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Optical scanner unit having recursive optical system

  • US 5,457,550 A
  • Filed: 02/26/1992
  • Issued: 10/10/1995
  • Est. Priority Date: 02/27/1991
  • Status: Expired due to Fees
First Claim
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1. An optical scanner unit for scanning a document comprising:

  • light source means for emitting a light beam used for scanning the document;

    an optical system in which the light beam emitted from said light source means travels to the document and a reflection light beam obtained by reflection of the light beam on the document returns back through said optical system, said optical system having scanning means for moving the light beam which passes through said optical system so that a two dimensional scanning of the document is carried out by the light beam; and

    detection means, coupled to said optical system, for detecting the reflection light beam returning back through said optical system;

    wherein an image formed on the document is read based on results obtained by said detection means.

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