REAL-TIME FINGERPRINT SENSOR USING A HOLOGRAM

被引：9

作者：

IGAKI, S

EGUCHI, S

YAMAGISHI, F

IKEDA, H

INAGAKI, T

机构：

[1] Holography and Color-Imaging Laboratory, Fujitsu Laboratories Ltd., Atsugi, 243-01, Atsugi, 10-1, Morinosato-Waka- miya

来源：

APPLIED OPTICS | 1992年 / 31卷 / 11期

关键词：

FINGERPRINT SENSOR; HOLOGRAM; PERSONAL IDENTIFICATION; SECURITY;

D O I：

10.1364/AO.31.001794

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

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.

引用

页码：1794 / 1802

页数：9