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:
Sep. 16, 2014
Filed:
Apr. 11, 2012
Keiichi Matsuzaki, Kyoto, JP;
Kousei Sano, Osaka, JP;
Hidenori Wada, Kyoto, JP;
Tatsuya Takaoka, Osaka, JP;
Keiichi Matsuzaki, Kyoto, JP;
Kousei Sano, Osaka, JP;
Hidenori Wada, Kyoto, JP;
Tatsuya Takaoka, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
An optical information device is provided with a first scattering medium (), a second scattering medium (), a third scattering medium (); a diffraction element () which generates a plurality of light beams; an objective lens () which guides, to the first scattering medium () and to the third scattering medium () out of the first scattering medium (), the second scattering medium (), and the third scattering medium (), two light beams out of the plurality of the light beams; and an arithmetic circuit () which detects a gap interval between the first scattering medium () and the third scattering medium (), and an information medium (), based on a change in an amount of reflected light from the first scattering medium () and from the third scattering medium ().