Scanning device with emitting and receiving scanner prisms mounted on common rotating shaft
First Claim
1. An optical scanning apparatus for optically scanning a scene, comprising:
- an emitting arrangement including a first prism arranged and adapted to deflect a light beam on an emitted beam path emitted to the scene;
a receiving arrangement including a second prism arranged and adapted to deflect a reflection beam on a received beam path received from the scene as a reflected portion of said light beam that is reflected from the scene; and
a drive axle that is rotatably supported;
wherein said first prism and said second prism are both respectively rigidly connected in common to said drive axle, so that said drive axle, said first prism and said second prism are rotatable in common as a unit.
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Accused Products
Abstract
An optical scanning apparatus includes a radiation source that emits a radiation beam, a rotating first prism that deflects the emitted beam, a first lens that projects the deflected emitted beam onto a scene to be scanned, a second lens that receives a reflected beam arising as a reflection of the emitted beam from the scene and projects the reflected beam onto a rotating second prism, which deflects the reflected beam onto a photodetector. The first and second prisms are respectively rigidly mounted on or connected to a common rotatable drive axle, preferably on two opposite ends of the drive axle, which is preferably a rotor shaft of a drive motor. Thereby, the rotation of the two deflection prisms is positively and precisely synchronized, and the overall apparatus is compact, simple and robust. This apparatus is suitable for use in an optical distance radar system for a motor vehicle.
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Citations
24 Claims
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1. An optical scanning apparatus for optically scanning a scene, comprising:
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an emitting arrangement including a first prism arranged and adapted to deflect a light beam on an emitted beam path emitted to the scene;
a receiving arrangement including a second prism arranged and adapted to deflect a reflection beam on a received beam path received from the scene as a reflected portion of said light beam that is reflected from the scene; and
a drive axle that is rotatably supported;
wherein said first prism and said second prism are both respectively rigidly connected in common to said drive axle, so that said drive axle, said first prism and said second prism are rotatable in common as a unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. An optical scanning apparatus for optically scanning a scene, comprising:
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a radiation source adapted to emit a light beam;
a first prism arranged to receive and deflect the light beam to the scene;
a second prism arranged to receive and deflect a reflection beam formed as a portion of the light beam reflected from the scene;
a photodetector arranged to receive the reflection beam that is deflected by said second prism; and
a drive motor comprising a stator, a rotatable rotor, and a rotatable drive shaft connected rigidly to said rotor;
wherein said first and second prisms are both connected rigidly to said drive shaft along a single rotation axis common to both of said first and second prisms. - View Dependent Claims (24)
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Specification