HTMM25.4 Polarizer Mount by HAN DING (HT)

Overview

The HTMM25.4 Polarizer Mount is a precision-engineered optical mounting solution designed for stable, repeatable alignment and rotation of linear polarizers, waveplates, and other polarization-sensitive optical elements in laboratory and research-grade optical setups. Built upon a kinematic three-point contact base with fine-threaded adjustment screws, this mount enables sub-milliradian angular control and maintains mechanical stability under thermal drift and vibration—critical for polarization-dependent measurements such as ellipsometry, Mueller matrix characterization, or laser cavity polarization tuning. Its modular design conforms to standard 25.4 mm (1-inch) optic diameter specifications and integrates seamlessly with industry-standard optical rails, breadboards, and post holders from Thorlabs, Newport, and similar platforms.

Key Features

• High-stability aluminum alloy construction with black anodized finish for enhanced rigidity and corrosion resistance
• 360° continuous rotation with engraved angular scale (1° resolution) and locking mechanism for positional repeatability
• Kinematic base with three M4 threaded adjustment screws (±2° fine-tuning range) for tip/tilt correction
• Centered 25.4 mm clear aperture with spring-loaded retaining ring for secure optic clamping without stress-induced birefringence
• Compatibility with SM1 (1.035″-40) threaded optics carriers and standard Ø1″ lens tubes
• Low-profile footprint (≤32 mm height) optimized for compact multi-element polarization stacks

Sample Compatibility & Compliance

The HTMM25.4 accommodates standard 25.4 mm diameter polarizing elements—including Glan-Taylor, Glan-Laser, and Rochon calcite prisms; polymer-film polarizers (e.g., VIS-NIR broadband); and zero-order quarter- or half-wave plates. It supports optics up to 6 mm thick and tolerates operational temperatures from −10 °C to +60 °C. While not certified to ISO 9001 at the component level, the mount is manufactured in accordance with GB/T 19001–2016 (equivalent to ISO 9001:2015) quality management standards by its OEM supplier in Jiangsu Province. It meets mechanical interoperability requirements defined in ANSI/OPI 1.0–2018 (Optical Mounting Interfaces) for rotational symmetry and concentricity (≤±5 µm radial runout at nominal load).

Software & Data Management

As a passive mechanical mount, the HTMM25.4 does not incorporate electronic actuation or embedded firmware. However, it is fully compatible with motorized rotation stages (e.g., Thorlabs K10CR1 or Zaber T-NA08) when used with optional adapter plates (sold separately). When integrated into automated polarization characterization systems, it supports traceable calibration workflows compliant with GLP and ISO/IEC 17025 guidelines—particularly when paired with calibrated photodetectors and lock-in amplifiers. Angular position data from external encoders can be logged via LabVIEW, Python (PyVISA), or MATLAB interfaces for full audit trail generation in regulated environments (e.g., FDA 21 CFR Part 11–compliant labs conducting optical safety validation).

Applications

• Polarization state generation and analysis in interferometric metrology and coherent imaging systems
• Alignment and stabilization of intracavity polarizers in Ti:sapphire and fiber laser oscillators
• Teaching laboratories for undergraduate optics courses covering Malus’ law, Brewster’s angle, and Jones calculus
• Calibration of Stokes parameter measurement systems using rotating analyzer configurations
• Integration into custom-built Mueller matrix polarimeters for biomedical tissue scattering studies
• Beam conditioning in quantum optics experiments requiring precise polarization eigenstate selection

FAQ

Is the HTMM25.4 compatible with vacuum environments?
No—it is not vacuum-rated due to use of standard lubricants and non-outgassing gasket materials. For UHV applications, consult HT’s custom engineering team for modified versions with dry-lubricated screws and vacuum-compatible anodization.
What is the maximum torque specification for the retaining ring?
The spring-loaded retaining ring is rated for ≤0.3 N·m tightening torque to prevent optic fracture or induced stress birefringence in crystalline polarizers.
Does this mount include angular calibration certification?
Standard units ship without NIST-traceable calibration documentation. Optional third-party angular calibration (±0.25° uncertainty) is available upon request with lead time extension.
Can I mount a 20 mm optic in this holder?
Yes—with the use of a compatible SM1-to-SM05 step-down adapter ring (e.g., Thorlabs SM1A2), though centering accuracy degrades to ±0.15 mm without custom spacers.
Is technical support available for integration into automated optical benches?
Yes—HAN DING provides application engineering support for mechanical integration, including STEP file access, mounting hole pattern drawings, and compatibility guidance for motion controllers and DAQ systems.