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Hand-held bar code scanner with jointly mounted scanning mirrors

  • US 5,021,641 A
  • Filed: 12/21/1989
  • Issued: 06/04/1991
  • Est. Priority Date: 02/28/1985
  • Status: Expired due to Term
First Claim
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1. A hand-held bar code scanning device for reading bar code symbols, comprising:

  • (a) a laser light source mounted in the hand-held device for generating a light beam, said light beam being directed along a path toward a bar code symbol located exterior of the hand-held device to result in reflected light traveling back to the device;

    (b) a scanner in said hand-held device including a moving mirror assembly in said path driven by a motor, said scanner causing said light beam and a field of view for said reflected light to move along a scan line across the bar code symbol;

    (c) a sensor mounted in said hand-held device detecting said reflected light via said moving mirror assembly and generating an electrical signal responsive to said reflected light;

    (d) wherein said moving mirror assembly includes a curved mirror for focusing said reflected light on said sensor, and a generally-flat scan mirror different from said curved mirror for scanning said light beam along said scan line, and wherein said scan mirror and curved mirror are jointly supported and driven jointly by said motor;

    (e) a housing having a gun-like shape with a barrel portion containing said light source, said scanner and said sensor, the housing having a pistol-grip type of handle, said sensor being mounted in said barrel portion forward of said moving mirror assembly.

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