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-20^th 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.

Features

• New aperture drive design for dramatically increased accuracy and shortened seek time
• Heated monitor detector to hold the detector at a steady temperature to reduce settling time, changes with ambient temperatures, and non-linearity
• Unique elongated sphere design reduces the non-uniformity by a factor of 10X

Applications

Accurately calibrating microphotometers, image intensifiers, telephotometers, and imaging spectroradiometers for photometric, radiometric, and spectroradiometric response

Features

• True continuous spectrum across the visible range
• Precision source temperature control delivers extremely stable output over long periods of usage
• Provides constant current for luminance stability

Applications

Accurately calibrating display, signage, lighting and luminance measurement instruments, such as image intensifiers, imaging photometers/ colorimeters, and other cameras

Features

• Embedded thermal management system to maximize stability and control over source output
• Manual or remote operation via USB and the application software
• Memory for up to (10) calibrated profiles and four monitor detector calibration factors

Applications

Reference source for calibrating VIS & NIR imaging cameras, photometers, colorimeters, and other optical instruments