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US 12,681,291 B2Granted
Laser scanning system
AssigneeThe Australian National University
InventorsYongxiao Li, Woei Ming Lee, Yean Jin Lim
Life of this patent
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Abstract
A method of scanning a laser over a field of view, the method comprising: providing a laser to produce the laser beam; rasterizing the laser beam over a first sub-area of the field of view; deflecting the laser beam to a second sub-area of the field of view; and rasterizing the laser beam over the second sub-area of the field of view; and capturing image information produced by the laser beam so that, for each sub-area of the field of view, the rasterized laser beam defines a plurality of image segments; for each segment calculating an image correction and applying a correction to the laser according to the calculated image correction for the segment, and corresponding system.
Claims20
A method of scanning a laser over a field of view, the method comprising:
- providing a laser to produce a laser beam;
- rasterizing the laser beam over a first sub-area of the field of view;
- deflecting the laser beam to a second sub-area of the field of view;
- rasterizing the laser beam over the second sub-area of the field of view;
- capturing image information produced by the laser beam so that, for each sub-area of the field of view, the rasterized laser beam defines a plurality of image segments, wherein each of the first sub-area and the second sub-area comprises a number of rows of the image information, and wherein each of the image segments comprises a plurality of said rows;
- for each image segment, calculating an image correction and applying a correction to the laser according to the calculated image correction for the image segment;
- and
- applying a time stamp to each correction and/or each image segment and providing a time correlation between the image segments and the corrections to provide a time multiplexed approach to corrections.
5 more elements
A system for scanning a laser beam over a field of view, the system comprising:
- a laser for producing the laser beam;
- a first moveable deflector for rasterizing the laser beam over a first sub-area of the field of view;
- a second moveable deflector for deflecting the laser beam so that the first moveable deflector rasterizes a second sub-area of the field of view;
- an image digitizer for digitizing image information produced by the laser beam interacting with a target;
- a computer processor for capturing image information produced by the image digitizer so that, for each sub-area of the field of view, the rasterized laser beam defines a plurality of image segments, wherein each of the first sub-area and the second sub-area comprises a number of rows of the image information, and wherein each of the image segments comprises a plurality of said rows, wherein the computer processor calculates an image correction for each image segment;
- and
- an optical correction element for applying a correction to the laser beam according to the calculated image corrections, wherein the system is adapted to:
- apply a time stamp to each correction and/or each image segment;
- and
- provide a time correlation between the image segments and the corrections to provide a time multiplexed approach to corrections.
7 more elements
A method of scanning a laser beam over a field of view, comprising the steps of:
- sequentially raster scanning the laser beam within a plurality of sub-areas of the field of view, wherein the sub-areas are arranged in a first direction of the field of view;
- for each sub-area, defining a plurality of image segments, wherein the image segments of a particular sub-area are arranged in a second direction of the field of view perpendicular to the first direction;
- capturing image information for each image segment, the image information associated with illumination of the field of view by the laser beam, wherein each of a first sub-area and a second sub-area comprises a number of rows of the image information, and wherein each of the image segments comprises a plurality of said rows;
- calculating, for each image segment, an image correction, wherein the image correction is configured to enable a correction to the laser beam when the laser beam is subsequently raster scanned over the corresponding image segment;
- applying a time stamp to each correction and/or each image segment;
- and
- providing a time correlation between the image segments and the corrections to provide a time multiplexed approach to corrections.
4 more elements
A system for scanning a laser beam over a field of view, the system comprising:
- a laser for producing the laser beam;
- a first movable deflector for raster scanning the laser beam;
- a second movable deflector for deflecting the laser beam to sequentially raster scan a plurality of sub-areas of the field of view, wherein the sub-areas are arranged in a first direction of the field of view;
- an image capture means configured to capture image information for each image segment, the image information associated with illumination of the field of view by the laser beam, wherein each of a first sub-area and a second sub-area comprises a number of rows of the image information, and wherein each of the image segments comprises a plurality of said rows;
- and
- a processor configured to:
- for each sub-area, define a plurality of image segments, wherein the image segments of a particular sub-area are arranged in a second direction of the field of view perpendicular to the first direction;
- capture image information for each image segment, the image information associated with illumination of the field of view by the laser beam;
- calculate, for each image segment, an image correction, wherein the image correction is configured to enable a correction to the laser beam when the laser beam is subsequently raster scanned over the corresponding image segment;
- apply a time stamp to each correction and/or each image segment;
- and
- calculate a time correlation between the image segments and the corrections to provide a time multiplexed approach to corrections.
9 more elements
Dependencies are inferred from the claim text.