An accurate laser radiometer for determining visible exposure times.
A laser light radiometer has been developed for the Electro-Optics Branch of the Center for Devices and Radiological Health (CDRH). The radiometer measures direct laser radiation emitted in the visible spectrum. Based upon this measurement, the instrument's microprocessor automatically determines at what time duration the exposure to the measured laser radiation would exceed either the class I accessible emission limits of the Federal Performance Standard for laser products or the maximum permissible exposure limits of laser user safety standards. The instrument also features automatic background level compensation, pulse measurement capability, and self-diagnosis. Measurement of forward surface illumination levels preceding HpD photoradiation therapy is possible.
D003201:Computers; D006801:Humans; D007834:Lasers / Q000009:adverse effects*; D008838:Microcomputers; D011874:Radiometry / Q000295:instrumentation*; D012160:Retina / Q000528:radiation effects; D012984:Software