Request InfoOptronic Laboratories LLCThe OL 458-4F white LED-based fixed luminance sphere calibration standard is the latest innovation from Gooch and Housego PLC’s Instrumentation division. The instrument was designed for accurately calibrating micro- and telephotometers, image intensifiers, and cameras. When calibrating imaging photometers and colorimeters, the OL 458-4F can be used for photometric, radiometric, and spectroradiometric response and more! It serves as a NIST-traceable highly accurate diffusely radiating source. The OL 458-4F consists of an optics head and a power supply. 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