Beam scanner
First Claim
1. A beam scanner, comprising:
- a light-emitting element;
a lens disposed forwardly of said light emitting element;
a rocking reflective mirror disposed forwardly of said lens;
a displacement mechanism for said mirror comprising a dielectric electrode base, a plurality of electrode pairs with one electrode of each electrode pair being located on said dielectric electrode base and the other electrode of each electrode pair being located on the rocking reflective mirror such that each electrode of an electrode pair faces another electrode of the same electrode pair, and a plurality of torsion bars flexibly fixing said mirror in position relative to said dielectric electrode base; and
means for applying a voltage to selected ones of said electrode pairs to produce static fields across said selected ones of said electrode pairs and a displacement of said mirror.
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Accused Products
Abstract
The invention provides a beam scanner comprising a light-emitting element, a lens disposed forwardly of the light-emitting element in such a manner that its optical axis is parallel to the optical axis of the light-emitting element, and a rocking reflective mirror which is rotated by Coulomb force acting between static electrodes. There also is provided a beam scanner comprising a light-emitting element, a lens disposed forwardly of the light-emitting element in such a manner that its optical axis is parallel to the optical axis of the light-emitting element, and a displacement mechanism for reciprocal displacement of either the light-emitting element or the lens in a direction generally perpendicular to the optical axis thereof. The beam scanner of the invention is compact and permits reciprocal scanning.
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Citations
8 Claims
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1. A beam scanner, comprising:
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a light-emitting element; a lens disposed forwardly of said light emitting element; a rocking reflective mirror disposed forwardly of said lens; a displacement mechanism for said mirror comprising a dielectric electrode base, a plurality of electrode pairs with one electrode of each electrode pair being located on said dielectric electrode base and the other electrode of each electrode pair being located on the rocking reflective mirror such that each electrode of an electrode pair faces another electrode of the same electrode pair, and a plurality of torsion bars flexibly fixing said mirror in position relative to said dielectric electrode base; and means for applying a voltage to selected ones of said electrode pairs to produce static fields across said selected ones of said electrode pairs and a displacement of said mirror. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification