Patent ID: 9678259
Date: 2017-06-13
CPC Classifications: G01J,G01N,G02B,Y10T

Claim:
1. An optical filter device comprising: an interference filter including a first substrate, a second substrate opposing the first substrate and joined to the first substrate, a first reflective film provided on the first substrate, and a second reflective film provided on the second substrate and opposing the first reflective film across an inter-reflective film gap; and a housing supporting the interference filter, wherein the housing includes a base substrate on which the interference filter is arranged, an adhesive member fixing the second substrate to the base substrate is arranged between the second substrate and the base substrate, and the second substrate is fixed to the base substrate by the adhesive member in one place excluding a region where the second reflective film is provided in a plan view such that the interference filter is supported in a cantilevered manner relative to the base substrate.