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Fingerprint image optical input apparatus

  • US 20010050765A1
  • Filed: 04/09/2001
  • Published: 12/13/2001
  • Est. Priority Date: 10/09/1998
  • Status: Active Grant
First Claim
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1. In an imaging apparatus, having a platen (1) composed of a transparent material with an exterior surface for the skin of a finger and an opposed interior surface;

  • a light source (2), for directing light to or reflecting light off said interior surface of said platen adjacent to the skin of the finger;

    a linear sensor array (4); and

    a GRIN lens array (3), for focusing the light from the top interior surface of the platen onto the linear sensor array, the improvement comprising;

    (a) said linear sensor array (4) is stationary;

    (b) said GRIN lens array (3) is stationary; and

    (c) said GRIN lens array (3) is situated at an oblique angle to said platen (1).

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