HTFM-U Filter Mount with Adjustable Thickness Clamping (1.5–12 mm)
| Brand | Han Ding / HT |
|---|---|
| Origin | Jiangsu, China |
| Manufacturer Type | Authorized Distributor |
| Regional Classification | Domestic (China) |
| Model | HTFM-U |
| Pricing | Upon Request |
Overview
The HTFM-U Filter Mount is a precision-engineered optical mounting solution designed for secure, repeatable, and alignment-stable positioning of interference filters, neutral density filters, dichroic mirrors, and other planar optical components in laboratory and industrial optical setups. Engineered for compatibility with standard optomechanical breadboards and rail systems, this mount employs a dual-spring-loaded clamping mechanism to accommodate filter substrates ranging from 1.5 mm to 12 mm in thickness—covering common fused silica, BK7, CaF₂, and coated glass substrates used across UV–VIS–NIR spectral ranges. Its compact footprint (60 mm × 40 mm base) minimizes spatial footprint without compromising mechanical rigidity, making it suitable for dense multi-element optical paths, including laser cavity alignment, spectroscopic beam conditioning, fluorescence filter cubes, and hyperspectral imaging assemblies.
Key Features
- Adjustable clamping range: 1.5–12 mm substrate thickness, accommodated via calibrated spring-loaded lateral arms with knurled thumb screws for fine-tuning retention force.
- Optimized kinematic design: Three-point contact geometry ensures minimal stress-induced birefringence or surface distortion on mounted optics—critical for polarization-sensitive and high-precision interferometric applications.
- Black-anodized aluminum construction (6061-T6): Provides thermal stability (CTE ≈ 23.6 µm/m·K), corrosion resistance, and non-magnetic performance compatible with MRI-adjacent or ultra-high-vacuum (UHV)-compatible auxiliary stages.
- Standard M4 threaded holes on base plate: Enables direct integration with Thorlabs, Newport, or Standa-compatible posts, translation stages, and rotation mounts using industry-standard hardware.
- No-tool quick-release capability: Spring-assisted lever action allows sub-second filter exchange while maintaining angular repeatability within ±0.05° under repeated loading cycles.
Sample Compatibility & Compliance
The HTFM-U supports flat, rigid optical elements with parallel surfaces and edge tolerances conforming to ISO 10110-7 (surface form deviation ≤ λ/4 @ 633 nm) and ISO 10110-3 (edge chip depth ≤ 0.1 mm). Compatible with filters up to Ø50 mm diameter or rectangular formats up to 50 mm × 50 mm. Not intended for curved, wedged, or soft-coated substrates (e.g., polymer-based filters). Meets general laboratory safety requirements per IEC 61000-6-2 (immunity) and IEC 61000-6-3 (emissions) when integrated into compliant optical tables. No CE or FDA certification required, as it is a passive mechanical component—not an active optical instrument or medical device.
Software & Data Management
As a purely mechanical mounting accessory, the HTFM-U requires no firmware, drivers, or software integration. However, its dimensional repeatability and mounting consistency support traceable optical alignment workflows in environments governed by ISO/IEC 17025 or GLP-compliant laboratories. When used in conjunction with motorized filter wheels or automated spectrometer systems (e.g., Ocean Insight USB2000+, Hamamatsu C12880MA), the HTFM-U serves as a stable reference platform for calibration verification protocols—enabling documented positional reproducibility across maintenance intervals. Alignment records may be logged manually or imported into LabArchives or Benchling ELN platforms via standardized metadata fields (e.g., “Mount ID”, “Filter Lot #”, “Clamp Torque Setting”).
Applications
- Laser line cleanup in Ti:sapphire or DPSS laser systems requiring precise bandpass filter staging.
- Multi-channel fluorescence microscopy setups where rapid, angle-consistent filter swapping between excitation/emission bands is essential.
- Portable Raman spectrometers integrating custom notch or edge filters for background suppression.
- Teaching labs utilizing Meos or PASCO optical kits for wave optics experiments involving spectral filtering and polarization analysis.
- Environmental monitoring sensors employing UV absorption or NIR reflectance, where long-term mechanical drift must be minimized across thermal cycling (−10 °C to +50 °C).
FAQ
What is the maximum recommended torque for the clamping screws?
Do not exceed 0.3 N·m; over-torquing may deform the spring arms or damage filter edges.
Can the HTFM-U be used in vacuum environments?
Yes—when assembled with stainless steel fasteners and outgassed at <10⁻⁵ mbar, it is compatible with UHV-compatible optical benches (consult vacuum compatibility report upon request).
Is angular adjustment possible after mounting?
No—this is a fixed-orientation mount. For tip/tilt control, pair with a kinematic mirror mount (e.g., KM100) or goniometer stage.
Does the mount introduce measurable stress birefringence in fused silica filters?
Independent testing shows retardance <5 nm @ 633 nm for 3-mm-thick fused silica filters clamped at mid-range compression—within acceptable limits for most polarimetric applications.
Are replacement springs available?
Yes—part number HTFM-U-SPR-KIT includes two calibrated NiTi alloy springs rated for >10⁴ actuation cycles.
