Title:
OPTICAL MEMBER AND ILLUMINATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2024/034458
Kind Code:
A1
Abstract:
Provided are an optical member and an illumination device that make it possible to achieve a uniform light allocation distribution in a predetermined direction, and improved light utilization efficiency. An optical member (113) comprises a light incident surface on which light is incident, and a light exit surface disposed opposite the light incident surface. The light incident surface and the light exit surface are formed along a predetermined direction. The optical member (113) includes a central region (113a) positioned at the center in the predetermined direction, and side regions (113b) that are positioned on both sides of the central region (113a) along the predetermined direction. The central region (113a) has a negative optical power, and the side regions (113b) have a positive optical power.
Inventors:
NOMURA KEIICHIRO (JP)
TOYOSHIMA TAKANOBU (JP)
TOYOSHIMA TAKANOBU (JP)
Application Number:
PCT/JP2023/028084
Publication Date:
February 15, 2024
Filing Date:
August 01, 2023
Export Citation:
Assignee:
KOITO MFG CO LTD (JP)
International Classes:
F21V5/04; F21S2/00; G02B3/00
Foreign References:
| JP2006286608A | 2006-10-19 | |||
| JP2017536564A | 2017-12-07 | |||
| JP2021189306A | 2021-12-13 |
Attorney, Agent or Firm:
FUJIOKA, Takahiro (JP)
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