Title:
OPTICAL FILTER AND NEAR-INFRARED CUT FILTER
Document Type and Number:
WIPO Patent Application WO/2023/079973
Kind Code:
A1
Abstract:
The present invention comprises a pair of translucent surfaces facing each other in a plate thickness direction, and an outer peripheral surface extending in the plate thickness direction from the pair of translucent surfaces. This optical filter comprises a glass plate and a protective film that covers the glass plate. The protective film forms the pair of translucent surfaces and the outer peripheral surface. A ridge-line part forming a boundary between the translucent surfaces and the outer peripheral surface has a curved surface shape. The ridge-line part has a plurality of dimples. The present invention is characterized in that the minimum value of the radius of curvature of bottom surfaces of dimples present on an arbitrary line segment having a length of 200 µm along the outer periphery of the translucent surfaces in the ridge-line part is 5 µm or greater.
Inventors:
SAKAGAMI TAKAHIRO (JP)
NAGATA TAKASHI (JP)
KAMIJYO KATSUSHI (JP)
MITSUDA TAKAHIRO (JP)
YAMAUCHI MASATAKA (JP)
NAGATA TAKASHI (JP)
KAMIJYO KATSUSHI (JP)
MITSUDA TAKAHIRO (JP)
YAMAUCHI MASATAKA (JP)
Application Number:
PCT/JP2022/039151
Publication Date:
May 11, 2023
Filing Date:
October 20, 2022
Export Citation:
Assignee:
AGC INC (JP)
International Classes:
G02B5/26; C03C3/17; C03C17/245; G02B1/00; G02B1/115; G02B5/22; G02B5/28; G03B11/00
Domestic Patent References:
| WO2019065100A1 | 2019-04-04 |
Foreign References:
| JP2010168262A | 2010-08-05 | |||
| JP2014208577A | 2014-11-06 | |||
| JP2019199391A | 2019-11-21 | |||
| JP2018188354A | 2018-11-29 | |||
| JPH04139035A | 1992-05-13 |
Attorney, Agent or Firm:
ITOH, Tadashige et al. (JP)
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