Title:
OPTICAL ELEMENT PROVIDED WITH ATTENUATION REGION, AND MANUFACTURING METHOD THEREOF
Document Type and Number:
WIPO Patent Application WO/2023/276026
Kind Code:
A1
Abstract:
An optical element is provided which optically couples a light-receiving element and light-emitting element that functions as a light source, and which can be easily manufactured and realizes a desired attenuation rate with high precision. This optical element is provided with an incident surface (S1) configured opposite of the light source and an exit surface (S2) configured opposite of said light-receiving element so as to optically couple the light source (L0) and the light-receiving element which receives light from the light source, wherein the light incident from the light source onto the incident surface forms a first image (L1) of the light source inside the optical element, and forms a second image (L2) of the light source after emission from the exit surface, and, near the position where said first image (L1) is formed, the optical element has an attenuation region that reduces the amount of transmitted light.
Inventors:
MAKI HISASHI (JP)
MOROZUMI KAIRI (JP)
ZENKO TETSUYA (JP)
HORIKIRI HIRONORI (JP)
FUJIOKA TAKAHIRO (JP)
MOROZUMI KAIRI (JP)
ZENKO TETSUYA (JP)
HORIKIRI HIRONORI (JP)
FUJIOKA TAKAHIRO (JP)
Application Number:
PCT/JP2021/024699
Publication Date:
January 05, 2023
Filing Date:
June 30, 2021
Export Citation:
Assignee:
NALUX CO LTD (JP)
International Classes:
G02B6/42; G02B6/26; G02B6/32
Domestic Patent References:
| WO2020100283A1 | 2020-05-22 |
Foreign References:
| JP2001264586A | 2001-09-26 | |||
| JPH02244012A | 1990-09-28 | |||
| JPS54127340A | 1979-10-03 | |||
| JP2008268755A | 2008-11-06 | |||
| US20180177404A1 | 2018-06-28 |
Attorney, Agent or Firm:
FUSHIMI, Naoya (JP)
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