CPC G02B 5/285 (2013.01) [C03C 17/22 (2013.01); C03C 17/3482 (2013.01); C23C 14/0036 (2013.01); C23C 14/10 (2013.01); C23C 14/185 (2013.01); C23C 14/34 (2013.01); C23C 14/5846 (2013.01); G02B 1/113 (2013.01); C03C 2217/734 (2013.01); C03C 2218/154 (2013.01); C03C 2218/155 (2013.01); G02B 5/281 (2013.01)] | 6 Claims |
1. An optical filter comprising a hydrogenated silicon-containing film, wherein in a Raman spectrum of the hydrogenated silicon-containing film measured by Raman spectroscopy a ratio (SiH/SiH2) obtained from a ratio between an area of a peak derived from SiH and an area of a peak derived from SiH2 is 0.7 or more.
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