专利名称：OPTICAL FILTER AND OPTICAL DEVICE发明人：UCHIYAMA, Masayuki,YANAGI, Michio申请号：EP12785144.2申请日：20120517公开号：EP2711744A1公开日：20140326
专利附图：
摘要：There is provided an optical filter of the type having absorption and with lowreflection, which includes a light-transmitting substrate; and a light-absorbing gradientrefractive index thin film provided on the substrate and whose refractive index changes soas to be close to the refractive index of the substrate toward the substrate side in a film
thickness direction. There is also provided an optical apparatus using the optical filter.
申请人：Canon Denshi Kabushiki Kaisha
地址：1248 Shimokagemori Chichibu-shi, Saitama 369-1892 JP
国籍：JP
代理机构：TBK
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