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Optica Publishing Group
  • Chinese Optics Letters
  • Vol. 10,
  • Issue 12,
  • pp. 122201-122201
  • (2012)

Optical design of high performance f ingerprint scanner with large capture size

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Abstract

We present an optical design for a fingerprint scanner that addresses the challenges involved in capturing the prints of rolling fingers. A rolling fingerprint scanner requires a high performance distortion free system with big object space numerical aperture (0.022) and larger capture size (40 × 40 (mm)). We show how these requirements can be achieved with the approach of optical and computational hybrid distortion correction. In addition, dark background illumination is utilized to increase fingerprint contrast.

© 2012 Chinese Optics Letters

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