Patent ID: 9664890
Date: 2017-05-30
CPC Classifications: G01J,G02B

Claim:
1. A variable wavelength interference filter comprising: a first substrate; a second substrate that faces the first substrate; a first reflective film that is disposed between the first substrate and the second substrate; a second reflective film that is disposed between the first reflective film and the second substrate, a gap existing between the first reflective film and the second reflective film; a first electrode that is disposed between the first substrate and the second substrate; a second electrode that is disposed between the first electrode and the second substrate; the second substrate having a first portion and a second portion, the second portion being disposed so as to surround the first portion, the first portion having a first face and a second face, and the second portion having a third face and a fourth face, the first face continuing to the third face, the first face being opposed to the first substrate and the second face, the third face being opposed to the first substrate and the fourth face, and a first distance between the first face and the second face being larger than a second distance between the third face and the fourth face, the second electrode being disposed between the second face and the first substrate, looking from a direction from the first substrate toward the second substrate, the second reflective film, the first electrode, and the second electrode overlapping to the first portion.