IMAGE SCANNING APPARATUS AND METHOD
First Claim
Patent Images
1. An image scanning apparatus comprising:
- a time delay integration sensor for obtaining first image information from a target; and
a scan device for causing relative motion between the time delay integration sensor and the target to enable an image of the target to be generated from a scan of the target; and
a processor;
the image scanning apparatus characterized by;
a detector array for obtaining second image information from a target;
wherein the first image information corresponds to a first portion of light received from the target and the second image information corresponds to a second portion of light received from the target, the first and second portions being separated in at least one of the following ways;
spatially, chromatically or temporally; and
wherein the processor is adapted to use said second information to calculate a focus position for obtaining the first image information.
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Abstract
An image scanning apparatus comprises a time delay integration sensor for obtaining first image information from a target and a scan device for causing relative motion between the time delay integration sensor and the target. The image scanning apparatus is characterized by detector array for obtaining second image information from a target, wherein the first image information corresponds to a first portion of light received from the target and the second image information corresponds to a second portion of light received from the target.
29 Citations
26 Claims
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1. An image scanning apparatus comprising:
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a time delay integration sensor for obtaining first image information from a target; and a scan device for causing relative motion between the time delay integration sensor and the target to enable an image of the target to be generated from a scan of the target; and
a processor;the image scanning apparatus characterized by; a detector array for obtaining second image information from a target; wherein the first image information corresponds to a first portion of light received from the target and the second image information corresponds to a second portion of light received from the target, the first and second portions being separated in at least one of the following ways;
spatially, chromatically or temporally; andwherein the processor is adapted to use said second information to calculate a focus position for obtaining the first image information. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 21, 23, 24)
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16. A method of focusing an image scanning apparatus comprising:
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capturing first image information of a target using a time delay integration sensor, the first image information corresponding to a first portion of light received from the target that is used to generate an image of the target; capturing second image information of the target using a detector array, the second image information corresponding to a second portion of light received from the target; calculating a focus position for use in capturing the first image information using the second image information; and adjusting the focus of the image scanning apparatus according to the calculated focus position; generating relative motion between the time delay integration sensor and the target before capturing further first image information at the calculated focus position, the further first image information corresponding to light received from a further part of the target. - View Dependent Claims (17, 18, 19, 20, 22, 25, 26)
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Specification