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Optical radiation source or detector device having plural radiating or receiving characteristics

  • US 4,638,343 A
  • Filed: 04/15/1985
  • Issued: 01/20/1987
  • Est. Priority Date: 01/04/1985
  • Status: Expired due to Fees
First Claim
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1. An optical device including an envelope (U) having light refractive surfaces which provide a desired optical characteristic, the envelope of the optical device comprising at least two light refractive surfaces having lenticular curves (L 1, L 2) each with a far focus inside the envelope that are coincident in location, the optical device being disposed at the location and the two refractive surfaces defining two light propogation paths from them to the optical device.

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