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Optical device including multiple reflectors and optical systems for reading bar codes

  • US 5,925,867 A
  • Filed: 03/10/1997
  • Issued: 07/20/1999
  • Est. Priority Date: 09/27/1996
  • Status: Expired due to Fees
First Claim
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1. An optical device comprising:

  • a light-emitting element mounted on a head to emit a first beam of light toward an object;

    a light-sensing element mounted on the head to sense a second beam of light, the second beam of light being the first beam of light reflected by a surface of the object;

    a first optical system positioned to converge the first beam of light;

    a second optical system positioned to converge the second beam of light substantially to the light-sensing element;

    a housing in which the light emitting element, the light sensing element, and the first and second optical systems are accommodated;

    a cover disposed on the housing, the cover having an inclined surface which reflects the first beam of light toward the surface of the object and reflects the second beam of light toward the light-sensing element via the second optical system; and

    wherein said light-sensing element has a reflector for reflecting the second beam of light to change its direction of travel.

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