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Transmissive and reflective optical control of sound, light and motion

  • US 5,017,770 A
  • Filed: 08/02/1989
  • Issued: 05/21/1991
  • Est. Priority Date: 10/07/1985
  • Status: Expired due to Term
First Claim
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1. An optical control means comprising:

  • means for producing a plurality of light beams;

    a plurality of directional sensing means arranged to sense cutting of the respective beams by a user and an output signal from said plurality of directional sensing means, the beam producing means being carried on a support means comprising a plurality of arms, the arms being hinged to enable the support means to be collapsed.

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