Method and apparatus for monitoring optical radiation

Abstract From the Canadian patent

A biologically weighted ultraviolet radiant energy monitor provides a direct indication of the hazards to humans from the energy emanating from an optical radiation source. The radiation is first spectrally dispersed by passage through a suitable prism or diffraction grating. Portions of the dispersed radiation are mechanically masked in accordance with a predetermined biological weighting. The weighted output from the mechanical mask is then fed to a suitable detector. In the various embodiments of the ultraviolet hazard monitor a quartz prism or diffraction grating spectrograph is utilized to spectrally disperse the incident radiation spatially and a plate coated with sodium salicylate or …