The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 30, 1987
Filed:
Oct. 04, 1985
Frederick Vescial, Orange, CA (US);
Rockwell International Corporation, El Segundo, CA (US);
Abstract
A readout apparatus responsive to clockwise and counter-clockwise counter-rotating light beams that have a frequency difference relatable to the rate of rotation of a ring laser gyroscope, the readout apparatus comprising means for removing a portion of the light beams from the ring of the ring laser gyroscope; means for displacing the removed counter rotating beams to overlap a portion of the light of the removed beams to form a first spot beam having fringe motion characterized by an array of co-parallel alternating stripe regions of high and low intensity light within the spot; a mask having an array of co-parallel, rotated, alternating transparent and opaque stripes; the mask being positioned to direct the fringe motion of the spot beam through the mask, the mask array of alternating and opaque stripes being aligned to form a second spot beam having a moire fringe motion characterized by an array of co-parallel alternating stripe regions of high and low intensity light within the spot moving transverse to the fringer motion of the spot beam; means for receiving the second spot beam and for detecting the moire fringe motion within the second spot beam characterized by an array of co-parallel alternating stripe regions of high and low intensity light within the spot moving transverse to the fringe motion of the first spot beam.