Patent ID: 8279508

Claim:
An optical reflecting element comprising: a frame-shaped support body; a first low-frequency vibrator whose first end is connected to an inside of the support body; a second low-frequency vibrator whose first end is connected to an inside of the support body; a frame of which outside is connected to second ends of the first and second low-frequency vibrators, the frame disposed between the first and second low-frequency vibrators; a first high-frequency vibrator whose first end is connected to an inside of the frame; a second high-frequency vibrator whose first end is connected to an inside of the frame; and a mirror connected to second ends of the first and second high-frequency vibrators, the mirror disposed between the first and second high-frequency vibrators, wherein each of the first and second high-frequency vibrators includes: a first drive unit for rotating the mirror around a first central axis of the first and second high-frequency vibrators; and a first monitor element for measuring a rotation amount of the mirror, wherein the first drive unit includes: a substrate; a bottom electrode layer provided on the substrate; a piezoelectric layer provided on the bottom electrode layer; and a drive electrode provided on the piezoelectric layer, wherein the first monitor element includes: the substrate shared with the first drive unit; the bottom electrode layer shared with the first drive unit; the piezoelectric layer shared with the first drive unit; and a first monitor electrode provided on the piezoelectric layer, wherein each of the first and second low-frequency vibrators includes a second drive unit for rotating the frame and the mirror around a second central axis perpendicular to the first central axis, wherein the second drive unit includes: the substrate shared with the first drive unit; the bottom electrode layer shared with the first drive unit; the piezoelectric layer shared with the first drive unit; and the drive electrode shared with the first drive unit, wherein the first low-frequency vibrator further includes: the first monitor electrode shared with the first and second high-frequency vibrators; and an insulator layer provided between the first monitor electrode and the piezoelectric layer, the insulator layer being a dead zone for preventing a piezoelectric effect due to the piezoelectric layer from reaching the first monitor electrode, wherein the second low-frequency vibrator further includes a second monitor element for measuring a rotation amount of the frame and the mirror, and wherein the first monitor electrode provided on the first low-frequency vibrator extends from a top of the first low-frequency vibrator to the support body and is connected to an extraction electrode provided on the support body.