Accession Number : ADD013709
Title : Axis Separator Electronic Translator.
Descriptive Note : Patent, Filed 15 Dec 86, patented 26 Apr 88,
Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON DC
Personal Author(s) : Carreras, Richard A ; Baciak, Mark G ; Coates, Elinor L ; Jenks, Morton
Report Date : 26 Apr 1988
Pagination or Media Count : 9
Abstract : In an optically phased array of multiple laser telescopes, the phasing between the telescopes is accomplished by sampling adjacent outgoing wavefronts. The two samples of each wavefront are then combined to form an interference pattern on a camera. This image is then converted to digital signals, employing an error signal representative of the phase difference. It is necessary that the telescopes be pointing in the same direction. This is assured by having each telescope associated with an optical sensor which produces an X or Y tilt error. The X or Y tilt error is corrected by the optical component referred to as the optical path difference adjustor (OPDA). A signal processing circuit is disclosed which receives X and Y tilt error signals, as well as phase error signals, and produces therefrom drive signals which correct and drive the OPDA in an array of multiple laser telescopes.
Descriptors : *LASER APPLICATIONS, *BEAM FORMING, *PHASE CONTROL, *PHASED ARRAYS, *PATENTS, CIRCUITS, DRIVES, ELECTRONICS, ERRORS, INTERFERENCE, LASERS, OPTICAL DETECTORS, OPTICAL EQUIPMENT, PATTERNS, SAMPLING, SEPARATORS, SIGNAL PROCESSING, SIGNALS, TELESCOPES, TILT, TRANSLATORS, WAVEFRONTS, FEEDBACK, LASER CAVITIES, ANALOG TO DIGITAL CONVERTERS
Subject Categories : Lasers and Masers
Distribution Statement : APPROVED FOR PUBLIC RELEASE