Optical unit
AssigneeNidec Corporation
InventorsTakayuki Iwase, Tomohiro Egawa, Keishi Otsubo
Life of this patent
Estimating the term…
Abstract
An optical unit includes an optical element, a holder, a first support portion, a second support portion, a first swing mechanism, and a second swing mechanism. The holder holds the optical element. The first support portion supports the holder so as to be swingable about a first swing axis. The second support portion supports the first support portion so as to be swingable about the second swing axis. The second swing mechanism includes a second magnet and a second coil. The second magnet is arranged on the first support portion. The second coil is arranged on the second support portion.
Claims13
An optical unit, comprising:
- an optical element that changes a traveling direction of light;
- a holder that holds the optical element;
- a first support portion that supports the holder so as to be swingable about a first swing axis;
- a second support portion that supports the first support portion so as to be swingable about a second swing axis intersecting the first swing axis;
- a first swing mechanism that swings the holder about the first swing axis with respect to the first support portion;
- a second swing mechanism that swings the first support portion about the second swing axis with respect to the second support portion;
- a first pre-load portion that is arranged on at least one of the holder and the first support portion and applies a pre-load in an axial direction of the first swing axis to at least a remaining one of the holder and the first support portion;
- and
- a second pre-load portion that is arranged on at least one of the first support portion and the second support portion and applies a pre-load in an axial direction of the second swing axis to at least a remaining one of the first support portion and the second support portion, wherein
- the first swing mechanism includes
- a first magnet arranged on the holder, and
- a first coil arranged on the second support portion, and
- the second swing mechanism includes
- a second magnet arranged on the first support portion, and
- a second coil arranged on the second support portion.
An optical unit, comprising:
- an optical element that changes a traveling direction of light;
- a holder that holds the optical element;
- a first support portion that supports the holder so as to be swingable about a first swing axis;
- a second support portion that supports the first support portion so as to be swingable about a second swing axis intersecting the first swing axis;
- a first swing mechanism that swings the holder about the first swing axis with respect to the first support portion;
- and
- a second swing mechanism that swings the first support portion about the second swing axis with respect to the second support portion, wherein
- the first swing mechanism includes
- a first magnet arranged on the holder, and
- a first coil arranged on the second support portion, the second swing mechanism includes
- a second magnet arranged on the first support portion, and
- a second coil arranged on the second support portion,
- one of the first support portion and the second support portion has at least three axial center protrusions protruding toward a remaining one of the first support portion and the second support portion,
- the at least three axial center protrusions are arranged on an identical circumference centered on the second swing axis,
- the remaining one of the first support portion and the second support portion has an axial center recess that is recessed in a direction opposite to an axial center protrusion of the at least three axial center protrusions and forms a part of a circle centered on the second swing axis, and
- the axial center recess is in contact with the axial center protrusion.
Dependencies are inferred from the claim text.