OPTICAL PYROMETER Russian patent published in 1995 - IPC

FIELD: power photometry. SUBSTANCE: optical pyrometer has input optical system, radiation modulator, radiation receiver, unit for signal processing, and eye-piece; all the units are disposed I series. Mirror objective is introduced between radiation receiver and the modulator, which modulator is made in form of a member with built-in thermal resistance. Axis of symmetry of the objective is sloped to optical axis. Sizes of radiation modulator follow sizes of field of view of radiation receiver. The modulator is placed at doubled focal length from mirror objective at focal plane of input optical system, which is made in form of a lens with the equal focal power in visual spectral range and in receiver sensitivity range for central and peripheral areas. Central area of the lens is conjugated optically with aperture of eye-piece, and peripheral area is conjugated with aperture of mirror objective. Eye-piece mirror is dichroic one and is brought together with entrance window of the receiver. The mirror is disposed in focal plane of the eye-piece at doubled focal length from mirror objective. Reference radiation source is excluded, but modulator with temperature to be adjusted is used as the source. EFFECT: improved precision of measurements; simplified design. 1 dwg