English Product Name
| Brand | Hanting (HT) |
|---|---|
| Model | HTRM25 |
| Origin | Jiangsu, China |
| Manufacturer Type | Authorized Distributor |
| Country of Manufacture | China |
| Pricing | Available Upon Request |
Overview
The Hanting HTRM25 Three-Dimensional Filter Holder is a precision optical mounting solution engineered for stable, repeatable, and fine-adjustable positioning of interference filters, dichroic mirrors, neutral density filters, and other planar optical components in research-grade optical setups. Designed around a kinematic three-axis adjustment architecture—comprising independent X-, Y-, and Z-axis translation stages with micrometer-driven actuators—the HTRM25 enables sub-microradian angular alignment and ±5 mm linear displacement per axis. Its core function is to maintain optical element collinearity and normal incidence under thermal and mechanical perturbation, making it suitable for demanding applications such as Raman spectroscopy beam paths, fluorescence microscopy filter cubes, laser cavity mode control, and multi-channel spectral separation systems. Constructed from black-anodized 6061-T6 aluminum alloy, the holder features low thermal expansion, non-magnetic properties, and high dimensional stability over extended operation cycles.
Key Features
- Kinematic three-axis adjustment: Independent X/Y/Z translation via precision 100 µm/rev micrometer screws with engraved scale and locking thumbscrews
- Optical aperture clearance: 25.4 mm (1″) clear bore compatible with standard Ø25.4 mm filters and mounts
- Mounting interface: Standard SM1 (1.035″-40) internal threading on front and rear faces; includes two SM1 retaining rings and one setscrew-compatible adapter plate
- Mechanical stability: Integrated flexure-based baseplate minimizes parasitic tilt during axial translation; total runout < 5 µm over full travel range
- Modular integration: Compatible with Thorlabs, Newport, and OptoSigma rail systems via optional adapter plates (sold separately)
- Surface finish: Hard-anodized matte black coating (Ra < 0.8 µm) to suppress stray light and improve absorption of scattered photons
Sample Compatibility & Compliance
The HTRM25 accommodates plano-optical elements up to 3.0 mm thickness and 25.4 mm diameter, including hard-coated bandpass filters (e.g., Semrock FF01 series), edge filters, and pellicle beamsplitters. It supports both transmission and reflection configurations without requiring reconfiguration of the adjustment mechanism. The design conforms to ISO 10110-7 (optical component mounting tolerances) and aligns with GLP-compliant optical alignment workflows in regulated environments. While not certified to FDA 21 CFR Part 11 or IEC 61000-4 electromagnetic immunity standards, its passive mechanical architecture ensures zero electronic interference—critical in ultra-low-noise photodetection setups and quantum optics experiments where EMI-induced baseline drift must be eliminated.
Software & Data Management
As a purely mechanical mount, the HTRM25 requires no firmware, drivers, or software integration. Alignment parameters are recorded manually or via external metrology tools (e.g., autocollimators, position-sensitive detectors). For traceable calibration documentation, users may log positional settings using standardized lab notebooks compliant with ISO/IEC 17025 requirements. When deployed in automated optical benches (e.g., those controlled by LabVIEW or Python-based motion controllers), the HTRM25 can be paired with motorized micrometers (e.g., Thorlabs K10CR1/M) to enable programmable filter selection—though motorization is an external upgrade and not part of the base unit.
Applications
- Raman spectrometer excitation and emission filtering, especially in confocal micro-Raman platforms requiring precise filter angle tuning to reject Rayleigh scatter
- Multi-spectral imaging systems where sequential bandpass filter insertion demands micron-level repeatability across wavelength channels
- Laser cavity intra-cavity diagnostics, including intracavity etalon alignment and harmonic separation optics stabilization
- Teaching laboratories implementing undergraduate optics curricula (e.g., Michelson interferometry, polarization analysis, or fluorescence lifetime measurement setups)
- Environmental sensor development involving UV-VIS-NIR spectral discrimination for water quality or gas-phase absorption monitoring
FAQ
Is the HTRM25 compatible with vacuum environments?
No—the standard version uses lubricated micrometer threads and polymer O-rings unsuitable for UHV or HV conditions. A vacuum-compatible variant (HTRM25-VAC) with dry-running stainless-steel leadscrews and metal-sealed housing is available upon request.
Can it hold tilted filters at fixed angles?
Yes—by decoupling X/Y/Z adjustments, users can induce controlled wedge angles up to ±2° with angular resolution of ~0.01°, provided the filter substrate thickness remains within tolerance limits.
Does it support motorized actuation natively?
No—motorization requires third-party stepper/servo micrometer attachments; the HTRM25 itself contains no embedded electronics or communication interfaces.
What is the maximum recommended filter weight?
For optimal repeatability and long-term thread integrity, filters exceeding 15 g should be secured using supplemental adhesive bonding or auxiliary clamping fixtures.
Are custom aperture sizes available?
Yes—Hanting offers OEM modifications including Ø30 mm, Ø50 mm, and rectangular 25 × 36 mm variants under NRE agreement; lead time typically 8–12 weeks.
