NIST-Traceable Calibration Light Sources
Radiometric and photometric calibrations have relied on lamp-based sources of radiant flux for decades. Lamps that produce a broad continuum of radiation serve as spectral calibration sources for systems measuring a myriad of radiometric or photometric quantities, while lamps that have very well characterized and sharp spectral features can be used as a wavelength calibration source. Since the mid-20th century, lamp-based calibration standards have proven themselves as dependable tools for calibrating light sensors, imaging cameras, solar cell or detector characterization, and more. Recently, rapid advancements in the field of solid-state lighting have presented opportunities for the use of LED-based systems for calibrations typically performed with lamp-based sources. Their highly efficient and long-lived performance, rapid power up, and compact size have made LED-based sources an attractive alternative for lamp-based calibration systems. However, replicating the precision performance of lamp-based system, particularly in terms of the output intensity and stability, pose several challenges for LED-based calibration systems.
The OL 459 Tunable LED Standard is designed for use as a reference source when calibrating VIS & NIR imaging cameras, photometers, colorimeters, and other optical instruments. The user can define various reference spectral profiles to suit the application requirements of the devices under test.
The OL 458-4 is a NIST-traceable, white LED-based integrating sphere calibration standard, designed for accurately calibrating micro- and telephotometers, image intensifiers, and imaging photometers. A proprietary design allows for true continuous spectrum across the visible range. Precision source temperature control delivers extremely stable output over long periods of usage. The design and output are customizable upon request.
The OL Series 455-SA Automated Integrating Sphere Calibration Standard is designed for accurately calibrating microphotometers, image intensifiers, telephotometers, and imaging spectroradiometers for photometric, radiometric, and spectroradiometric response. It is a large area, uniform, diffusely radiating source with a near normal luminance that can be varied over many decades without changing the color temperature.