Request InfoHGH USAThe Model ISV400 integrating sphere visible source system from Electro Optical Industries Inc. was designed specifically for test and calibration of visible sensor systems such as photometers and CCD cameras. The device comprises a 12-in.-diameter integrating sphere with 4-in.-diameter exit port, four quartz halogen lamps, attenuator, control sensor and electronics that provide uniform and Lambertian luminance from 170 to 34,260 cd/m2. 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