Patent ID: 8937276
Filing Date: 2015-01-20
Classification: G02B

Abstract:
1. An optical filter comprising: a first substrate having a single flat surface; a second substrate including a first surface, a second surface and a third surface, the second surface surrounding the first surface in a plan view, the third surface surrounding the second surface in a plan view, a second height of the second surface being lower than a first height of the first surface, a third height of the third surface being higher than the first height of the first surface, the first surface, the second surface, and the third surface facing the single flat surface of the first substrate; a first mirror disposed on the first substrate; a second mirror disposed on the first surface of the second substrate, the second mirror facing the first mirror; a first electrode disposed on the first substrate; and a second electrode disposed on the second surface of the second substrate, the second electrode facing the first electrode.