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Optical-scanning system employing laser and laser safety control

  • US 5,665,942 A
  • Filed: 08/16/1995
  • Issued: 09/09/1997
  • Est. Priority Date: 11/05/1993
  • Status: Expired due to Term
First Claim
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1. In an optical-scanning systema light-beam source in the form of a laser,a power-operated, rotational scanning instrumentality positioned adjacent said source and operable, with rotation, to scan a beam from the source in successive scanning sweeps through a scanning zone,system-monitoring laser safety structure operatively and informationally connected, respectively, to said source and to said instrumentality, operable, in response to the currently understood operational status of said instrumentality, to alter accordingly the effective power output of said source, andduty-cycle substructure which is responsive to information regarding instrumentality angular position to create a power-flow duty cycle for said source which is less than 100-percent, whereby the source is powered at one selected operating level during the time of a scanning sweep, and powered at another, lower, selected sleep level between successive scanning sweeps.

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