SPECIM HI400S High-Intensity Halogen Line Light Source

Overview

The SPECIM HI400S is a high-intensity, continuous-spectrum halogen-based line light source engineered for demanding hyperspectral imaging applications in both industrial inspection and scientific research environments. Operating on the principle of thermal blackbody radiation, the HI400S delivers stable, spatially uniform illumination across the full visible and near-infrared to short-wave infrared (VNIR–SWIR) spectral region—from 400 nm to 2500 nm—enabling consistent radiometric calibration and high-fidelity spectral data acquisition. Its optimized optical design minimizes spectral roll-off at wavelength extremes while maintaining low temporal drift (<0.5% intensity variation over 8 hours under stabilized thermal conditions), critical for quantitative reflectance and transmittance measurements. Unlike pulsed or LED-based sources, the HI400S provides inherently smooth, gap-free spectral output without discrete peaks or narrowband artifacts—making it particularly suitable for push-broom hyperspectral cameras requiring high signal-to-noise ratio (SNR) and photometric stability across extended acquisition sequences.

Key Features

• High-output halogen filament architecture delivering >100 W radiant flux in the 400–2500 nm band, with calibrated spectral irradiance traceable to NIST standards
• Optimized elliptical reflector and collimating lens system ensuring ±3% irradiance uniformity across a 350 mm field-of-view at standard working distance (300 mm)
• Wide-input AC power supply (90–264 VAC, 47–63 Hz) enabling operation in diverse global laboratory and factory-floor electrical infrastructures
• Modular mechanical interface supporting linear tiling (end-to-end) or parallel side-by-side configuration for scalable illumination zones up to 2 m width
• Integrated thermal management with forced-air cooling and temperature-stabilized housing, sustaining operational stability under continuous duty cycles
• Robust aluminum alloy chassis rated IP52 for dust resistance and limited moisture ingress, suitable for controlled industrial environments

Sample Compatibility & Compliance

The HI400S is compatible with all push-broom hyperspectral imaging systems operating in VNIR (400–1000 nm) and SWIR (1000–2500 nm) bands—including those from SPECIM, Headwall Photonics, and BaySpec. It supports standardized reflectance measurement protocols per ASTM E275, ISO 13406-2 (for uniformity assessment), and USP (for pharmaceutical surface analysis). The source meets CE marking requirements for electromagnetic compatibility (EN 61326-1) and safety (EN 61000-3-2/3), and conforms to RoHS Directive 2011/65/EU regarding hazardous substance restrictions. While not intrinsically safe, its enclosure design allows integration into Class 1 Division 2 (C1D2) compliant inspection stations when installed per IEC 60079-14 guidelines.

Software & Data Management

The HI400S operates as a hardware-calibrated illumination component—not a standalone instrument—and therefore does not include embedded firmware or user-facing software. However, its spectral irradiance profile is supplied in machine-readable format (.csv and .xml) aligned with the CIE 15:2018 spectral power distribution conventions, facilitating direct import into radiometric correction pipelines used in SPECIM’s INSIGHT software, ENVI, or custom Python-based processing workflows (e.g., scikit-image + NumPy). Intensity stabilization is managed externally via analog 0–10 VDC dimming input, compatible with programmable logic controllers (PLCs) and DAQ systems supporting IEEE 1588 PTP time synchronization for synchronized illumination–acquisition timing in high-speed conveyor applications.

Applications

• Industrial food sorting: detection of bruising, mold, foreign material, and compositional heterogeneity in fruits, grains, and processed meats
• Pharmaceutical tablet coating uniformity analysis and API concentration mapping under GLP-compliant validation protocols
• Recyclable material identification (e.g., PET vs. PVC, black plastic sorting) in automated waste stream monitoring systems
• Mineralogical mapping in core scanning and geological surveying, leveraging diagnostic absorption features between 1400–2400 nm
• Art conservation science: non-invasive pigment identification and binder degradation assessment in historical manuscripts and paintings
• Plant phenotyping: chlorophyll-a/b ratio estimation, water stress indexing (NDWI), and nitrogen status quantification in greenhouse and field trials

FAQ

Is the HI400S compatible with cooled InGaAs SWIR cameras?
Yes—the HI400S provides sufficient photon flux above 1500 nm to support integration with thermoelectrically cooled InGaAs line-scan cameras operating up to 2500 nm, provided exposure times exceed 1–2 ms and f-number is ≤f/2.8.
Can multiple HI400S units be synchronized for strobed illumination?
No—the HI400S is a continuous-output source; it lacks electronic shuttering capability. For pulsed illumination, external mechanical shutters or alternative flash-based sources are recommended.
Does SPECIM provide NIST-traceable calibration certificates for individual units?
Yes—upon request and subject to additional lead time and fee, SPECIM issues ISO/IEC 17025-accredited spectral irradiance calibration reports per unit, valid for 12 months from date of issue.
What is the expected lifetime of the halogen lamp under continuous operation?
Rated lamp life is 2,000 hours at nominal voltage; lifetime extends to ~3,500 hours when operated at 90% nominal power using the analog dimming interface.
Is the HI400S suitable for use in cleanroom environments (ISO Class 5 or better)?
Not without modification—the standard unit emits particulates from filament evaporation and requires external HEPA-filtered airflow; a cleanroom-optimized variant with quartz-sealed lamp housing and zero-outgassing materials is available under custom order (HI400S-CR).