Abstract: A three-dimensional image projector includes: a conversion optical system including a plate-shaped first optical member that has an incidence surface is incident, and an emission surface and that converts a traveling direction of the image light so as to form a predetermined angle between the emission surface and an emission direction of the image light on the emission surface; a rotary driving unit that drives the conversion optical system so as to rotate along the emission surface with a predetermined point on the emission surface as the center of rotation; and an image projection unit that is erected along a rotation axis, converts the traveling direction of the image light emitted from the conversion optical system into a first direction along a surface crossing the rotation axis, and diffuses the image light emitted from the conversion optical system in a second direction along the rotation axis.
Type:
Grant
Filed:
September 13, 2012
Date of Patent:
December 6, 2016
Assignees:
National University Corporation TOYOHASHI UNIVERSITY OF TECHNOLOGY, HolyMine Corporation
Inventors:
Hideyoshi Horimai, Mitsuteru Inoue, Pang Boey Lim
Abstract: A three-dimensional image projector includes: a conversion optical system including a plate-shaped first optical member that has an incidence surface is incident, and an emission surface and that converts a traveling direction of the image light so as to form a predetermined angle between the emission surface and an emission direction of the image light on the emission surface; a rotary driving unit that drives the conversion optical system so as to rotate along the emission surface with a predetermined point on the emission surface as the center of rotation; and an image projection unit that is erected along a rotation axis, converts the traveling direction of the image light emitted from the conversion optical system into a first direction along a surface crossing the rotation axis, and diffuses the image light emitted from the conversion optical system in a second direction along the rotation axis.
Type:
Application
Filed:
September 13, 2012
Publication date:
October 16, 2014
Applicants:
National University Corporation TOYOHASHI UNIVERSITY OF TECHNOLOGY, HOLYMINE CORPORATION
Inventors:
Hideyoshi Horimai, Mitsuteru Inoue, Pang Boey Lim
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.
Abstract: Provided is a three-dimensional image projector capable of displaying a highly reproducible three-dimensional image in response to changes in a viewer's position and easily accomplishing system downsizing.
Type:
Application
Filed:
March 1, 2010
Publication date:
March 15, 2012
Applicants:
HolyMine Corporation, National University Corporation TOYOHASHI UNIVERSITY OF TECHNOLOGY
Inventors:
Mitsuteru Inoue, Pang Boey Lim, Hideyoshi Horimai
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 1 includes a projection image forming disc 4 in which a hologram recording medium 9 is formed along a disc-shaped glass substrate 8a, and which projects image light having directivity by causing the image light to fall incident on the hologram recording medium 9, and a rotational drive unit 3 for rotationally driving the projection image forming disc 4 along a surface of the glass substrate 8a with the center point C1 on the surface as a rotation center. The projection image forming disc 4 is preliminarily recorded with a hologram 11 by causing two laser beams L2, L3 as reference light and object light to simultaneously fall incident on the hologram recording medium 9.