The SR300 series VIS-SWIR based integrating sphere sources are used in testing and calibrating DayTV and SWIR imagers. They can be setup to operate as a standalone source or can be integrated into an Optical Test Bench based on a either a METS or ILET Collimator for performing electro-optical test qualification of the DayTV and/or SWIR imagers. Tests using CI Systems' Computerized Test Executive, CTE, can be run include but are not limited to MTF, Dynamic Range, blooming, SNR, Uniformity, distortion as well as resolution testing. The VIS-SWIR integrating sphere source can be used as a calibration tool. With the blackbody radiation source and VIS-SWIR based Integrating Sphere source combined in the test bench, multi-sensor/imagers can be tested as well as boresight measurements done.