Title:
LIGHTING DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/009615
Kind Code:
A1
Abstract:
Provided is a lighting device having a sufficiently wide irradiation angle and a uniform light intensity within a prescribed range even in the case in which light having a small spread angle, such as laser light, or a light source similar to a collimated light source is used. This lighting device includes: a light source having at least one light-emitting part; a first optical element that receives light emitted from the light source and that emits the light with an expanded emission angle; and a second optical element that receives the light emitted from the first optical element and that emits the light with a further expanded irradiation angle.
Inventors:
TSUNETOMO KEIJI (JP)
KUSAKA SATORU (JP)
KUSAKA SATORU (JP)
Application Number:
PCT/JP2021/022491
Publication Date:
January 13, 2022
Filing Date:
June 14, 2021
Export Citation:
Assignee:
NIPPON SHEET GLASS CO LTD (JP)
International Classes:
G02B19/00; F21S2/00; F21V5/00; F21V5/04; G02B3/00; F21Y115/10; F21Y115/30
Domestic Patent References:
| WO2018146889A1 | 2018-08-16 |
Foreign References:
| JP2016510130A | 2016-04-04 | |||
| JP2004184612A | 2004-07-02 | |||
| US20170122728A1 | 2017-05-04 | |||
| JP2019220266A | 2019-12-26 | |||
| JP2009510731A | 2009-03-12 |
Attorney, Agent or Firm:
HIRAKI & ASSOCIATES (JP)
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