SphereOptics' luminance/radiance standards integrating-sphere uniform light source systems accommodate a wide variety of applications, from night vision to remote sensing.

Integrating spheres provide a near-perfect, uniform source of radiance or irridiance for testing and calibrating telescopes, imaging detectors, photometers, radiometers and many electronic imaging devices.

Luminance/radiance sources are available in sphere sizes from 4 ins. (10 cm) to 76 ins. 2 m), each designed with an output port diameter to provide luminance uniformity of ±1%. The systems are equipped with a light source assembly, variable attenuator, power supplies and operating software.

The standard variable attenuator, provided with all systems, is a micrometer-driven manual system that allows for control of input light levels. An automated variable attenuator and controller unit is available when more precise control of the light output level is required.

Application software operates in a convenient Windows environment and is used to control and monitor light output. The software allows users to turn lamps on and off individually and to monitor the voltage and current of the light source. The detector current-calculated luminance and correlated color temperature for the system are monitored in real time so that output can be precisely adjusted. Systems with the automated variable attenuator control option allow users to select and drive luminance values via a software feedback control  linked to a luminance monitor.