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Method and apparatus for capturing skin print images

  • US 5,230,025 A
  • Filed: 08/31/1990
  • Issued: 07/20/1993
  • Est. Priority Date: 08/31/1990
  • Status: Expired due to Fees
First Claim
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1. An identification image recording apparatus, comprising:

  • prism means for propagating light corresponding to raised surfaces of a portion of a human body in contact with the prism means, wherein the prism means comprises a light source and a prism, the prism having a receiving surface and a light propagating surface, wherein the receiving surface has reflective properties which change as a function of contact with the human body portion and wherein the light propagating surface propagates light reflected from the receiving surface, the prism and the light source being configured so that propagated light corresponding to areas of the receiving surface in contact with the raised surfaces is higher in intensity than propagated light corresponding to other areas of the receiving surface;

    image recording means positioned to continuously receive the propagated light, wherein the image recording means comprises an image recording medium for accumulating the light over a period of time corresponding to a complete finger roll to form a skin print image;

    conversion means for converting said skin print image into electrical signals; and

    image processing means connected to said image recording means for receiving said electrical signals.

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