Title:
Optical scanning equipment, lighting equipment, projection equipment and optical elements
Document Type and Number:
Japanese Patent JP6323743
Kind Code:
B2
Abstract:
An illumination device includes a diffusion member having an anisotropic diffusion surface, a rotary shaft member configured to rotate the anisotropic diffusion surface while a coherent light beam from a light source is illuminated on the anisotropic diffusion surface, and an optical device that further diffuses a coherent light beam diffused on the anisotropic diffusion surface, wherein the coherent light beam diffused on the anisotropic diffusion surface is diffused in a form of line and the diffused coherent light beam in the form of line is configured to move to draw a locus of rotation in one direction in accordance with the rotation of the anisotropic diffusion surface.
Inventors:
Kurashige Makio
Application Number:
JP2013258483A
Publication Date:
May 16, 2018
Filing Date:
December 13, 2013
Export Citation:
Assignee:
Dai Nippon Printing Co.,Ltd.
International Classes:
G02B26/10; G02B19/00; G03B21/14
Domestic Patent References:
| JP2012123381A | ||||
| JP2012237810A | ||||
| JP2012230360A | ||||
| JP2010169828A | ||||
| JP2012237811A | ||||
| JP7013094A |
Foreign References:
| US20050083560 | ||||
| US6913358 |
Attorney, Agent or Firm:
Hiroyuki Nagai
Hirohito Katsunuma
Yukihiro Hotta
Yasushi Kawasaki
Hirohito Katsunuma
Yukihiro Hotta
Yasushi Kawasaki