Patent ID: 8325245

Claim:
An apparatus comprising: an optical filter configured to sense radiation including radiation in the wavelength range from 3μm to 16μm and configured to provide an optical signal including visible light converted from sensed infrared radiation at the optical filter without converting the sensed infrared radiation to an electrical signal; a CMOS imager to receive an input from the optical filter such that the input includes the optical signal correlated to radiation in the wavelength range from 3μm to 16μm, if sensed by the optical filter, the optical filter and the CMOS imager arranged in a safety camera; and a signal processor to analyze output from the CMOS imager, responsive to the input from the optical filter, relative to a safety hazard event associated with sensing emitted radiation with the safety camera from an object in an area, the signal processor arranged to identify, from the radiation sensed by the optical filter, objects, varying thermal conditions of the objects, and motions of the objects in the area.