HalfMoon DV-LED Photometric and Colorimetric Measurement System
| Brand | HalfMoon |
|---|---|
| Origin | Japan |
| Manufacturer Type | Authorized Distributor |
| Origin Category | Imported |
| Model | DV-LED |
| Pricing | Upon Request |
Overview
The HalfMoon DV-LED Photometric and Colorimetric Measurement System is a precision-engineered optical metrology platform designed for comprehensive spectral, photometric, and colorimetric characterization of LED-based light sources. Built upon a high-efficiency integrating sphere architecture with external mounting capability for non-emitting components (e.g., drivers, heat sinks, and mechanical fixtures), the system minimizes photon absorption artifacts that commonly degrade luminous flux accuracy in conventional internal-mount configurations. Its optical design leverages specular reflectance enhancement—achieving approximately 2× higher radiometric sensitivity compared to standard diffuse-coated spheres—thereby improving signal-to-noise ratio and measurement reproducibility across low-flux and high-power LED devices. The system operates on the principle of total hemispherical flux collection under controlled electrical and thermal boundary conditions, enabling traceable compliance with Japanese Industrial Standards (JIS) for lighting evaluation.
Key Features
- External fixture mount for non-luminous components—eliminates stray absorption and improves absolute luminous flux accuracy per JIS C 7801:2009 and JIS C 8152:2007
- Specular-enhanced integrating sphere surface—doubles effective photometric sensitivity without compromising spatial uniformity
- Virtually symmetric goniophotometric configuration—reduces angular integration error during spectral radiant power summation
- Optional programmable DC power supply interface—enables automated current/voltage sweeps for I-V-L and L-I characteristic mapping
- Optional thermal control module—supports temperature-dependent photometry from −10 °C to +85 °C with ±0.2 °C stability for junction-temperature correlation studies
- Modular optical path design—facilitates rapid reconfiguration for directional emission testing (0°–180° lamp orientation)
- Compact footprint (< 1.2 m² floor space)—optimized for QC labs and R&D environments with limited bench area
Sample Compatibility & Compliance
The DV-LED accommodates a broad range of solid-state lighting devices including SMD LEDs, COB modules, LED lamps (A19, PAR30, T8), and micro-LED arrays. Its configurable port geometry and adjustable sample holder support both axial and lateral mounting. All photometric and colorimetric outputs are traceably aligned to national standards through NMIJ (National Metrology Institute of Japan)-validated calibration protocols. The system supports full compliance with JIS C 7801:2009 (luminous flux), JIS Z 8724:1997 (CIE 1931 xy chromaticity), JIS Z 8725:1999 (CCT and Duv), JIS Z 8701:1999 (dominant wavelength and purity), and JIS Z 8726:1990 (CRI Ra and extended R1–R15 indices). Data integrity meets GLP audit requirements, with optional timestamped metadata logging and user-access-controlled measurement history.
Software & Data Management
The system integrates with HalfMoon’s proprietary SpectraView™ v4.x software suite, providing real-time spectral acquisition, multi-parameter reporting, and batch analysis workflows. Software features include automated JIS-compliant report generation (PDF/CSV), spectral comparison overlays, binning logic for production sorting, and customizable pass/fail thresholds. Audit trail functionality complies with FDA 21 CFR Part 11 requirements when configured with electronic signatures and role-based access control. Raw spectral data is stored in standardized JCIA-XML format, ensuring interoperability with third-party platforms such as LightTools®, ASAP®, and MATLAB® for optical modeling and statistical process control (SPC).
Applications
- LED manufacturer QA/QC—luminous flux verification, chromaticity binning, and CCT drift monitoring over drive current and temperature
- R&D validation of phosphor-converted white LEDs and narrow-band emitters (e.g., horticultural, UV-A, deep-red)
- Third-party certification lab testing for PSE, JET, and VCCI regulatory submissions
- Thermal-optical coupling analysis—correlating junction temperature rise with chromaticity shift (Δu′v′) and CRI degradation
- Design validation of secondary optics—measuring near-field intensity distribution and far-field beam patterns via auxiliary goniometer integration
- Standards laboratory intercomparison—NMIJ-traceable transfer measurements for luminous intensity scale dissemination
FAQ
Does the DV-LED system support automatic calibration verification?
Yes—optional NIST-traceable reference LEDs and spectral irradiance standards can be integrated for daily verification routines with auto-log and deviation alerting.
Can the system measure pulsed or PWM-driven LEDs?
Yes—the spectrometer trigger synchronization and exposure gating support transient photometry down to 10 µs pulse width with jitter < 1 µs.
Is firmware upgrade support available remotely?
Yes—secure HTTPS-based firmware updates are delivered via HalfMoon’s Customer Portal with version-controlled release notes and rollback capability.
What spectral resolution and wavelength range does the core spectrometer provide?
The standard configuration uses a 0.2 nm FWHM grating spectrometer covering 350–1050 nm; optional UV-enhanced or NIR-extended variants are available.
How is thermal management handled during extended high-power measurements?
An active air-cooled sphere jacket and optional liquid-circulated baseplate maintain sphere wall temperature within ±0.5 °C during 4-hour continuous operation at 100 W input.
