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:
Dec. 26, 2017
Filed:
Apr. 07, 2016
Dai Nippon Printing Co., Ltd., Tokyo, JP;
Makio Kurashige, Tokyo, JP;
Kazutoshi Ishida, Tokyo, JP;
Tomoe Takanokura, Tokyo, JP;
Yasuyuki Oyagi, Tokyo, JP;
DAI NIPPON PRINTING CO., LTD., Tokyo, JP;
Abstract
A laser beam (L) generated by a laser light source () is reflected by a light beam scanning device () and irradiated onto a hologram recording medium (). On the hologram recording medium (), an image () of a scatter plate is recorded as a hologram by using reference light that converges on a scanning origin (B). The light beam scanning device () bends the laser beam (L) at the scanning origin (B) and irradiates the laser beam onto the hologram recording medium (). At this time, scanning is carried out by changing a bending mode of the laser beam with time so that an irradiation position of the bent laser beam (L) on the hologram recording medium () changes with time. Regardless of an irradiation position of the beam, diffracted light (L) from the hologram recording medium () produces a reproduction image () of the scatter plate on the spatial light modulator (). The modulated image of the spatial light modulator () is projected onto a screen () by a projection optical system ().