Wavelength variable interference filter

Abstract

A wavelength variable interference filter includes a first board including a first reflective film and a first bonding region positioned around the first reflective film and a second board including a second reflective film that opposes the first reflective film in a first direction therebetween and a second bonding region that is positioned around the second reflective film, wherein the first bonding region has a first flat and a first taper inclined with respect to the first flat, the second bonding region has a second flat opposing the first flat in the first direction and a second taper inclined with respect to the second flat, and the first board and the second board are bonded to each other by bonding at least the first flat and the second flat to each other in a state where the first taper and the second taper are in contact with each other.

Dependencies are inferred from the claim text.