ZOLIX LSH-T50 Tungsten-Halogen Light Source with LSP-T50 Constant-Current Power Supply

Overview

The ZOLIX LSH-T50 Tungsten-Halogen Light Source is a precision-engineered optical illumination system designed for demanding laboratory and industrial applications requiring stable, broadband visible–near-infrared (VIS–NIR) radiation. Operating on the principle of incandescent emission from a halogen-doped tungsten filament, the LSH-T50 delivers high spectral continuity across 300–2500 nm — a critical attribute for spectroscopic calibration, spectrophotometer validation, reflectance/transmittance measurements, and optical component testing. Its color temperature of ≥3000 K ensures strong radiance in the 600–1800 nm range, closely approximating Planckian blackbody behavior with emissivity ε(λ) ≈ 0.2–0.5 across the spectrum. The system integrates a thermally stabilized lamp housing and an optimized elliptical reflector to maximize collimated output and minimize thermal drift, enabling reproducible irradiance profiles essential for quantitative optical metrology.

Key Features

• Stable broadband output from 300 nm to 2500 nm — validated for use in UV-Vis-NIR spectrophotometers, FTIR accessories, and monochromator-based setups
• Optical axis height adjustable between 134 mm and 154 mm — facilitates precise alignment with optical benches, integrating spheres, and fiber-coupled systems
• Integrated thermal management and quartz-halogen envelope design — sustains consistent color temperature with ≤50 K deviation over full rated lamp life
• High luminous efficacy (20–30 lm/W) and exceptional photometric stability (±0.12–1% RMS fluctuation when driven by ZOLIX LSP-T50 constant-current supply)
• Modular architecture: LSH-T50 lamp housing is mechanically and electrically compatible with LSP-T50, LSP-T75, and LSP-T150 constant-current drivers
• Tool-free lamp replacement mechanism — minimizes downtime during routine maintenance or lamp cycling
• 3½-digit LED current readout on LSP-T50 driver — supports real-time monitoring and traceable current setting (0–5.5 A range, manual potentiometer + 0–10 V analog control input)

Sample Compatibility & Compliance

The LSH-T50 is routinely deployed in ISO/IEC 17025-accredited laboratories for instrument qualification per ASTM E275, ISO 9001 calibration workflows, and USP spectrophotometer verification protocols. Its spectral continuity and low temporal noise make it suitable for reference-grade applications including NIST-traceable radiometric calibration of CCD/CMOS detectors, integrating sphere uniformity mapping, and optical filter characterization. The lamp housing conforms to IEC 61000-6-3 (EMC emissions) and IEC 61000-6-2 (immunity) standards. All ZOLIX tungsten-halogen lamps are manufactured to RoHS Directive 2011/65/EU specifications and feature fused silica envelopes compliant with ISO 10110-7 surface quality requirements.

Software & Data Management

While the LSH-T50/LSP-T50 system operates as a stand-alone analog light source, its 0–10 V analog control interface enables seamless integration into automated test environments. Users may synchronize intensity modulation with data acquisition systems (e.g., National Instruments DAQ, Thorlabs Kinesis, or LabVIEW-based platforms) for time-resolved transmittance studies or closed-loop irradiance stabilization. The LSP-T50 driver supports external current ramping and step-setpoint triggering, facilitating compliance with GLP/GMP audit trails when logged via third-party SCADA or LIMS software. No proprietary firmware or vendor-locked drivers are required — all electrical interfaces adhere to industrial-standard signal conventions.

Applications

• Calibration and performance verification of UV-Vis-NIR spectrophotometers (e.g., PerkinElmer Lambda, Agilent Cary, Shimadzu UV-3600)
• Broadband reference source for FTIR interferometer alignment and detector linearity assessment
• Illuminant for goniophotometric measurement of diffuse reflectance standards (e.g., Spectralon®, BaSO₄ tiles)
• Stable excitation source in fluorescence lifetime imaging (FLIM) setup pre-characterization
• Reference emitter in optical thin-film coating R&D, particularly for monitoring deposition uniformity across large-area substrates
• Primary irradiance standard in national metrology institute intercomparisons (e.g., NIM, NPL, PTB)

FAQ

What is the effective spectral output range of the LSH-T50 system?
The LSH-T50 emits measurable radiant power from 250 nm to 2700 nm; however, practical application bandwidth is defined as 300–2500 nm due to quartz envelope cutoff and atmospheric water vapor absorption beyond 2500 nm.
Can the LSH-T50 be used with non-ZOLIX power supplies?
Yes — but only with constant-current DC sources delivering 0–5.5 A at ≤15 V compliance voltage. Use of unregulated or voltage-mode supplies will accelerate filament degradation and compromise spectral stability.
Is the LSH-T50 compatible with fiber-optic coupling?
Yes — the front aperture accepts standard SMA905 or FC/PC adapters via optional collimator-focusing kits (sold separately). Coupling efficiency exceeds 75% into 600 µm core fiber when using the LSH-T50-F focusing attachment.
How often should the lamp be replaced under continuous operation?
Rated lifetime is 2000 hours at nominal current. For applications requiring photometric repeatability better than ±0.5%, we recommend scheduled replacement after 1500 hours or upon observed >3% integrated flux drop (measured with calibrated photodiode).
Does the system support remote computer control?
The LSP-T50 driver does not include USB or Ethernet ports; however, its 0–10 V analog interface allows full programmability via DAQ cards or PLC outputs — no custom drivers or SDKs are needed.