Accession Number : ADD015210

Title :   Fiber-Optic Remote Angular Position Sensor Including a Polarization Track.

Descriptive Note : Patent, Filed 17 Sep 90, patented 17 Dec 91,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Brininstool, Michael R ; Newmaster, Jeffrey T ; Garrett, Steven L

Report Date : 17 Dec 1991

Pagination or Media Count : 11

Abstract : A sensor for remotely detecting an angular position of a shaft rotatable within a frame includes: first means for generating collimated first, second, third, and polarized optical beams; second means positioned proximate to the first means for receiving and combining the first, second, third, and polarized optical beams into a composite optical beam having an intensity; and a code wheel fixedly mounted to the shaft and interposed between the first and second means. The code wheel includes first, second, and third channel mask patterns and a first polarizing filter positioned to transect the first, second, third, and polarized optical beams, respectively. Interaction between the code wheel and the light beams results in the composite light beam being encoded such that the angular position of the wheel is functionally related to the intensity of the composite optical beam. The sensor further includes third means operably coupled to receive the composite optical beam for providing an output corresponding to the angular position of the code wheel. (Author)

Descriptors :   ANGLES, BEAMS(ELECTROMAGNETIC), BEAMS(RADIATION), BEAMS(STRUCTURAL), CHANNELS, CODING, COMPOSITE STRUCTURES, FILTERS, LIGHT, MASKS, MOUNTS, OPTICAL EQUIPMENT, OPTICS, PATTERNS, POLARIZATION, POSITION(LOCATION), SHAFTS(MACHINE ELEMENTS), WHEELS

Subject Categories : Test Facilities, Equipment and Methods
      Target Direction, Range and Position Finding
      Fiber Optics and Integrated Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE