Patent ID: 9335537
Filing Date: 2016-05-10
CPC Classification: G02B

Claim Text:
1. A variable wavelength interference filter comprising: a first substrate including a first electrode and a second electrode; a second substrate opposed to the first substrate, the second substrate including a third electrode and a fourth electrode, the third and fourth electrodes being opposed to the first and second electrodes, respectively; a first reflecting film provided to the first substrate; a second reflecting film provided to the second substrate, and opposed to the first reflecting film across a gap; a first actuator including the first electrode and the third electrode disposed outside an optical interference region where the first reflecting film and the second reflecting film overlap each other in a plan view of the first substrate and the second substrate, the first actuator selectively varying the gap between the first reflecting film and the second reflecting film; and a second actuator including the second electrode and the fourth electrode disposed outside the optical interference region in the plan view, and driven independently of the first actuator to vary the gap, wherein the first actuator has a plurality of first partial actuators disposed at regular angular intervals with respect to a point in the optical interference region, the first partial actuators having the same shape as each other in the plan view and being disposed at the same distance from the point as each other; the second actuator has a plurality of second partial actuators disposed at regular angular intervals with respect to the point in the optical interference region, the second partial actuators having the same shape as each other in the plan view and being disposed at the same distance from the point as each other; the first electrode includes: the second electrode includes: at least one of the first partial actuators is formed of a region where the first partial electrode and the third electrode overlap each other in the plan view; and at least one of the second partial actuators is formed of a region where the second partial electrode and the fourth electrode overlap each other in the plan view.