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Optical sensor and reflector to reflect a different wavelength

  • US 4,563,577 A
  • Filed: 03/29/1983
  • Issued: 01/07/1986
  • Est. Priority Date: 04/13/1982
  • Status: Expired due to Fees
First Claim
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1. An optical sensor system comprising:

  • a transmitter for transmitting light of a first wavelength;

    reflector means disposed for receiving light transmitted by the transmitter, for converting light impinging on the reflector means from said first wavelength to a different second wavelength and for emitting light or said second wavelength upon reception of light of said first wavelength from said transmitter; and

    a receiver disposed to receive light emitted by the reflector means operative to detect light of said second wavelength, wherein the reflector means is of U-shaped cross section having a central web portion and a pair of parallel leg portions extending from the central web portion at opposite ends thereof, the central web portion having an incidence surface facing the transmitter, said incidence surface being at least partially transparent to light from the transmitter, the leg portions having respective end faces acting as the exit surfaces, said exit surfaces being at least partially transparent to light of said second wavelength.

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