Abstract: There is provided an optical scanner including: a mirror having a reflection surface for reflecting light, and a first back surface positioned at a side opposite to the reflection surface; a permanent magnet disposed at the first back surface of the mirror; a support portion that supports the mirror and has a second back surface positioned at the same side as the first back surface; a shaft portion that couples the mirror and the support portion to each other and enables the mirror to swing around a swing axis; a first member disposed at the second back surface of the support portion; a second member that supports the first member in a cantilever manner in a direction orthogonal to the swing axis and along the second back surface; a third member disposed to face the first member via the second member and coupled to the second member; and an electromagnetic coil disposed between the first member and the third member.

Abstract: A motor includes an annularly-shaped field system having a first main pole magnetized in a first direction along a rotation axis and a second main pole magnetized in a second direction opposite to the first direction, and including a plurality of magnetic poles arrayed along a circumference around the rotation axis, and an armature facing the field system in a direction along the rotation axis, wherein a value of a ratio of an inner diameter to an outer diameter of the field system is within a range from 0.4 to 0.8.

Abstract: An optical scanner includes a movable portion having a movable plate on which a light reflecting portion is provided, a frame body portion provided surrounding the movable portion when viewed in a planar manner, a first axis portion that oscillatably supports the movable portion around a first oscillation axis, a second axis portion that oscillatably supports the frame body portion around a second oscillation axis, which intersects the first oscillation axis, and a permanent magnet provided in the frame body portion, in which the movable portion has a projection portion, which is disposed overlapping the first oscillation axis within a region that does not overlap with the permanent magnet when viewed in a planar manner, and which projects, from the movable plate, further to the permanent magnet side than the first axis portion.

Abstract: There is provided an optical scanner including: a mirror having a reflection surface for reflecting light, and a first back surface positioned at a side opposite to the reflection surface; a permanent magnet disposed at the first back surface of the mirror; a support portion that supports the mirror and has a second back surface positioned at the same side as the first back surface; a shaft portion that couples the mirror and the support portion to each other and enables the mirror to swing around a swing axis; a first member disposed at the second back surface of the support portion; a second member that supports the first member in a cantilever manner in a direction orthogonal to the swing axis and along the second back surface; a third member disposed to face the first member via the second member and coupled to the second member; and an electromagnetic coil disposed between the first member and the third member.

Abstract: An optical device unit that can operate very quietly and an image display apparatus having the optical device unit are provided. An optical device unit includes an optical device and a coupler joined to the optical device. The optical device includes an optical portion that is shaped as a plate and has a light incident surface on which light is incident, a movable portion that supports the optical portion, pivot portions that support the movable portion, and a support portion that supports the pivot portions. The support portion includes connection portions to which the pivot portions are connected and the connection portions are located away from the coupler.

Abstract: An optical device includes: an optical portion that has a light incident surface on which light is incident; a movable portion that supports the optical portion; a shaft portion that supports the movable portion so that the movable portion is oscillatable; and a fixing portion that is connected to the shaft portion, wherein the fixing portion has a thickness greater than the shaft portion and includes a portion of which an end not connected to the shaft portion serves as a free end.

Abstract: An optical device unit that can operate very quietly and an image display apparatus having the optical device unit are provided. An optical device unit includes an optical device and a coupler joined to the optical device. The optical device includes an optical portion that is shaped as a plate and has a light incident surface on which light is incident, a movable portion that supports the optical portion, pivot portions that support the movable portion, and a support portion that supports the pivot portions. The support portion includes connection portions to which the pivot portions are connected and the connection portions are located away from the coupler.

Abstract: Provided is an optical scanner including a movable portion having a movable plate on which a light reflecting portion is provided, a frame body portion provided surrounding the movable portion when viewed in a planar manner, a first axis portion that oscillatably supports the movable portion around a first oscillation axis, a second axis portion that oscillatably supports the frame body portion around a second oscillation axis, which intersects the first oscillation axis, and a permanent magnet provided in the frame body portion, in which the movable portion has a projection portion, which is disposed overlapping the first oscillation axis within a region that does not overlap with the permanent magnet when viewed in a planar manner, and which projects, from the movable plate, further to the permanent magnet side than the first axis portion.

Abstract: An optical device includes: an optical portion that has a light incident surface on which light is incident; a movable portion that includes a disposition surface on which the optical portion is disposed and a concave disposition portion; and a shaft portion that supports the movable portion so that the movable portion is oscillatable, wherein a portion in which the disposition surface is not formed is included between the optical portion and the shaft portion in a plan view in a normal line direction of the light incident surface.

Abstract: An optical scanner includes: a movable plate which includes a light reflection unit; a first torsion bar spring which oscillatably supports the movable plate around a first axis; a displacement portion which is connected to the first torsion bar spring; a second torsion bar spring which oscillatably supports the displacement portion around a second axis intersecting with the first axis; a permanent magnet which is provided on the displacement portion to be inclined with respect to the first axis and the second axis; and a coil which is provided to be separated from the displacement portion and generates a magnetic field acting on the permanent magnet. The displacement portion includes a frame surrounding the movable plate, and a damper which has a smaller thickness than that of the frame and extends in a direction intersecting with a direction in which the second torsion bar spring extends from the frame.

Abstract: An optical scanner includes: a movable plate which includes a light reflection unit which reflects light; a first torsion bar spring which oscillatably supports the movable plate around a first axis; a displacement member which is connected to the first torsion bar spring; a second torsion bar spring which oscillatably supports the displacement member around a second axis intersecting with the first axis; a coil provided on the displacement member; and a magnet which is provided spaced apart from the displacement member, and generates a magnetic field to be inclined with respect to the first axis and the second axis and to act on the coil, wherein the displacement member includes a frame surrounding the movable plate, and a damper which has a smaller thickness than that of the frame and extends in a direction intersecting with a direction in which the second torsion bar spring extends from the frame.

Abstract: An optical scanner includes: a movable plate which includes a light reflection unit; a first torsion bar which oscillatably supports the movable plate around a first axis; a first displacement member which is connected to the first torsion bar; a second torsion bar which oscillatably supports the first displacement member around a second axis; a second displacement member which is connected to the second torsion bar; and an actuator which is installed on the second displacement member and applies a displacement to the second displacement member so as to apply torsional deformation and bending deformation to the second torsion bar, in which the first displacement member includes a frame member surrounding the movable plate, and a damper which has a smaller thickness than that of the frame member and extends in a direction intersecting with a direction in which the second torsion bar extends from the frame member.

Abstract: An optical device includes: an optical portion that has a light incident surface on which light is incident; a movable portion that supports the optical portion; a shaft portion that supports the movable portion so that the movable portion is oscillatable; and a fixing portion that is connected to the shaft portion, wherein the fixing portion has a thickness greater than the shaft portion and includes a portion of which an end not connected to the shaft portion serves as a free end.

Abstract: An optical device includes: an optical portion that has a light incident surface on which light is incident; a movable portion that includes a disposition surface on which the optical portion is disposed and a concave disposition portion; and a shaft portion that supports the movable portion so that the movable portion is oscillatable, wherein a portion in which the disposition surface is not formed is included between the optical portion and the shaft portion in a plan view in a normal line direction of the light incident surface.

Abstract: An optical scanner manufacturing method includes overlapping a first substrate including a base portion region that becomes a base portion, a shaft portion region that becomes a shaft portion, and a support portion region that becomes a support portion, and a second substrate in which a frame-like concave portion, a first portion that is positioned inside the concave portion, and a frame-like second portion that is positioned outside the concave portion and has a light reflectance reduction function are formed on one surface, to bond the base portion region to the first portion and to bond the support portion region to the second portion, patterning the first substrate to form the base portion, the shaft portion, and the support portion, and cutting the second substrate from the other surface side to separate the first portion and the second portion from each other.

Abstract: An optical scanner includes: a movable plate which includes a light reflection unit; a first torsion bar spring which oscillatably supports the movable plate around a first axis; a displacement portion which is connected to the first torsion bar spring; a second torsion bar spring which oscillatably supports the displacement portion around a second axis intersecting with the first axis; a permanent magnet which is provided on the displacement portion to be inclined with respect to the first axis and the second axis; and a coil which is provided to be separated from the displacement portion and generates a magnetic field acting on the permanent magnet. The displacement portion includes a frame surrounding the movable plate, and a damper which has a smaller thickness than that of the frame and extends in a direction intersecting with a direction in which the second torsion bar spring extends from the frame.

Abstract: An optical scanner includes: a movable plate which includes a light reflection unit which reflects light; a first torsion bar spring which oscillatably supports the movable plate around a first axis; a displacement member which is connected to the first torsion bar spring; a second torsion bar spring which oscillatably supports the displacement member around a second axis intersecting with the first axis; a coil provided on the displacement member; and a magnet which is provided spaced apart from the displacement member, and generates a magnetic field to be inclined with respect to the first axis and the second axis and to act on the coil, wherein the displacement member includes a frame surrounding the movable plate, and a damper which has a smaller thickness than that of the frame and extends in a direction intersecting with a direction in which the second torsion bar spring extends from the frame.

Abstract: An optical scanner includes: a movable plate which includes a light reflection unit; a first torsion bar which oscillatably supports the movable plate around a first axis; a first displacement member which is connected to the first torsion bar; a second torsion bar which oscillatably supports the first displacement member around a second axis; a second displacement member which is connected to the second torsion bar; and an actuator which is installed on the second displacement member and applies a displacement to the second displacement member so as to apply torsional deformation and bending deformation to the second torsion bar, in which the first displacement member includes a frame member surrounding the movable plate, and a damper which has a smaller thickness than that of the frame member and extends in a direction intersecting with a direction in which the second torsion bar extends from the frame member.

Abstract: An optical scanner manufacturing method includes overlapping a first substrate including a base portion region that becomes a base portion, a shaft portion region that becomes a shaft portion, and a support portion region that becomes a support portion, and a second substrate in which a frame-like concave portion, a first portion that is positioned inside the concave portion, and a frame-like second portion that is positioned outside the concave portion and has a light reflectance reduction function are formed on one surface, to bond the base portion region to the first portion and to bond the support portion region to the second portion, patterning the first substrate to form the base portion, the shaft portion, and the support portion, and cutting the second substrate from the other surface side to separate the first portion and the second portion from each other.