Patent ID: 9557554
Date: 2017-01-31
CPC Classifications: G02B

Claim:
1. A wavelength-variable interference filter comprising: a movable substrate that includes a movable portion and a connection portion surrounding the movable portion, the movable substrate having first and second surfaces opposite to each other; a reflector that is disposed on the first surface of the movable substrate; an electrode that is disposed on the first surface of the movable substrate; and a warp preventing member that is disposed on the second surface of the movable substrate, wherein a perimeter of the warp preventing member is inwardly spaced apart from a perimeter of the movable portion in a plan view so that the warp preventing member overlaps with the movable portion in the plan view, an area of the reflector when viewed in plan is less than an area of the warp preventing member, and when a bending moment of the reflector acting on the movable substrate is M