Device and method for deflecting a light beam in order to scan a solid angle range
AssigneeRobert Bosch GmbH
InventorsJohannes Artzner, Manuel Glueck
Life of this patent
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Abstract
A device and a method for deflecting a light beam to scan a solid angle range. The device includes: a deflection device having an adjustable micromirror, which is configured to periodically deflect a light beam in accordance with an actuating signal, in order to periodically scan a solid angle range, using the micromirror; a control device to receive a control signal that indicates a currently preferred solid angle in the solid angle range to be scanned, and to generate the actuating signal based on the received control signal; and the control device is configured to generate the actuating signal so that a maximum of a location probability density of the periodically deflected light beam is situated at the solid angle.
Claims11
A device for deflecting a light beam to scan a solid angle range, comprising:
- a deflection device, having an adjustable micromirror, to periodically deflect a light beam in accordance with an actuating signal, to periodically scan a solid angle range, using the micromirror;
- and
- a control device to receive a control signal that indicates a currently selected solid angle in the solid angle range to be scanned, and to generate the actuating signal based on the received control signal;
- and
- wherein the control device is configured to generate the actuating signal so that a maximum of a location probability density of the periodically deflected light beam is situated at the selected solid angle by varying, during at least one period of the periodic scan, an angular velocity of the micromirror;
- wherein the control device generates, for the at least one period, the actuating signal in such a manner that, based on the actuating signal, a first angular velocity of the micromirror while scanning within the selected solid angle is different than a second angular velocity of the micromirror while scanning within the solid angle range outside the selected solid angle, the first angular velocity being slower than the second angular velocity;
- wherein the location probability density is a function which indicates a probability of the light beam per differential solid angle so that integration of the location probability density over the entirety of the solid angle range yields one.
A method for deflecting a light beam to scan a solid angle range, the method comprising:
- periodically deflecting, by a micromirror, a light beam in accordance with an actuating signal to periodically scan a solid angle range;
- receiving a control signal, which indicates a currently selected solid angle in the solid angle range to be scanned;
- and
- generating the actuating signal based on the received control signal so that a maximum of a location probability density of the deflected light beam is situated at the selected solid angle by varying, during a least one period of the periodic scan, an angular velocity of the micromirror during the scanning of the solid angle range;
- wherein the generating includes generating, for the at least one period, the actuating signal in such a manner that, based on the actuating signal, a first angular velocity of the micromirror while scanning within the selected solid angle is different than a second angular velocity of the micromirror while scanning within the solid angle range outside the selected solid angle, the first angular velocity being slower than the second angular velocity;
- wherein the location probability density is a function which indicates a probability of the light beam per differential solid angle so that integration of the location probability density over the entirety of the solid angle range yields one.
Dependencies are inferred from the claim text.