Title:
OPTICAL FILTER
Document Type and Number:
WIPO Patent Application WO/2023/210474
Kind Code:
A1
Abstract:
The present invention relates to an optical filter comprising: a light-absorbing material having the maximum absorption wavelength in a wavelength region shorter than 800 nm; a light-absorbing material having the maximum absorption wavelength in a wavelength region longer than 850 nm; and a dielectric multilayer film, wherein the optical filter satisfies the following optical properties (i-4) and (i-5). (i-4) The maximum transmittance is 60% or more in a wavelength range from 800-1000 nm (i-5) In a wavelength range longer than a wavelength having the maximum transmittance in the range from 800-1000 nm, an absolute value of a difference between a wavelength at which the transmittance is 50% at an incident angle of 0° and a wavelength at which the transmittance is 50% at an incident angle of 35°is 15 nm or less
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Inventors:
NAKAYAMA MOTOSHI (JP)
SAKAGAMI TAKAHIRO (JP)
NAGATA TAKASHI (JP)
SHIONO KAZUHIKO (JP)
SAKAGAMI TAKAHIRO (JP)
NAGATA TAKASHI (JP)
SHIONO KAZUHIKO (JP)
Application Number:
PCT/JP2023/015699
Publication Date:
November 02, 2023
Filing Date:
April 19, 2023
Export Citation:
Assignee:
AGC INC (JP)
International Classes:
G02B5/22; C03C4/08; C09K3/00; G02B1/115; G02B5/26; G02B5/28; G03B11/00
Domestic Patent References:
| WO2018155634A1 | 2018-08-30 | |||
| WO2018043500A1 | 2018-03-08 | |||
| WO2017030174A1 | 2017-02-23 | |||
| WO2022075291A1 | 2022-04-14 | |||
| WO2015056734A1 | 2015-04-23 |
Foreign References:
| JP2017216678A | 2017-12-07 | |||
| JP2021006901A | 2021-01-21 |
Attorney, Agent or Firm:
EIKOH, P.C. (JP)
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