Labsphere Spectra-FT Fine-Tunable VIS-NIR Spectral Calibration Source
| Brand | Labsphere |
|---|---|
| Model | Spectra-FT |
| Origin | USA |
| Light Source Type | Tungsten-Halogen & LED Hybrid Spectral Engine |
| Spectral Range | 390–1000 nm |
| Luminance Range | 10–25,000 cd/m² |
| Field Uniformity | >98% over 360° × 200° FOV |
| Calibration Traceability | NIST-traceable spectral radiance |
| Feedback System | Integrated spectroradiometric real-time feedback loop |
| Re-calibration | User-executable via SpectraSoft™ v4.2 |
| Compliance | ASTM E308, ISO/CIE 11664, USP <1033>, FDA 21 CFR Part 11 (audit trail enabled) |
Overview
The Labsphere Spectra-FT Fine-Tunable VIS-NIR Spectral Calibration Source is an engineered optical reference system designed for high-fidelity spectral radiance calibration of imaging sensors, photodetectors, multispectral cameras, and machine vision systems. Operating on a hybrid illumination architecture—integrating thermally stabilized broadband tungsten-halogen emitters with precision-tuned LED arrays—the Spectra-FT delivers programmable, spectrally accurate radiant output across the visible to near-infrared spectrum (390–1000 nm). Unlike fixed-spectrum sources or monochromator-based systems, the Spectra-FT employs closed-loop spectroradiometric feedback to dynamically adjust spectral power distribution (SPD) in real time, ensuring traceable repeatability under varying ambient and operational conditions. Its core optical engine couples with Labsphere’s proprietary Spectralon® diffuse reflectance material housed within an integrating sphere geometry, enabling spatially uniform irradiance (>98% uniformity) over an ultra-wide 360° × 200° field of view—critical for full-sensor characterization and lens distortion mapping.
Key Features
- Real-time spectroradiometric feedback loop using integrated miniature spectroradiometer (NIST-traceable calibration certificate included)
- User-definable spectral profiles: generate custom SPDs matching CIE illuminants (A, D50, D65, F-series), blackbody curves, or application-specific spectra (e.g., automotive headlight, horticultural LED, medical endoscope emission)
- Dynamic luminance control from 10 to 25,000 cd/m² with <±0.5% short-term stability and <±1.2% long-term drift per 1,000 hours
- Thermally regulated LED modules and active-cooled tungsten source ensure spectral fidelity and intensity stability across extended operation cycles
- Compact benchtop form factor (450 × 320 × 280 mm) with modular mounting interface compatible with automated test handlers and AOI stations
- Full spectral reproducibility: ΔE*ab < 0.15 between repeated identical spectral settings (measured at sensor plane using calibrated reference spectrometer)
Sample Compatibility & Compliance
The Spectra-FT supports calibration of flat-panel displays, CMOS/CCD image sensors, scientific cameras, hyperspectral imagers, automotive ADAS cameras, and biometric iris scanners. Its large-area uniform output enables full-aperture testing without vignetting artifacts. The system complies with key international standards governing optical measurement integrity, including ASTM E308 (computing colorimetric data from spectral measurements), ISO/CIE 11664 (colorimetry fundamentals), and IEC 62676-5 (surveillance camera spectral response testing). For regulated environments, SpectraSoft™ software includes 21 CFR Part 11-compliant audit trails, electronic signatures, and role-based access control—validated for GLP and GMP-aligned quality assurance workflows.
Software & Data Management
SpectraSoft™ v4.2 provides intuitive spectral programming, real-time monitoring, and automated report generation. Users define target spectra via spectral weighting functions, CIE chromaticity coordinates, or direct wavelength-intensity tables. The software logs all calibration events—including lamp aging compensation, thermal drift corrections, and user-initiated re-calibrations—with timestamped metadata. Export formats include CSV, XML (CIE TC 1-83 compliant), and industry-standard .spc files compatible with MATLAB, Python (via PySpectra), and commercial metrology suites (e.g., Radiant Vision Systems TrueTest™, Photon etc.). Remote operation via Ethernet or USB-C enables integration into CI/CD test pipelines.
Applications
- Image sensor spectral responsivity mapping and non-uniformity correction (NUC)
- Color filter array (CFA) validation and white balance algorithm development
- Automotive camera spectral sensitivity verification per ISO 16505 and SAE J2803
- Medical imaging device validation under regulatory-grade illumination conditions
- Display manufacturing: OLED/LCD panel spectral gamut verification and backlight spectral tuning
- Remote sensing instrument pre-flight calibration and ground truth reference generation
FAQ
Is the Spectra-FT NIST-traceable?
Yes—each unit ships with a factory-issued NIST-traceable spectral radiance calibration certificate covering 390–1000 nm at five luminance levels. Recalibration services are available annually through Labsphere’s accredited metrology lab.
Can the Spectra-FT replicate daylight spectra beyond D65?
Yes—it supports full CIE Daylight Series (D50–D75), extraterrestrial AM0, and user-defined solar spectra derived from SMARTS or MODTRAN models.
What maintenance is required?
No consumables or lamp replacements. LED modules are rated for >25,000 hours; tungsten source life exceeds 2,000 hours at nominal output. Annual performance verification is recommended.
Does it support automated test sequencing?
Yes—SpectraSoft™ exposes RESTful API endpoints and LabVIEW/VB.NET drivers for integration into ATE platforms and Python-based test automation frameworks.
How is spatial uniformity verified?
Uniformity is validated per ISO 13660 using a calibrated CCD-based goniophotometer scanning the full 360° × 200° FOV; raw data and uncertainty budgets are provided in the acceptance test report.
