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Optical system of fingerprint image capture apparatus

  • US 20040028262A1
  • Filed: 08/09/2002
  • Published: 02/12/2004
  • Est. Priority Date: 08/09/2002
  • Status: Abandoned Application
First Claim
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1. An optical platen used within an optical system of a fingerprint image capture apparatus, the optical platen comprising a contact face provided with a dull rough surface against which a finger is placed to pickup a fingerprint image, and an opposite viewing face exhibiting a smooth surface through which a fingerprint image light, resulted from a scattering of an incident light striking the contact face, emerges out of the optical platen to be captured by an image sensor.

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