Patent ID: 7525713

Claim:
An optical device comprising: a fixed portion comprised of a substrate, the substrate having a first recess having a bottom and a second recess formed in the bottom of the first recess, and the second recess having a bottom, wherein the fixed portion further includes a first light reflection portion formed on the bottom of the second recess and detection electrodes formed on the bottom of the second recess so as to surround the first light reflection portion; a movable portion having a first surface that faces the fixed portion and a second surface opposite to the first surface, the movable portion having a second light reflection portion formed on the first surface of the movable portion, the second light reflection portion facing the first light reflection portion with a first gap being formed between the first light reflection portion and the second light reflection portion, the movable portion being movable with respect to the fixed portion so as to change the first gap between the first light reflection portion and the second light reflection portion, the first light reflection portion and the second light reflection portion being configured to reflect light that enters into the optical device repeatedly between the first light reflection portion and the second light reflection portion so as to cause interference and emit light having a wavelength corresponding to a size of the first gap to exit outside of the optical device; a first drive electrode portion facing the second light reflection portion near the first light reflection portion with a second gap being formed between the second light reflection portion and the first drive electrode portion, wherein in the first drive electrode portion is disposed on the bottom of the first recess; a second drive electrode portion facing the second surface of the movable portion with a third gap being formed between the second surface of the movable portion and the second drive electrode portion; and a circuit operable to generate a potential difference between the first drive electrode portion, the second drive electrode portion, and the movable portion so as to generate an electrostatic attraction force therebetween for changing a position and/or a posture of the movable portion.