Nippon Electric Glass Co., Ltd.

Tohoku University

Masaaki Imura

Toshimasa Kanai

Keiichi Sahara

Hitoshi Takamura

Tsutomu Imamura

Yusuke Yamazaki

Yasutaka Tanabe

Mina Yamaguchi

Akihiro Ishii

Takako Tojo

Provided is an optical filter capable of reducing the dependency on the angle of light incidence. An optical filterincludes a hydrogenated silicon-containing film, wherein in a Raman spectrum of the hydrogenated silicon-containing filmmeasured by Raman spectroscopy a ratio (SiH/SiH) obtained from a ratio between an area of a peak derived from SiH and an area of a peak derived from SiHis 0.7 or more.

Optical filter and method for manufacturing same

Provided is a film-covered transparent base plate having an excellent aesthetic appearance even during turn-off of a light source. A film-covered transparent base plateincludes a transparent base plateand a light-absorbing filmprovided on one principal surfaceof the transparent base plateand the light-absorbing filmincludes a dielectric phase made of a material having a band gap of not less than 2.0 eV and not more than 2.7 eV and a metallic phase.

Film-covered transparent base plate and top plate for cooking device

Provided are: a band-pass filter for which filter characteristics can be improved; and a manufacturing method therefor. A band-pass filter, which allows light of a specific wavelength region to pass, includes: a substratewhich has light transmitting properties; a first dielectric multilayer filmthat is provided on a first main surface Sof the substrate; and a second dielectric multilayer filmthat is provided on a second main surface Swhich is opposite the first main surface S. The first dielectric multilayer filmcontains a hydrogenated silicon layer. The second dielectric multilayer filmcontains a hydrogenated silicon layer.

Band-pass filter and manufacturing method therefor

Growing community of inventors

Otsu, Japan

Masaaki Imura