Accession Number : ADD011829
Title : Optical Sensing Devices.
Descriptive Note : Patent,
Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC
Personal Author(s) : Shajenko,P
Report Date : 11 Jun 1985
Pagination or Media Count : 6
Abstract : This patent describes optical sensing devices comprising dual chamber apparati which use signal and reference light beams together with interferometric methods for detection of physical quantities of interest. The signal part of the chamber experiences the effects of a particular physical quantity to be measured which produce variations in the optical length of the light beam by movement of a mirror, thereby modulating that beam in proportion thereto. Concurrently, the reference beam, of equal pathlength, is passed through an adjacent chamber, isolated from such effects. The modulated signal beam and unmodulated reference beam are then combined to form a fringe pattern, the zero and first order fringes which are superimposed on apertures of an optical fibers, which carry the resultant light beams to a photodetectors for converting the optical fiber, which carry the resultant light beams to a photodetectors for converting the optical signals to proportional electrical signals.
Descriptors : *PATENTS, *OPTICAL DETECTORS, *FIBER OPTICS, MULTIMODE, OPTICAL INTERFEROMETERS, LIGHT SOURCES, PHOTODETECTORS, CHAMBERS, SIGNALS, CONVERTERS
Subject Categories : Optical Detection and Detectors
Fiber Optics and Integrated Optics
Distribution Statement : APPROVED FOR PUBLIC RELEASE