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Optical system for scanning and recording bar codes which is adapted to be configured in a hand held unit

  • US 5,786,581 A
  • Filed: 11/25/1996
  • Issued: 07/28/1998
  • Est. Priority Date: 02/07/1991
  • Status: Expired due to Fees
First Claim
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1. A system for controlling optical power output of a solid state light source in a bar code scanner, comprising:

  • means for maintaining the optical power at a preset level,computer means for generating a digital signal corresponding to said preset level and for generating an allowance signal when the bar code scanner is performing a scanning operation,means in said maintaining means responsive to said digital signal for setting said maintaining means to maintain the optical power at the preset level,inhibit means for disallowing operation of the solid state light source by cutting off all current from being supplied to said solid state light source when the allowance signal is not generated by said computer means,generating means for providing an output representing said optical power when illuminated by said light source,means for changing said digital signal until said output reaches a certain level, andmeans in said computer means for storing said digital signal corresponding to said preset level.

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