HT HTLB90-02 Right-Angle Mounting Block for Precision Optical Alignment
| Brand | HT |
|---|---|
| Model | HTLB90-02 |
| Origin | Jilin, China |
| Mounting Configuration | Orthogonal Dual-Surface Rigid Block |
| Surface Perpendicularity | Precision-Machined to ≤ 15 arcsec Deviation |
| Mounting Hole Pattern | Standard M4 and 1/4"-20 Tapped Holes on Both Faces |
| Material | Anodized 6061-T6 Aluminum Alloy |
| Weight | ~185 g |
| Compatibility | Integrates with Standard 30 mm and 50 mm Cage Systems, Linear Stages, and Kinematic Mounts |
Overview
The HT HTLB90-02 Right-Angle Mounting Block is an engineered mechanical interface component designed for high-fidelity spatial registration in optical laboratory setups. It functions as a rigid, orthogonal coupling element that enables the deterministic assembly of linear translation stages, rotation mounts, or cage-based optical subsystems into two-dimensional (X–Y) or three-dimensional (X–Y–Z) kinematic configurations. Constructed from stress-relieved 6061-T6 aluminum and finished with hard-anodized surface treatment (Type II, 25–30 µm thickness), the block provides dimensional stability under thermal cycling and mechanical load while resisting wear during repeated reconfiguration. Its core functionality relies on geometric fidelity: both mounting surfaces are precision-milled and lapped to achieve ≤ 15 arcseconds of angular deviation relative to the theoretical 90° orthogonality—meeting specification thresholds required for alignment-critical applications such as interferometric beam combining, multi-axis laser steering, and collimated optical path stacking.
Key Features
- Precision orthogonal geometry: Dual reference faces machined and verified via coordinate measuring machine (CMM) to ensure traceable perpendicularity compliance per ISO 1101
- Universal mechanical compatibility: Pre-tapped M4 (metric) and 1/4″-20 (imperial) threaded holes on both faces support integration with standard optical rails, breadboards, translation stages, and cage systems (e.g., Thorlabs 30 mm and 50 mm)
- Thermally stable platform: 6061-T6 aluminum base material exhibits low coefficient of thermal expansion (23.6 × 10⁻⁶ /°C) and high yield strength (276 MPa), minimizing drift during ambient fluctuations
- Surface durability: Hard-anodized finish (Rockwell hardness ~60 HR15Y) resists scratching and corrosion without compromising electrical insulation properties
- Low-profile architecture: Compact footprint (90 mm × 90 mm × 25 mm) preserves optical access and reduces moment arm effects in stacked assemblies
Sample Compatibility & Compliance
The HTLB90-02 is not a measurement device and therefore does not require calibration certification or metrological traceability. However, its mechanical performance conforms to widely adopted laboratory infrastructure standards. The tapped hole pattern aligns with ANSI/BHMA A156.13 (for threaded fastener spacing) and DIN 316 (for metric thread tolerances). As a passive mounting component, it complies with RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006 regarding restricted substances. It is routinely deployed in setups adhering to ISO/IEC 17025-accredited laboratories where mechanical reproducibility—rather than active sensing—is subject to documented verification protocols.
Software & Data Management
This is a purely mechanical mounting component with no embedded electronics, firmware, or software interface. No drivers, configuration utilities, or data logging capabilities are associated with the HTLB90-02. Integration into automated optical alignment workflows (e.g., those using LabVIEW, Python-controlled motorized stages, or MATLAB-based alignment algorithms) occurs solely at the mechanical interconnection level—via physical linkage to compatible actuators or positioners. Documentation includes dimensional drawings (PDF and STEP format) compliant with ASME Y14.5–2018 geometric dimensioning and tolerancing (GD&T) conventions.
Applications
- Construction of orthogonal XY translation platforms for laser beam positioning in spectroscopy and microscopy
- Mounting of fiber launch optics perpendicular to free-space paths in quantum optics experiments
- Rigid interconnection between gimbal-mounted mirrors and motorized rotation stages in adaptive optics testbeds
- Stabilization of dual-detector arrays in differential absorption lidar (DIAL) receiver modules
- Assembly of compact, modular optical benches for undergraduate physics teaching labs requiring repeatable, tool-free reconfiguration
FAQ
Is the HTLB90-02 compatible with Thorlabs’ 30 mm cage system?
Yes—the block features standardized M4 threaded holes spaced at 30 mm intervals on one face, enabling direct attachment to SM30-series cage plates and rods.
What is the maximum recommended torque for the M4 mounting screws?
For optimal thread integrity and surface flatness retention, apply torque within 0.5–0.7 N·m (4.4–6.2 in·lb) using a calibrated torque screwdriver.
Can this mount be used in vacuum environments?
While the base material is vacuum-compatible, the anodized layer may outgas under high vacuum (<10⁻⁵ mbar); users requiring UHV operation should specify bare aluminum or electropolished variants.
Does HT provide GD&T inspection reports for individual units?
Standard delivery includes general conformity documentation; full CMM inspection reports with feature-specific deviations are available upon request with additional lead time and cost.
Are custom hole patterns or material substitutions (e.g., stainless steel) offered?
Yes—HT supports OEM mechanical customization including alternate alloys (e.g., 303 SS or Invar 36), non-standard threading, and laser-etched serial numbering for asset tracking.
