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:
Mar. 20, 2007
Filed:
Sep. 21, 2004
Naoki Ito, Miyagi-ken, JP;
Naoki Ito, Miyagi-ken, JP;
Alps Electric Co., Ltd., Tokyo, JP;
Abstract
An optical image reader includes a transparent light guide plate having an object placement surface, an illumination light source for emitting light to an end face of the plate, a holographic diffraction grating element disposed at a surface of the plate opposite to the object placement surface via a low refraction index layer, a sensor unit disposed near an end face of the diffraction grating element via a light-condensing optical system, and a control circuit connected to the diffraction grating element and sensor unit. The control circuit performs controlling so that linear areas to which an electrical field is applied are successively selected in the extension direction of the object placement surface, successively receives electrical signals output in linear area units from the sensor unit, converts them into pieces of linear image information, and joins these pieces of linear image information to produce a two-dimensional image.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile