Nippon Sheet Glass Company, Limited

Isao Muraguchi

Terufusa Kunisada

Yukinari Sekiguchi

Kenichi Nakama

Katsuhide Shimmo

A polarizing filter has a laminate structure: wherein one to four layers of first dielectric thin filmsand one to four layers of second dielectric thin filmsare alternately laminated on a transparent flat substrateto form the laminate structure, the layers of second dielectric thin filmshaving a refractive index lower than that of the first dielectric thin filmswith respect to the wavelength of incident light; wherein one layer of the third dielectric thin filmhaving a refractive index intermediate between the refractive indices of the first and second dielectric thin films with respect to the wavelength of incident light is laminated on a surface of the laminate structure. In an optical device using the polarizing filter, the angle of incidence is set to be in a range of from 20 to 70 degrees.

Polarizing filter and optical device using the same

A molding die having satisfactory releasability, a sol-gel composition produced using the molding die, and a process for producing a sol-gel composition. The molding die which is to be pressed against a sol-gel material for producing a sol-gel composition has a release film, e.g., a thin gold (Au) film, formed on the molding surface of the molding die through a buffer layer made of metals and/or inorganic oxides.

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Osaka, Japan

Isao Muraguchi