The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 25, 2023
Filed:
Mar. 04, 2020
Agc Inc., Chiyoda-ku, JP;
Kazuhiko Shiono, Fukushima, JP;
Nanako Nishimoto, Fukushima, JP;
Sayuri Yamada, Fukushima, JP;
Hiroki Hotaka, Fukushima, JP;
Satoshi Okada, Tokyo, JP;
Keigo Matsuura, Tokyo, JP;
AGC Inc., Chiyoda-ku, JP;
Abstract
An optical filter includes: an absorption layer including a first near-infrared absorbing dye (D1), a second near-infrared absorbing dye (D2), and a transparent resin; and a reflection layer including a dielectric multilayer film. The dye (D1) and the dye (D2) are squarylium compounds satisfying following (1) to (3). (1) The dye (D1) has a maximum absorption wavelength λwithin a range of 680 to 730 nm, and the difference between a wavelength at which a transmittance is 80% on the shorter wavelength side than λwhen the concentration is adjusted such that a transmittance at λis 10%, and λis 100 nm or less. (2) The dye (D2) has a maximum absorption wavelength λwithin a range of 720 to 770 nm. (3) A value obtained by subtracting λfrom λis 30 nm or more and 85 nm or less.