| US 7,550,707 B2 | ||
| Biometrics authentication system with authentication based upon multiple layers | ||
| Gakuji Hashimoto, Kanagawa (Japan); Kiyoshi Osato, Chiba (Japan); Isao Ichimura, Tokyo (Japan); Toshio Watanabe, Kanagawa (Japan); Takashi Nakao, Tokyo (Japan); Kenji Yamamoto, Kanagawa (Japan); Hideo Sato, Tokyo (Japan); Junji Kajihara, Tokyo (Japan); and Kengo Hayasaka, Tokyo (Japan) | ||
| Assigned to Sony Corporation, (Japan) | ||
| Filed on Feb. 25, 2008, as Appl. No. 12/71,638. | ||
| Claims priority of application No. 2007-051032 (JP), filed on Mar. 01, 2007. | ||
| Prior Publication US 2008/0211628 A1, Sep. 04, 2008 | ||
| Int. Cl. G08B 13/18 (2006.01); G06F 7/04 (2006.01) | ||
| U.S. Cl. 250—221 [340/5.82; 340/5.83] | 9 Claims |
| 1. A biometrics authentication system comprising:
a light source applying light to a living organism;
a microlens array section condensing light from the living organism, and including a plurality of microlenses each having
a different refractive power;
an image pickup device obtaining image pickup data on a plurality of layers of the living organism on the basis of the light
condensed by the microlens array section; and
an authentication section performing authentication of the living organism on the basis of the image pickup data on the plurality
of layers of the living organism; and
a voltage supplying section supplying a voltage to the microlens array section,
wherein the microlenses change their refractive powers according to a voltage supplied from the voltage supplying section,
and wherein the microlens array section includes:
a pair of substrates;
a pair of electrodes to which a voltage from the voltage supplying section is applied, the pair of electrodes being formed
on the substrates; and
a liquid crystal layer being arranged between the pair of electrodes, wherein
at least one of the pair of electrodes has a curved surface for forming the microlenses.
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