-type set-screw (–B variant), and retaining-ring clamping (–C variant), each optimized for specific optic thickness, coating fragility, and vacuum compatibility requirements
• Dual locking configurations: non-locking (standard) for rapid iterative alignment; integrated friction-based locking mechanism (–S variant) with dual-point torque stabilization to prevent creep during extended operation or transport
• Monolithic aluminum alloy (6061-T6) base structure with anodized hard-coat finish (Type II, 25 µm thickness) for enhanced corrosion resistance and dimensional stability across –10 °C to +50 °C ambient ranges

Sample Compatibility & Compliance

The OMHS series accommodates plano and wedged optics—including metallic-dielectric mirrors (e.g., protected Al, UV-enhanced Al, broadband dielectric coatings), fused silica windows, and laser-grade lenses—with diameters ranging from Ø12.7 mm to Ø50.8 mm and thicknesses up to 12 mm. All variants comply with ISO 9001:2015 manufacturing protocols and meet mechanical interface specifications outlined in ISO 10110–1 (optical element drawing standards). The –C (retaining-ring) configuration satisfies UHV-compatible assembly requirements per ISO 14644–1 Class 5 cleanroom handling guidelines when used with fluoropolymer-coated rings. No adhesives or epoxy bonding is required; all adjustments remain fully reversible and traceable per GLP documentation practices.

Software & Data Management

While inherently manual and analog in operation, the OMHS mount series supports digital integration via optional encoder-equipped actuator kits (sold separately), enabling position feedback to third-party motion controllers (e.g., Thorlabs Kinesis, Newport Motion Control Suite). Calibration certificates include serial-numbered traceability to NIM (National Institute of Metrology, China) reference standards. Adjustment logs may be recorded in laboratory information management systems (LIMS) compliant with FDA 21 CFR Part 11 when paired with audit-trail-enabled controller firmware. Mechanical zero-point referencing is implemented via engraved datum marks on all base plates, facilitating repeatable setup restoration across experimental campaigns.

Applications

• Precision beam steering and collimation in ultrafast laser cavities and Ti:sapphire oscillator alignment
• Multi-element interferometer alignment (e.g., Mach–Zehnder, Michelson) requiring simultaneous pitch/yaw/translation decoupling
• Optical cavity mirror stabilization in gravitational wave detector prototype test benches
• Alignment of fiber-coupled photonic integrated circuits (PICs) where sub-µrad angular error directly impacts coupling efficiency
• Mounting of reference optics in coordinate measuring machine (CMM) calibration artifacts and laser tracker target arrays

FAQ

Can OMHS mounts be used in vacuum environments?
Yes—the –B (open set-screw) and –C (retaining-ring) variants are compatible with medium vacuum (10⁻³ mbar); for UHV applications (<10⁻⁷ mbar), specify fluoropolymer-coated screws and vacuum-rated anodization.
Is thermal expansion compensated in the design?
No active compensation is included, but the monolithic aluminum construction and symmetric load paths minimize differential expansion effects; typical drift is <0.8 arcsec/°C over the central 30 mm travel range.
Are replacement parts available for worn threads or damaged locking mechanisms?
Yes—ZOLIX provides certified replacement actuator assemblies, locking sleeves, and custom-machined retaining rings with NIST-traceable calibration reports.
Do OMHS mounts support motorized actuation?
Standard units are manual-only, but the ¼″–80 UNF threaded input accepts industry-standard stepper motor couplers (e.g., Parker Compumotor 300-series); OEM integration kits are available upon request.
What is the maximum recommended optic weight per mount size?
12.7 mm: 0.3 kg | 25.4 mm: 0.8 kg | 50.8 mm: 2.2 kg—exceeding these limits may degrade angular repeatability beyond ±3 arcsec.