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Patent Searching and Data


Title:
OPTICAL FILTER AND IMAGING DEVICE
Document Type and Number:
WIPO Patent Application WO/2020/054786
Kind Code:
A1
Abstract:
The present invention relates to an optical filter which has a resin substrate with a thickness of 20-110 μm, an absorption layer with a thickness of 0.25-12 μm, and a near-infrared reflection layer that is a dielectric multi-layer film, wherein: the resin substrate includes a transparent resin with a Tg of 170°C or higher, satisfies specific average internal transmittance and minimum internal transmittance at a specific wavelength, and within wavelengths of 500 nm or less, a wavelength at which the internal transmittance becomes 90% is 350 nm or less; and the absorption layer has a maximum absorption wavelength of 680-745 nm in a transparent resin, and includes a near infrared ray absorbing pigment (A) having an average internal transmittance of 94% or more at a specific wavelength, and a transparent resin with a Tg of 170°C or higher.

Inventors:
SHIONO KAZUHIKO (JP)
NAKAYAMA MOTOSHI (JP)
YOKOTE TATSUO (JP)
ITO AYA (JP)
Application Number:
PCT/JP2019/035779
Publication Date:
March 19, 2020
Filing Date:
September 11, 2019
Export Citation:
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Assignee:
AGC INC (JP)
International Classes:
G02B5/22; G02B5/26; G02B5/28; H01L27/146
Domestic Patent References:
WO2017135359A12017-08-10
WO2017094858A12017-06-08
WO2015056734A12015-04-23
Foreign References:
JP2002372603A2002-12-26
JP2018084647A2018-05-31
Attorney, Agent or Firm:
EIKOH PATENT FIRM, P.C. (JP)
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