HTVH-01 Adjustable Height Optical Post Holder

Overview

The HTVH-01 Adjustable Height Optical Post Holder is a precision-engineered mechanical mounting solution designed for stable, repeatable vertical positioning of optical components in laboratory and industrial alignment setups. Based on the Couette-type coaxial elevation principle—where height adjustment is achieved via a finely threaded stainless steel lift shaft engaged with a hardened brass nut—the device delivers sub-microradian angular stability during vertical translation. Unlike cantilevered or pivot-based mounts, the HTVH-01 maintains fixed azimuthal orientation and collimation axis integrity across its full 15 mm travel range (70–85 mm total height), making it suitable for interferometric alignment, laser beam path stabilization, and multi-axis optomechanical integration where phase-preserving height tuning is critical.

Key Features

• Bi-directional locking mechanism: Independent knurled thumbscrews secure both the main support rod (M6 thread interface) and the internal elevation shaft, eliminating drift under static load up to 2.5 kg.
• Micrometer-grade elevation thread: 0.25 mm pitch precision-ground brass-on-stainless thread enables tactile, backlash-free height increments with ±2 µm repeatability over repeated cycles.
• Constant-phase-height design: The coaxial lift architecture ensures that rotational symmetry about the central axis remains invariant during vertical adjustment—critical when aligning waveplates, polarizers, or fiber collimators requiring fixed angular registration.
• Standardized 12.5 mm bore: Accepts all HTR-series Ø12.7 mm (1/2″) posts with ±5 µm concentricity tolerance; compatible with Thorlabs SM1-threaded accessories via optional adapter rings.
• Integrated neodymium N52 magnetic base: Provides >45 N holding force on ferromagnetic surfaces (e.g., optical tables with steel skin); includes removable rubber isolation pad to prevent surface marring and reduce micro-vibrational coupling.

Sample Compatibility & Compliance

The HTVH-01 is intended for use with standard Ø12.7 mm optical posts, kinematic mirror mounts, lens holders, and fiber launch assemblies. Its mechanical design conforms to ANSI/OEOSC OP1.002-2021 dimensional standards for modular optical mounts. The magnetic base complies with IEC 61000-4-8 (power frequency magnetic field immunity) and includes passive shielding to limit stray field emission beyond 25 mm—ensuring safe operation near sensitive instrumentation including electron microscopy stages, atomic clocks, and MRI-adjacent lab environments. All metallic components are passivated per ASTM A967-22 (nitric acid method) for corrosion resistance in controlled-humidity cleanrooms (ISO Class 5–7).

Software & Data Management

As a purely mechanical adjustment device, the HTVH-01 requires no firmware, drivers, or software integration. However, its dimensional stability and repeatable positioning performance support traceable calibration workflows compliant with ISO/IEC 17025:2017 Clause 6.4.3 (equipment verification). Users may log height settings using calibrated digital calipers (e.g., Mitutoyo 500-196-30) and integrate records into LIMS or ELN platforms via manual entry or CSV import. For automated systems, the mount can be retrofitted with third-party linear encoders (e.g., Renishaw RESOLUTE™ RSLA scale) without structural modification—enabling closed-loop height feedback in custom motion control architectures.

Applications

• Laser cavity alignment: Maintaining Brewster angle consistency across pump and resonator optics during thermal tuning.
• Fiber-optic coupling stations: Precise vertical registration of FC/APC ferrules relative to collimator lenses in single-mode telecom assembly lines.
• Interferometer reference arm staging: Height-matched positioning of retroreflectors in Michelson or Mach-Zehnder configurations where path-length differential must remain <λ/20.
• Education labs: Demonstrating paraxial ray tracing principles and Abbe error minimization in undergraduate optics curricula (aligned with OSA/OSA Education Standards v3.1).
• THz time-domain spectroscopy: Stabilizing emitter/detector separation distance while preserving polarization orthogonality in air-coupled waveguide interfaces.

FAQ

Is the magnetic base safe for use near electronic instrumentation?
Yes—stray field strength falls below 0.1 mT at 30 mm distance, meeting EN 61326-1 requirements for laboratory equipment electromagnetic compatibility.
Can the HTVH-01 be used in vacuum environments?
Not without modification: standard version uses lubricated brass threads unsuitable for UHV; vacuum-compatible variant (HTVH-01-V) features dry-film MoS₂ coating and vented base—contact technical support for qualification data.
What is the maximum allowable moment load?
0.85 N·m about the central axis when mounted on a rigid surface; exceeds ANSI EIA-310-D rack-mount safety thresholds for optical breadboard integration.
Does the 12.5 mm bore accommodate imperial or metric posts?
It accepts both Ø12.7 mm (1/2″) and Ø12.5 mm metric posts with ≤10 µm radial clearance; recommended for use with HT-branded HTR series to ensure full concentricity specification.
How often does the elevation thread require maintenance?
Under typical lab usage (≤5 adjustments/day), re-lubrication with Dow Corning® Molykote® 33 Medium is advised every 12 months or after 5,000 cycles—documented in maintenance logs per GLP Annex 11 Section 5.2.