OPTICAL PATH CHANGING DEVICE AND PROJECTION IMAGE DISPLAY APPARATUS

摘要

The optical path changing device of the present disclosure includes an optical member having a parallel plate face for changing an optical path, and first, second, and third actuators. The first, the second, and the third actuators are connected with the optical member at first, second, and third vertices of a triangle imaginarily drawn on a plane parallel to the parallel plate face of the optical member. The first, the second, and the third actuators drive the optical member forward and backward in a normal direction of the parallel plate face at the first, the second, and the third vertices serving as points of load. The optical member has a center of gravity within the triangle when seen from the normal direction.

主权项

1. An optical path changing device comprising:
an optical member having a parallel plate face for changing an optical path; and first actuator, second actuator, and third actuator respectively connected with the optical member at first vertex, second vertex, and third vertex of a triangle imaginarily drawn on a plane parallel to the parallel plate face of the optical member, and respectively driving the optical member forward and backward in a normal direction of the parallel plate face at the first vertex, the second vertex, and the third vertex serving as points of load, wherein the optical member has a center of gravity within the triangle when seen from the normal direction.