Patent ID: 9063325
Filing Date: 2015-06-23
Classification: G01J,G02B

Abstract:
1. A tunable interference filter comprising: a first substrate; a second substrate opposed to the first substrate; a first reflection film provided on a first reflection film fixing surface of the first substrate facing the second substrate; a second reflection film provided on a second reflection film fixing surface of the second substrate facing the first substrate and opposing the first reflection film across a gap between the first and second reflection films; and a first electrode provided on a first electrode surface of the first substrate facing the second substrate, the first electrode surrounding the first reflection film fixing surface in a plan view, and being spaced apart from the first reflection film fixing surface in a thickness direction of the first substrate, wherein the first electrode surface is spaced apart from the second substrate by a different distance than the distance from the first reflection film fixing surface to the second substrate, the first reflection film covers a step between the first reflection film fixing surface and the first electrode surface, and a layered part in which the first reflection film and the first electrode are stacked is provided on the first electrode surface, the layered part being spaced apart from the second substrate by a larger distance than the distance from the first reflection film fixing surface to the second substrate.