Accession Number : AD0163560


Title :   Single Crystal Infrared Image Converter.


Descriptive Note : Patent,


Corporate Author : OFFICE OF THE SECRETARY OF THE ARMY WASHINGTON D C


Personal Author(s) : Becker,Allan G.


Report Date : 10 AUG 1971


Pagination or Media Count : 5


Abstract : The invention relates to a device for converting infrared radiation into visible light in order to make infrared images visible for viewing, detecting, and/or recording. In the converter, a single crystal of zinc sulfide is irradiated by a source of ultraviolet light thereby trapping charge carriers in the crystal at impurity or defect sites in the crystal lattice. The crystal is then exposed to a desired scene of infrared radiation that frees the charge carriers and, through quantum transitions, emits photons thereby producing a visible image of the desired scene. A cryogenic device and optical system are employed to reduce ambient infrared radiation and to increase the converter's sensitivity to radiation of 15 microns and longer. (Author)


Descriptors :   (*IMAGE CONVERTERS, *PATENTS), ZINC SULFIDES, SINGLE CRYSTALS, INFRARED IMAGES, FREQUENCY MULTIPLIERS, INFRARED DETECTORS


Subject Categories : INFRARED DETECTION AND DETECTORS
      OPTICS


Distribution Statement : APPROVED FOR PUBLIC RELEASE