Sizing the field of view of a detector to improve operation of a lidar system
First Claim
1. A lidar system comprising:
- a light source configured to emit pulses of light along a light-source field of view (FOV);
a scanner configured to scan the light-source FOV across a field of regard (FOR) of the lidar system and direct the pulses of light along a scan direction, wherein each of the pulses illuminates a respective instantaneous light-source FOV which corresponds to the light-source FOV at a time when the pulse is emitted; and
a receiver configured to detect the pulses of light scattered by one or more targets, the receiver including a detector with a detector FOV that corresponds to an angular region over which the detector is configured to receive scattered light, wherein;
the light-source FOV is smaller than the detector FOV,the system is configured to detect the one or more targets, wherein the one or more targets are located up to RMAX meters away, andthe scanner causes the detector FOV to move relative to the instantaneous light-source FOV along the scan direction, so that (i) when a pulse of light is emitted, the instantaneous light-source FOV is approximately centered within the detector FOV, and (ii) when a scattered pulse of light returns from a first target of the one or more targets, the first target located RMAX meters away, the instantaneous light-source FOV is located near an edge of the detector FOV.
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Accused Products
Abstract
A lidar system includes a light source, a scanner, and a receiver and is configured to detect remote targets located up to RMAX meters away. The receiver includes a detector with a field of view larger than the light-source field of view. The scanner causes the detector field of view to move relative to the instantaneous light-source field of view along the scan direction, so that (i) when a pulse of light is emitted, the instantaneous light-source field of view is approximately centered within the detector field of view, and (ii) when a scattered pulse of light returns from a target located RMAX meters away, the instantaneous light-source field of view is located near an edge of the field of view of the detector and is contained within the field of view of the detector.
130 Citations
17 Claims
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1. A lidar system comprising:
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a light source configured to emit pulses of light along a light-source field of view (FOV); a scanner configured to scan the light-source FOV across a field of regard (FOR) of the lidar system and direct the pulses of light along a scan direction, wherein each of the pulses illuminates a respective instantaneous light-source FOV which corresponds to the light-source FOV at a time when the pulse is emitted; and a receiver configured to detect the pulses of light scattered by one or more targets, the receiver including a detector with a detector FOV that corresponds to an angular region over which the detector is configured to receive scattered light, wherein; the light-source FOV is smaller than the detector FOV, the system is configured to detect the one or more targets, wherein the one or more targets are located up to RMAX meters away, and the scanner causes the detector FOV to move relative to the instantaneous light-source FOV along the scan direction, so that (i) when a pulse of light is emitted, the instantaneous light-source FOV is approximately centered within the detector FOV, and (ii) when a scattered pulse of light returns from a first target of the one or more targets, the first target located RMAX meters away, the instantaneous light-source FOV is located near an edge of the detector FOV. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method in a lidar system for scanning a field of regard of the lidar system configured to detect one or more targets located up to Ruff meters away, the method comprising:
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generating a light pulse for each of a plurality of different scanning positions of a scanner along a scan direction, wherein each of the generated pulses illuminates a respective instantaneous light-source field of view (FOV) which corresponds to a light-source FOV at a time when the pulse is emitted; and receiving scattered light pulses scattered from the one or more targets in at least some of the plurality of different scanning positions, using a detector with a detector FOV that corresponds to an angular region over which the detector is configured to receive scattered light, wherein the light-source FOV is smaller than the detector FOV, including causing the detector FOV to move relative to the instantaneous light-source FOV along the scan direction, so that (i) when a pulse of light is emitted, the instantaneous light-source FOV is approximately centered within the detector FOV, and (ii) when a scattered pulse of light returns from a first target of the one or more targets, the first target located RMAX meters away, the instantaneous light-source FOV is located near an edge of the detector FOV. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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Specification