Movable device, range-finding apparatus, image display apparatus, head-mounted display, wavelength-variable laser unit, and spectroscopic sensor
A movable device includes: a movable portion; a driving section configured to generate a driving force to move the movable portion; a movement mechanical section; and at least one convex portion. The movement mechanical section includes: a contact portion contacting the movable portion, the contact portion movable in a movement direction by the driving force of the driving section; and multiple concave-convex portions movable with the contact portion in the movement direction. At least one convex portion engaging with corresponding one of the multiple concave-convex portions, said at least one convex portion being static relative to the movement mechanical section in the movement direction.
1 . A movable device comprising:
a movable portion, and a torsion bar that supports the movable portion;
a driving section configured to generate a driving force to move the movable portion;
a movement mechanical section including:
a contact portion contacting the movable portion, the contact portion movable in a movement direction by the driving force of the driving section, wherein the contact portion moves in response to a drive of the driving section and tilts the movable portion about a rotation axis; and
multiple concave-convex portions movable with the contact portion in the movement direction,
at least one convex portion engaging with corresponding one of the multiple concave-convex portions, said at least one convex portion being static relative to the movement mechanical section in the movement direction,
wherein a torsional stiffness of the torsion bar about the rotation axis is smaller than a stiffness of the at least one convex portion in a direction in which the at least one convex portion faces the multiple concave-convex portions.
2 . The movable device according to claim 1 ,
wherein the corresponding one of the multiple concave-convex portions changes according to a movement of the multiple concave-convex portions.
3 . The movable device according to claim 1 ,
wherein the driving section includes multiple piezoelectric elements on a surface facing the movement mechanical section.
4 . The movable device according to claim 1 ,
wherein the contact portion moves in one rotational direction, a bidirectional rotational direction, or a linear direction.
5 . The movable device according to claim 1 , further comprising:
another driving section configured to generate a driving force to move the driving section, the movable portion, and the movement mechanical section in a scanning direction,
wherein the movable portion includes a reflector configured to deflect light in the scanning direction.
6 . The movable device according to claim 1 , further comprising a reflector.
7 . A range-finding apparatus comprising:
the movable device according to claim 6 .
8 . An image display apparatus comprising:
the movable device according to claim 6 .
9 . A head-mounted display comprising:
the movable device according to claim 6 .
10 . A movable device comprising:
a movable portion, and a torsion bar that supports the movable portion;
a driving section configured to generate a driving force to move the movable portion;
a movement mechanical section including:
a contact portion contacting the movable portion, the contact portion movable in a movement direction by the driving force of the driving section, wherein the contact portion moves in response to a drive of the driving section and tilts the movable portion about a rotation axis; and
multiple concave-convex portions movable with the contact portion,
at least one concave portion engaging with corresponding one of the multiple concave-convex portions, at least one convex portion being static relative to the movement mechanical section in the movement direction,
wherein a torsional stiffness of the torsion bar about the rotation axis is smaller than a stiffness of the at least one convex portion in a direction in which the at least one convex portion faces the multiple concave-convex portions.