The XTH-1200 and XTH-2000, Labsphere’s ( http://www.labsphere.com ) Solar Spectrum Uniform Source Systems are used as solar simulators to generate a uniform radiance field which approximates the spectral radiance of a 100% Albedo source, or the spectral curve of the ASTM Standard D65.
The systems can provide variable correlated color temperatures between 2800K and 5900K. This is achieved by combining the spectral output of a tungsten source and a filtered Xenon source within an integrating sphere. The light output from each source is independently controlled providing manipulation of the spectral shape of the output.
Each system monitors radiance levels in cd/m2 and in Foot-Lamberts and all calibrations are traceable to the National Institute of Standards and Technology (NIST).
Best for testing space-based imaging systems, high-speed video/film systems and single element broadband sensors, they offer a photovoltaic and quantum efficiency. Approximating 100% Albedo shape, they feature a variable correlated color temperatures between 3000 K and 6000 K and NIST-traceable calibrations.
The spheres are coated with Spectraflect® white reflectance coating which offers near-Lambertian characteristics and provides exceptional uniform radiance. A spectrometer-based spectral irradiance monitor enables users to accurately monitor the spectral distribution of the sphere for any lamp configuration or variable attenuator position.
A photopic detector is also included for luminance monitoring. The system includes spectrometer software and uniform source control system software. Users can automatically control and monitor the spectral radiance through the exit port from zero to maximum output levels with Labsphere’s motorized variable attenuators (VA-200-SC) and motor controllers (MC-1000).
A high-dynamic range, low-noise CCD-based spectrometer monitors the spectral irradiance from 350 to 1050 nm. Labsphere’s highly sensitive SDA-050-P-RTA detector and SC 6000 radiometer are calibrated for luminance responsivity and enable users to independently monitor luminance through the exit port in units of cd/m2 or fL.