The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 21, 2012
Filed:
Jun. 30, 2005
Akio Nagasaka, Kokubunji, JP;
Takafumi Miyatake, Hachioji, JP;
Naoto Miura, Kokubunji, JP;
Yuichi Kashimura, Hitachinaka, JP;
Akio Nagasaka, Kokubunji, JP;
Takafumi Miyatake, Hachioji, JP;
Naoto Miura, Kokubunji, JP;
Yuichi Kashimura, Hitachinaka, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A compact authentication device that prevents user from feeling pressure and is strong against external light, when capturing an image of a finger blood vessel pattern with transmitted light. The device includes a guidance part for determining the finger position, a light source disposed on at least one side of the guidance part to emit light to be transmitted though the finger, an image capture part for capturing the transmitted light, a shading unit for limiting an irradiation region of the light, a finger thickness measuring unit, a unit for controlling a light amount of the light source based on a result of the measurement, a unit for recording registered image patterns of the finger, a unit for collating a captured image pattern from the image capture part with the registered patterns, and a unit for controlling different processing according to the collation result.