Holographic Fingerprint Sensor

Shin Eguchi; Seigo Igaki; Fumio Yamagishi; Hiroyuki Ikeda; Takefumi Inagaki

doi:10.1117/12.951467

25 May 1989 Holographic Fingerprint Sensor

Shin Eguchi, Seigo Igaki, Fumio Yamagishi, Hiroyuki Ikeda, Takefumi Inagaki

Author Affiliations +

Proceedings Volume 1051, Practical Holography III; (1989) https://doi.org/10.1117/12.951467
Event: OE/LASE '89, 1989, Los Angeles, CA, United States

Abstract

The fingerprint sensor that we developed uses a hologram. Two requirements are important for actual use; laser safety and high-contrast images. The illumination method we developed uses total reflection and a new type of detection. For safety, total-reflection lighting ensures that laser beams cannot enter an operator's eyes. To obtain high-contrast images, signal and noise light were separated.

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Shin Eguchi, Seigo Igaki, Fumio Yamagishi, Hiroyuki Ikeda, and Takefumi Inagaki "Holographic Fingerprint Sensor", Proc. SPIE 1051, Practical Holography III, (25 May 1989); https://doi.org/10.1117/12.951467

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