Large view field distortion-free palm print collecting system

Large view field distortion-free palm print collecting system

  • CN 1,641,406 A
  • Filed: 01/15/2004
  • Published: 07/20/2005
  • Est. Priority Date: 01/15/2004
  • Status: Active Application
First Claim
Patent Images

1. , the undistorted palmmprint acquisition system in a kind of big visual field, by right-angle prism (1), plane mirror (2), (4), image-forming objective lens (3), picture receiver (5) and light source (6) are formed, it is characterized in that described plane mirror (2), (4), image-forming objective lens (3) and picture receiver (5) all are fixed on the same housing (7);

  • Housing (7) is done the uniform speed scanning motion, obtain palmprint image with scan mode, its scanning motion axis becomes a fixed angle promptly parallel with the aerial equivalent face of A face with palmmprint workplace A, angle value does not coexist with the material of right-angle prism (1) and selects between 10.5 °



    17 °

    , makes object distance constant in scanning process.

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