OL 200/220/245 Spectral Irradiance Standard Lamps by Optronic Laboratories

Overview

The OL 200/220/245 series of spectral irradiance standard lamps are precision-calibrated tungsten-halogen sources engineered for radiometric and photometric reference applications in metrology laboratories, optical testing facilities, and instrument calibration centers. Designed and manufactured by Optronic Laboratories (USA), these standards operate on the principle of blackbody-like spectral emission from stabilized tungsten filaments under precisely controlled current and thermal conditions. Each lamp is individually calibrated using a NIST-traceable methodology—employing the OL-750D double monochromator system in wavelength-by-wavelength comparison mode against primary NIST standard lamps. This ensures absolute spectral irradiance values (W·m⁻²·nm⁻¹) across broad spectral domains—from deep ultraviolet (250 nm) to far infrared (4500 nm)—with documented uncertainty budgets aligned with ISO/IEC 17025 requirements.

Key Features

• Three power-class variants: OL-200 (1000 W), OL-220 (200 W), and OL-245 (45 W), optimized for different beam uniformity, thermal stability, and spatial irradiance requirements.
• Multiple spectral calibration configurations: Selectable spectral bands including UV-VIS (250–750 nm), NIR (750–2500 nm), extended NIR (250–2500 nm), full IR (250–4500 nm), photopic-weighted (380–780 nm), and photometric (V(λ)) modes.
• Two calibration accuracy tiers: Standard uncertainty of ±1.0–1.5% (k=2) across most spectral regions; high-accuracy option certified to ±0.5% (k=2) for critical validation workflows.
• Traceable color temperature calibration available with “K” suffix (e.g., OL-220K), enabling CCT verification per CIE 15:2018 and IEC 62471.
• Included mechanical infrastructure: Precision-adjustable lamp alignment stand and rigid mounting fixture ensure repeatable positioning and collimation during intercomparison or spectroradiometer validation.
• Seasoned uncalibrated units (“U” suffix) provided for lamp aging studies or internal reference stabilization prior to formal calibration.

Sample Compatibility & Compliance

These standard lamps are compatible with all major classes of spectral radiometers, imaging spectroradiometers, hyperspectral sensors, and broadband radiometers used in display metrology, solar simulator validation, LED package characterization, and environmental UV monitoring. Each unit is supplied with a full calibration certificate containing spectral irradiance data at 1-nm or 5-nm intervals (user-specified), uncertainty profiles per wavelength, lamp operating current/voltage specifications, filament geometry documentation, and NIST chain-of-custody records. The calibration process adheres to ASTM E275, ISO 13406-2 Annex B, CIE Publication S 014/E:2020, and supports audit readiness for FDA 21 CFR Part 11-compliant environments when paired with validated data acquisition software.

Software & Data Management

Calibration datasets are delivered in standardized ASCII format (.txt) and Excel (.xlsx), fully compatible with MATLAB, Python (NumPy/Pandas), and industry-standard optical simulation platforms (e.g., LightTools, ASAP, FRED). Optronic Laboratories provides optional integration support for automated data ingestion into LIMS systems via CSV schema mapping. All certificates include digital signatures and embedded metadata compliant with ISO 17025 clause 7.8.2 for result reporting integrity. For laboratories requiring electronic audit trails, the OL-750D control software (v5.2+) supports 21 CFR Part 11-compliant user authentication, electronic signatures, and immutable calibration session logs.

Applications

• Primary calibration of spectroradiometers, goniospectroradiometers, and array-based radiometric sensors.
• Validation of solar simulator spectral match (Class A/B/C per IEC 60904-9) and UV-A/UV-B irradiance uniformity.
• Reference source for display luminance and chromaticity verification (e.g., OLED, microLED, AR/VR near-eye displays).
• Traceable irradiance reference for UV curing system qualification and phototherapy device calibration.
• Inter-laboratory comparison studies under CCPR key comparisons (e.g., CCM.K4, CCM.K10).
• Supporting GLP/GMP compliance for pharmaceutical light stability testing (ICH Q1B, USP ).

FAQ

What is the recommended warm-up time before measurement?
A minimum of 30 minutes is required for thermal and spectral stabilization; optimal repeatability is achieved after 45–60 minutes at nominal current.
Can OL-200/220/245 lamps be used for absolute irradiance measurements at non-standard distances?
Yes—provided inverse-square law corrections are applied and beam divergence is characterized; angular irradiance distribution data is available upon request.
How often should recalibration be performed?
Annual recalibration is recommended for routine metrology use; biannual recalibration is advised for high-utilization environments or regulatory audit cycles.
Is filament replacement supported by Optronic Laboratories?
No—these are sealed, factory-calibrated reference sources; replacement requires full recharacterization and cannot be field-performed.
Do these lamps meet CIE TR 211:2022 requirements for reference sources?
Yes—the OL-200/220/245 series satisfies CIE TR 211:2022 criteria for stability, spatial uniformity, and spectral uncertainty budgeting for Class A reference lamps.