Mirror unit, distance measurement device and laser radar, and mobile body and fixed object having the mirror unit and the distance measurement device or the laser radar
First Claim
1. A mirror unit comprising a plurality of pairs of first reflecting surfaces and second reflecting surfaces, being inclined relative to a rotation axis, and extending in directions crossing each other, the mirror unit rotating about the rotation axis, wherein a beam emitted from a light source is reflected on a first reflecting surface of the mirror unit, and then reflected on a second reflecting surface paired with the first reflecting surface, and the beam is emitted while being scanned over an object according to the rotation of the mirror unit, whereinthe mirror unit includes at least a first reflecting member on which the first reflecting surfaces are formed, and a second reflecting member on which the second reflecting surfaces are formed,the first reflecting member and the second reflecting member are combined to select an emission angle of a beam emitted from the mirror unit, andcrossing angles of respective pairs of the first and second reflecting surfaces configured by combining the first and second reflecting members to select an emission angle are constant irrespective of rotation of the mirror.
1 Assignment
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Accused Products
Abstract
A mirror unit, a distance measurement device and a laser radar, and a mobile body and a fixed object having the mirror unit and the distance measurement device or the laser radar. The mirror unit includes a plurality of pairs of first reflecting surfaces and second reflecting surfaces inclined relative to a rotation axis, and extending in directions crossing each other. The mirror unit rotates about the rotation axis. In the mirror unit, a beam emitted from a light source is reflected on a first reflecting surface, and then reflected on a second reflecting surface paired with the first reflecting surface. The beam is scanned over an object with the rotation of the mirror unit. In the mirror unit, the first and second reflecting surfaces are formed, respectively, on first and second reflecting members which are combined to select an emission angle of a beam emitted from the mirror unit.
4 Citations
20 Claims
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1. A mirror unit comprising a plurality of pairs of first reflecting surfaces and second reflecting surfaces, being inclined relative to a rotation axis, and extending in directions crossing each other, the mirror unit rotating about the rotation axis, wherein a beam emitted from a light source is reflected on a first reflecting surface of the mirror unit, and then reflected on a second reflecting surface paired with the first reflecting surface, and the beam is emitted while being scanned over an object according to the rotation of the mirror unit, wherein
the mirror unit includes at least a first reflecting member on which the first reflecting surfaces are formed, and a second reflecting member on which the second reflecting surfaces are formed, the first reflecting member and the second reflecting member are combined to select an emission angle of a beam emitted from the mirror unit, and crossing angles of respective pairs of the first and second reflecting surfaces configured by combining the first and second reflecting members to select an emission angle are constant irrespective of rotation of the mirror.
Specification