Scanned display with switched feeds and distortion correction

  • US 6,795,221 B1
  • Filed: 08/05/1999
  • Issued: 09/21/2004
  • Est. Priority Date: 08/05/1999
  • Status: Expired due to Term
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First Claim
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1. An apparatus for producing a scanned optical beam that scans through a substantially rectilinear pattern, comprising:

  • a first mirror mounted to scan periodically about a first axis at a first frequency, the first mirror being positioned to sweep the optical path about the first axis in a forward direction and a reverse direction;

    a first light feed positioned in a first location and oriented to emit a first beam of light from a first location toward the first mirror, the first light feed being responsive to a first electrical signal to emit the first beam;

    a second light feed positioned in a second location and oriented to emit a second beam of light from a second location toward the first mirror, the second light feed being responsive to a second electrical signal to emit the second beam; and

    an electronic control circuit having a first output coupled to the first light feed and a second output coupled to the second light feed, the electronic control circuit being operative to provide the first electrical signal when the mirror sweeps in the forward direction and operative to provide the second electrical signal when the mirror sweeps in the reverse direction.

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