Title:
光学装置および照明装置
Document Type and Number:
Japanese Patent JP7316518
Kind Code:
B2
Abstract:
An optical device includes: a plurality of walls including at least a first wall and a second wall, wherein the plurality of walls are concentrically disposed around a first axis so as to be multi-stepped along the first axis, wherein each of the plurality of walls expands outward in a sector shape around the first axis at a predetermined central angle θ and includes an outer circumferential surface, a reflective curved surface at the outer circumferential surface, a first side end portion, and a second side end portion; a first reflective surface meeting the first side end portions of the walls; and a second reflective surface meeting the second side end portions of the walls. The first reflective surface and the second reflective surface meet each other on the first axis.
Inventors:
Takanori Ariga
Teru Nagahashi
Teru Nagahashi
Application Number:
JP2019195932A
Publication Date:
July 28, 2023
Filing Date:
October 29, 2019
Export Citation:
Assignee:
Nichia Corporation
International Classes:
F21S2/00; F21S8/08; F21V7/00; F21V7/04; F21V7/09; F21V7/10
Domestic Patent References:
| JP3173449U | ||||
| JP2014160581A |
Foreign References:
| CN204647968U | ||||
| US20110140149 |
Attorney, Agent or Firm:
Akira Imai