Invention Grant
- Patent Title: Illumination device
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Application No.: US18003002Application Date: 2021-06-14
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Publication No.: US11892154B2Publication Date: 2024-02-06
- Inventor: Keiji Tsunetomo , Satoru Kusaka
- Applicant: NIPPON SHEET GLASS COMPANY, LIMITED
- Applicant Address: JP Tokyo
- Assignee: NIPPON SHEET GLASS COMPANY, LIMITED
- Current Assignee: NIPPON SHEET GLASS COMPANY, LIMITED
- Current Assignee Address: JP Tokyo
- Agency: Lucas & Mercanti,LLP
- Priority: JP 20117627 2020.07.08
- International Application: PCT/JP2021/022491 2021.06.14
- International Announcement: WO2022/009615A 2022.01.13
- Date entered country: 2022-12-22
- Main IPC: F21V5/00
- IPC: F21V5/00 ; F21Y115/10

Abstract:
Provided is a illumination device having a sufficiently wide irradiation angle and a uniform light intensity within a predetermined range even when using a light source that emits light similar to light with a small spread angle, such as a laser, or to parallel light. This illumination device includes a light source including at least one light emitting portion; a first optical element that receives light output from the light source and outputs the light while expanding an output angle thereof and a second optical element that receives light output from the first optical element and outputs the light while further expanding an irradiation angle thereof.
Public/Granted literature
- US20230258312A1 ILLUMINATION DEVICE Public/Granted day:2023-08-17
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