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Title:
ILLUMINATION DEVICE, METHOD OF DESIGNING ILLUMINATION DEVICE, AND DESIGNING DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/156244
Kind Code:
A1
Abstract:
Provided is an illumination device for projecting a projection pattern including information onto a projection surface. The illumination device is provided with: a light source for emitting coherent light; and a diffracting optical element which projects a projection pattern by diffracting the coherent light from the light source. The diffracting optical element has diffraction characteristics such that predetermined information is visually recognized with a predetermined size, shape, and inclination angle when an observer has turned his or her line of view from a viewpoint position to a first line of view direction with reference to the position and direction of the diffracting optical element.

Inventors:
KURASHIGE Makio (1-1, Ichigaya-kaga-cho 1-chome, Shinjuku-k, Tokyo 01, 〒1628001, JP)
NISHIO Shumpei (1-1, Ichigaya-kaga-cho 1-chome, Shinjuku-k, Tokyo 01, 〒1628001, JP)
NAKAI Toshiyuki (1-1, Ichigaya-kaga-cho 1-chome, Shinjuku-k, Tokyo 01, 〒1628001, JP)
Application Number:
JP2019/004739
Publication Date:
August 15, 2019
Filing Date:
February 08, 2019
Export Citation:
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Assignee:
DAI NIPPON PRINTING CO., LTD. (1-1 Ichigaya-kaga-cho 1-chome, Shinjuku-ku Tokyo, 01, 〒1628001, JP)
International Classes:
F21S2/00; F21V5/00; F21V13/12; G02B5/18; G02B27/30; G09F19/12; B60Q1/52; F21S41/16; F21W103/60; F21W111/02; F21W111/04; F21W111/06; F21Y115/30
Domestic Patent References:
WO2017217420A12017-12-21
Foreign References:
JP2016101797A2016-06-02
JP2016055691A2016-04-21
Attorney, Agent or Firm:
NAGAI Hiroshi et al. (Kyowa Patent & Law Office, Nippon Life Marunouchi Building1-6-6, Marunouchi, Chiyoda-k, Tokyo 05, 〒1000005, JP)
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