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. 27, 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 illumination device has an optical device and an irradiation unit. The irradiation unit has a light source 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. The light source has light sources emitting a plurality of coherent light beams having an identical wavelength range, the hologram recording medium has a recording area to be scanned with each of a plurality of coherent light beams reflected by the scanning device, and the recording area has an interference fringe that diffracts an incident coherent light beam. The optical device uses the plurality of coherent light beams diffracted by the interference fringe of the recording area so that each of the coherent light beams diffracted by the hologram recording medium is superimposed on at least one portion to reproduce the image of the reference member.