Agc Inc.

Optical Coatings Japan

Yosuke Sugihara

Yusuke Mori

Yasuyuki Takimoto

Takahiro Mashimo

Hideaki Takahoshi

Naoto Tatsuoka

Masaaki Miyake

An optical filter includes a substrate and a dielectric multilayer film laid as an outermost layer on at least one major surface of the substrate. The dielectric multilayer film includes a low-refractive index film and a high-refractive index film provided alternately. At least one film selected from the group consisting of the low-refractive index film and the high-refractive index film satisfies the following optical characteristics (i-1) and (i-2A): (i-1) an extinction coefficient kat a wavelength of 600 nm is 0.12 or larger; and (i-2A) a minimum extinction coefficient kin a wavelength range of 1530 to 1570 nm is 0.01 or smaller; and the optical filter satisfies the following optical characteristic (ii-1A): (ii-1A) light in a wavelength range of 400 to 680 nm is blocked and light in the wavelength range of 1530 to 1570 nm is transmitted.

Optical filter

Growing community of inventors

Tokyo, Japan

Yosuke Sugihara