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Optical fiber coupled resolver having a reference signal

  • US 4,908,510 A
  • Filed: 09/02/1988
  • Issued: 03/13/1990
  • Est. Priority Date: 09/02/1988
  • Status: Expired due to Fees
First Claim
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1. An optical encoder comprising:

  • a movable element having a means for modulating light comprising a variably transmissive material on the movable element;

    a means for alternately transmitting light through a first path which by-passes the variably transmissive material and a second path which includes the variably transmissive material.

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