OWIS LTM Series Precision Linear Translation Stage

Overview

The OWIS LTM Series Precision Linear Translation Stage is an industrial-grade motorized positioning platform engineered for high-stability, repeatable linear motion in demanding optical and photonics applications. Built on the foundational principles of precision mechanical metrology and low-disturbance kinematic design, the LTM stage employs a recirculating stainless steel linear guideway paired with preloaded anti-backlash drive mechanisms to ensure minimal axial play and thermal drift over extended operation. Its black anodized hard aluminum body—optimized for ultra-low specular reflectivity—meets stringent requirements for laser alignment, interferometry, and vacuum-compatible optical benches where stray light suppression and EMI resilience are critical. Designed and manufactured in Germany, the LTM series adheres to DIN 31000-based mechanical tolerance frameworks and integrates seamlessly into multi-axis goniometric or XYZ stack configurations used in R&D laboratories, semiconductor metrology setups, and OEM instrumentation.

Key Features

• Travel Range Flexibility: Available in standardized stroke lengths from 25 mm to 395 mm, enabling selection based on spatial constraints without compromising rigidity or load capacity.
• Low-Reflectivity Structural Housing: Black anodized EN AW-7075 aluminum alloy offers exceptional strength-to-weight ratio (≥500 MPa UTS), corrosion resistance, and <0.5% diffuse reflectance across 400–1100 nm—critical for minimizing parasitic scattering in visible/NIR optical paths.
• High-Fidelity Motion Control: Integrated micrometer-style fine-adjustment screw eliminates axial backlash; combined with either brushless DC servo or hybrid stepper motor options, the stage supports closed-loop position verification with ±0.5 µm repeatability under nominal load conditions.
• Robust Limit Detection Architecture: Three independent limit switch modalities—Hall effect (non-contact, wear-free), mechanical (tactile, fail-safe), and inductive (metal-target sensitive)—allow configuration per application safety protocol and environmental class (e.g., cleanroom ISO 14644-1 Class 5).
• Vacuum-Ready Mechanical Interface: All fasteners conform to ISO 4762 metric socket-head specifications; no adhesives or polymer seals are used in the core motion path, supporting bake-out up to 80 °C in UHV environments (10⁻⁷ mbar).

Sample Compatibility & Compliance

The LTM stage accommodates standard optical mounts (e.g., SM1, M6, M4 threaded holes on top plate) and interfaces directly with OWIS’s modular T-plate and dovetail coupling systems. It is compatible with payloads up to 5 kg (static) and 2.5 kg (dynamic at 100 mm/s), maintaining angular deviation <15 arcsec/100 mm travel. The device complies with CE marking directives (2014/30/EU EMC, 2014/35/EU LVD), RoHS 2011/65/EU, and conforms to mechanical safety guidelines referenced in ISO 12100. While not certified for medical or aerospace use out-of-the-box, its design basis aligns with traceable calibration practices required under ISO/IEC 17025 for accredited metrology labs.

Software & Data Management

The LTM stage operates via industry-standard motion controllers (e.g., OWIS MC2000, third-party solutions compatible with RS-485, USB-CDC, or EtherCAT protocols). Firmware supports ASCII command sets compliant with SCPI-1999 syntax, enabling integration into LabVIEW, MATLAB, Python (PyVISA), or EPICS control architectures. Position logging includes timestamped encoder feedback (1 µm resolution minimum), and all motion sequences can be exported in CSV format for GLP-compliant audit trails. Optional firmware upgrades enable deterministic jitter reduction (<100 ns timing uncertainty) for time-critical synchronization with pulsed lasers or detector gating.

Applications

• Laser beam steering and cavity length tuning in tunable external-cavity diode lasers (ECDLs)
• Positioning of fiber collimators and photonic integrated circuit (PIC) test probes
• Calibration reference stages in optical coordinate measuring machines (CMMs)
• Multi-wavelength alignment in hyperspectral imaging platforms
• Automated wafer inspection tooling requiring sub-micron step-and-repeat accuracy

FAQ

Is the LTM stage suitable for vacuum environments?
Yes—its all-metal construction, absence of outgassing polymers in the motion path, and optional venting ports support operation down to 10⁻⁷ mbar after standard bake-out.
Can I integrate the LTM with third-party motion controllers?
Yes—RS-485 (Modbus RTU), USB-CDC (virtual COM port), and EtherCAT interfaces are supported; full command documentation and register maps are provided in the technical manual.
What is the maximum recommended payload for dynamic motion?
2.5 kg at speeds up to 100 mm/s while maintaining ≤15 arcsec angular deviation over full travel.
Does the stage include built-in position feedback?
Encoder feedback is available as a factory-configurable option; standard models rely on motor step counting with optional Hall-effect homing sensor for absolute reference.
Are custom travel lengths or mounting patterns available?
Yes—OWIS offers OEM engineering services for non-standard stroke lengths, top-plate threading, and interface adaptations under NDA and ISO 9001-controlled production workflows.