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:
Jun. 28, 2016
Filed:
Sep. 08, 2011
Makio Kurashige, Kashiwa, JP;
Kazutoshi Ishida, Saitama, JP;
Tomoe Takanokura, Katsushika-Ku, JP;
Yasuyuki Ooyagi, Funabashi, JP;
Makio Kurashige, Kashiwa, JP;
Kazutoshi Ishida, Saitama, JP;
Tomoe Takanokura, Katsushika-Ku, JP;
Yasuyuki Ooyagi, Funabashi, JP;
Dai Nippon Printing Co., Ltd., Shinjuku-Ku, JP;
Abstract
An optical device including a hologram recording medium that can reproduce an image of a reference member and an irradiation unit that emits a coherent light beam to the optical device. The irradiation unit includes a light source for emitting a coherent light beam and a scanning device capable of adjusting a reflection angle of the coherent light beam emitted from the light source and that makes a reflected coherent light beam scan the hologram recording medium. The light source has light sources for emitting coherent light beams having different wavelength ranges. The hologram recording medium has a plurality of recording areas to be scanned with a plurality of coherent light beams reflected by the scanning device, respectively. Each of the plurality of recording areas has an interference fringe that diffracts a coherent light beam of the corresponding wavelength range.