OPTICAL FILTER AND ANALYTICAL INSTRUMENT

摘要

An optical filter (1) comprises a first substrate (3); a second substrate (2) disposed so as to be opposed to the first substrate (3); a first mirror (4B) disposed between the first substrate (3) and the second substrate (2); a second mirror (4A) disposed between the first mirror (4B) and the second substrate(2); a first electrode (6B) disposed between the first substrate (3) and the second substrate (2); a second electrode (6A) disposed between the first electrode (6B) and the second substrate (2), wherein the second substrate has a groove (8) surrounding the second mirror (4A) in a plan view, the groove (8) includes a first curved surface (8b) between a first side surface (8c) and a bottom surface (8a), and the material of the first and second substrates (2, 3) is a glass.