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. 11, 2013
Filed:
Mar. 12, 2009
Hideyoshi Horimai, Numazu, JP;
Hideyoshi Horimai, Numazu, JP;
Holymine Corporation, Kanagawa, JP;
Abstract
An object of the present invention is to display a highly reproducible three-dimensional image in response to changes in the viewer's position and to easily realize the miniaturization of the system. The three-dimensional image projector includes a projection image forming disc in which a hologram recording medium is formed along a disc-shaped glass substrate, and which projects image light having directivity by causing the image light to fall incident on the hologram recording medium, and a rotational drive unit for rotationally driving the projection image forming disc along a surface of the glass substrate with the center point on the surface as a rotation center. The projection image forming disc is preliminarily recorded with a hologram by causing two laser beams as reference light and object light to simultaneously fall incident on the hologram recording medium.