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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 31, Iss. 11 — Apr. 10, 1992
  • pp: 1794–1802

Real-time fingerprint sensor using a hologram

Seigo Igaki, Shin Eguchi, Fumio Yamagishi, Hiroyuki Ikeda, and Takefumi Inagaki  »View Author Affiliations


Applied Optics, Vol. 31, Issue 11, pp. 1794-1802 (1992)
http://dx.doi.org/10.1364/AO.31.001794


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Abstract

A holographic fingerprint sensor has been developed for a system that identifies a person by his or her fingerprints. The sensor uses a laser as its light source and consists of a light-conducting plate, which is a transparent glass plate with a plain grating-type hologram, and a focusing lens system just under the hologram. Since the sensor uses a plane-parallel plate, all the optical paths from each point of a fingerprint to the hologram are equal, and a bright fingerprint can be created without the trapezoidal distortion that is inherent in conventional prism-type sensors.

© 1992 Optical Society of America

History
Original Manuscript: May 26, 1989
Published: April 10, 1992

Citation
Seigo Igaki, Shin Eguchi, Fumio Yamagishi, Hiroyuki Ikeda, and Takefumi Inagaki, "Real-time fingerprint sensor using a hologram," Appl. Opt. 31, 1794-1802 (1992)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-31-11-1794

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