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. 29, 2025
Filed:
Feb. 28, 2025
Agc Inc., Tokyo, JP;
Kazuhiko Shiono, Fukushima, JP;
Takuro Shimada, Fukushima, JP;
Yuichiro Orita, Fukushima, JP;
Kiyokazu Endo, Fukushima, JP;
Takahiro Sakagami, Shizuoka, JP;
Takashi Nagata, Shizuoka, JP;
Katsushi Kamijyo, Shizuoka, JP;
AGC Inc., Tokyo, JP;
Abstract
An optical filter includes a first dielectric multilayer film, a resin film, a phosphate glass, and a second dielectric multilayer film. The second dielectric multilayer film includes at least one Hlayer satisfying a refractive index of 1.8 or more and 2.5 or less and a QWOT of 1.1 or more and 3.5 or less, when a layer closest to the phosphate glass in the Hlayers is defined as a first Hlayer, the second dielectric multilayer film comprises a first Mlayer comprising a single layer satisfying a QWOT of 1.2 or more and 1.8 or less or a plurality of layers satisfying a total QWOT of 1.2 or more and 1.8 or less between the first Hlayer and the phosphate glass, and the optical filter satisfies all of the spectral characteristics (i-1) to (i-4).