Compensation for optical distortion at imaging plane
First Claim
Patent Images
1. An imaging device, comprising:
- imaging optics to receive radiation from an object and to project an image of the object to an image plane, wherein said imaging optics produces a distortion having a distortion profile at least in a portion of said image; and
a semiconductor sensor array located adjacent or at said image plane to receive said image and having a plurality of sensing pixels arranged relative to one another to substantially reduce a spatial component of the distortion profile produced by said imaging optics, to produce pixel signals indicative of said image of the object with a reduced distortion;
wherein each sensing pixel has a photosensitive area whose size depends on an intensity component of said distortion profile, to correct a distortion in an intensity distribution across said sensor array.
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Abstract
An imaging system having an imaging optics and a semiconductor sensor array which has a spatial distribution of sensing pixels to substantially match a distortion profile produced by the imaging optics.
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Citations
27 Claims
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1. An imaging device, comprising:
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imaging optics to receive radiation from an object and to project an image of the object to an image plane, wherein said imaging optics produces a distortion having a distortion profile at least in a portion of said image; and
a semiconductor sensor array located adjacent or at said image plane to receive said image and having a plurality of sensing pixels arranged relative to one another to substantially reduce a spatial component of the distortion profile produced by said imaging optics, to produce pixel signals indicative of said image of the object with a reduced distortion;
wherein each sensing pixel has a photosensitive area whose size depends on an intensity component of said distortion profile, to correct a distortion in an intensity distribution across said sensor array. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An imaging device, comprising:
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imaging optics to receive radiation from an object and to project an image of the object to an image plane, wherein said imaging optics produces a distortion having a distortion profile at least in a portion of said image; and
a semiconductor sensor array located adjacent or at said image plane to receive said image and having a plurality of sensing pixels arranged relative to one another to substantially reduce a spatial component of the distortion profile produced by said imaging optics, to produce pixel signals indicative of said image of the object with a reduced distortion;
wherein said sensing pixels each have photosensitive areas that are substantially identical to one another, and further comprising a processing circuit operable to modify said pixel signals to correct an intensity component of the distortion profile. - View Dependent Claims (8)
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9. A method for correcting optical distortion in an imaging system, comprising:
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determining a distortion profile of imaging optics at a plane, said distortion profile having a spatial component and an intensity component;
forming a sensor array of sensing pixels by arranging the sensing pixels in curved rows and columns based on the spatial component of the distortion profile; and
placing the sensor array adjacent or at the plane to convert an image produced by the imaging optics into pixel signals that represent an electronic version of the image with a reduced amount of distortion;
wherein said sensing pixels each have photosensitive areas that are substantially identical to one another, and further comprising modifying the pixel signals to correct for the intensity component of the distortion profile of said sensor array. - View Dependent Claims (10, 11, 12)
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13. A method for correcting optical distortion in an imaging system, comprising:
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determining a distortion profile of imaging optics at a plane, said distortion profile having a spatial component and an intensity component;
forming a sensor array of sensing pixels by arranging the sensing pixels in curved rows and columns based on the spatial component of the distortion profile;
placing the sensor array adjacent or at the plane to convert an image produced by the imaging optics into pixel signals that represent an electronic version of the image with a reduced amount of distortion; and
varying a size of a photosensitive area in each sensing pixel based on the intensity component of the distortion profile. - View Dependent Claims (14)
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15. An imaging device, comprising:
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a substrate formed of a semiconductor material;
an array of sensing pixels formed on said substrate and arranged relative to one another to form a spatial pattern that substantially matches a spatial component of a distortion profile produced by an imaging optics at its imaging plane, wherein said array, when placed at said imaging plane, is operable to produce pixel signals indicative of an image projected by said imaging optics, wherein each sensing pixel has a photosensitive area whose size is based on an intensity component of the distortion profile to correct a distortion in an intensity distribution across said array; and
a processing circuit coupled to said array to read out said pixel signals to construct said imaging with a reduced distortion. - View Dependent Claims (16, 17, 18, 19)
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20. An imaging device, comprising:
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a substrate formed of a semiconductor material;
an array of sensing pixels formed on said substrate and arranged relative to one another to form a spatial pattern that substantially matches a spatial component of a distortion profile produced by an imaging optics at its imaging plane, wherein said array, when placed at said imaging plane, is operable to produce pixel signals indicative of an image projected by said imaging optics; and
a processing circuit coupled to said array to read out said pixel signals to construct said imaging with a reduced distortion;
wherein said sensing pixels each have photosensitive areas that are substantially identical to one another, and said processing circuit is configured to modify said pixel signals to correct for an intensity component of the distortion profile. - View Dependent Claims (21)
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22. An imaging device, comprising:
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imaging optics to receive radiation from an object and to project an image of the object to an image plane, wherein said imaging optics produces a distortion having a distortion profile at least in a portion of said image, wherein said distortion is a variance in intensity; and
a semiconductor sensor array located adjacent or at said image plane to receive said image and having a plurality of sensing pixels for producing pixel signals; and
a processing circuit for processing said pixel signals to produce a digital image;
wherein at least one of said sensor array and processing circuit is arranged to reduce said distortion profile in said digital image. - View Dependent Claims (23, 24, 25, 26, 27)
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Specification