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Optical transducer

  • US 4,387,300 A
  • Filed: 01/14/1981
  • Issued: 06/07/1983
  • Est. Priority Date: 01/14/1981
  • Status: Expired due to Term
First Claim
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1. An optical transducer comprising an optical transmitter, an optical receiver and an encoder plate disposed therebetween, said encoder plate having light transmissive portions therein for establishing an optical signal from light provided by said transmitter and passing said signal to said receiver, said signal being indicative of the position of said encoder plate with respect to said transmitter and receiver, said optical transducer being characterized bya housing accommodating and providing a mount for said transmitter, receiver and encoder plate, said housing further accommodating an optical fluid having an index of refraction similar to those of said transmitter, receiver and light transmissive portions of said encoder plate, said optical fluid being flowable between said encoder plate and said transmitter and receiver for minimization of refraction of light transmitted to and from said encoder plate, for absorbing mechanical shock and vibration and for lubrication of movement of said encoder plate within said housing.

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