18982967. OPTICAL FILTER AND IMAGING APPARATUS (AGC Inc.)
OPTICAL FILTER AND IMAGING APPARATUS
Organization Name
Inventor(s)
Kazuhiko Shiono of Fukushima JP
Yayoi Yamamori of Fukushima JP
Takahiro Sakagami of Shizuoka JP
Katsushi Kamijyo of Shizuoka JP
OPTICAL FILTER AND IMAGING APPARATUS
This abstract first appeared for US patent application 18982967 titled 'OPTICAL FILTER AND IMAGING APPARATUS
Original Abstract Submitted
An optical filter includes a glass substrate having a first main surface, a second main surface opposite the first main surface, and an end surface connecting the first and second main surfaces, the glass substrate being a phosphate glass containing an absorbent, and a first antireflection layer disposed directly or indirectly on the first main surface of the glass substrate, wherein the first main surface of the glass substrate is coated with a first inorganic film, and a second inorganic film is provided directly or indirectly on the second main surface of the glass substrate, with the end surface being coated with a third inorganic film, and wherein the first inorganic film is a film that is closest to the glass substrate among films constituting the first antireflection layer, or a film that is different from a film composed of a plurality of films constituting the first antireflection layer.