Title:
LIGHTING DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/276257
Kind Code:
A1
Abstract:
This lighting device comprises a housing, a first light source, and a first lens optical system. The housing has an opening. The first light source has a first emission unit that emits a first light in the internal space of the housing. The first lens optical system includes at least one first lens in the first light path that is positioned between the first emission unit and the opening of the housing, performs image formation of the first light from the first emission unit on a virtual image surface of the opening side, and emits the first light from the opening. The angle that defines the numerical aperture of the first lens optical system is greater than or equal to the spread angle of the first light from the first emission unit.
Inventors:
TAKEUCHI ERI (JP)
Application Number:
PCT/JP2022/006911
Publication Date:
January 05, 2023
Filing Date:
February 21, 2022
Export Citation:
Assignee:
KYOCERA CORP (JP)
International Classes:
F21S8/02; F21V13/12; G02B1/118; G02B5/00; G02B7/02; G02B7/04; F21Y115/30
Foreign References:
| US10415799B1 | 2019-09-17 | |||
| JP2017069110A | 2017-04-06 |
Attorney, Agent or Firm:
YOSHITAKE Hidetoshi et al. (JP)
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