Optical device, optical scanner, and image display device

摘要

An optical scanner includes: a movable portion that includes a base portion and a light reflecting plate which is fixed to the base portion and includes a light reflecting portion with a light reflecting property and is rotatable about the Y-axis; a frame portion that is provided so as to surround the base portion and is rotatable about the X-axis perpendicular to the Y-axis; a shaft portion that supports the movable portion so as to be rotatable about the Y-axis with respect to the frame portion; and a permanent magnet that is provided in the frame portion. The light reflecting plate is provided such that it is separated from the shaft portion in a thickness direction and overlaps the shaft portion, as viewed from the thickness direction. The permanent magnet is fixed to a surface of the frame portion close to the light reflecting plate.

主权项

1. An optical device comprising:
a movable portion that is rotatable about a first axis; a frame portion that is rotatable about a second axis intersecting the first axis; a first shaft portion that supports the movable portion so as to be rotatable about the first axis with respect to the frame portion; and a permanent magnet that is provided in the frame portion, wherein the movable portion includes a base portion and a light reflecting plate which is fixed to the base portion and includes a light reflecting portion with a light reflecting property, the frame portion is provided so as to surround the base portion, the first shaft portion includes one end connected to the base portion and the other end connected to the frame portion, the light reflecting plate is provided so as to be separated from the first shaft portion in a thickness direction, the permanent magnet is fixed to a surface of the frame portion close to the light reflecting plate, wherein the permanent magnet is on the same side of the frame portion as the light reflecting plate, the permanent magnet is arranged such that one magnetic pole and the other magnetic pole are opposite to each other with the second axis interposed therebetween, as viewed from the thickness direction of the frame portion, the permanent magnet has a longitudinal shape and is magnetized in a longitudinal direction, and one end of permanent magnet is arranged on the first axis, as viewed from the thickness direction of the frame portion.