US5541652A
Expired / Lapsed
US
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Hyperacuity sensing
Assignee: Xerox Corp
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Filing: 1995-04-21
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Granted: 1996-07-30
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Expires: 2015-04-21
Abstract
Abstract Methods and devices for implementing hyperacuity sensing are provided. The imaging device comprises a sensor array including sensor elements, each of which provides intracellular spatial intensity distribution information necessary to render images with subpixel accuracy. The method includes the step of hyperacuity sensing implemented using sensors that output signals that are dependent upon the internal intensity distribution of impinging light. The output signals are processed to determine the internal intensity distribution, which can then be used to produce a hyperacuity image. Such a hyperacuity image has enhanced definition of edges, and reduced artifacts such as jaggies and moire effects.
Inventors
- 👤 Warren B. Jackson
- 👤 David K. Biegelsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 16:17
CPC Classifications
H; H04; H04N; H04N25/00; H04N25/70; H04N25/76; H04N25/50
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
140 words
A sensor assembly for constructing a hyperacuity approximation of an image, the sensor assembly comprising a plurality of sensor elements positioned in an imaging array, with each sensor element in the imaging array having a defined area of less than one square centimeter for detecting incident radiation to provide a first output representative of total incident radiation intensity on each defined area, and a plurality of radiation detectors, with at least one radiation detector positioned within each defined area of each of the plurality of sensor elements in the imaging array, the at least one radiation detector in each defined area providing a second output approximating an intensity distribution of incident radiation within each of the defined areas of the plurality of sensor elements, with the first and second outputs together used to construct said hyperacuity approximation of the image.
Claim 2
Dependent Claim
140 words
A sensor assembly for constructing a hyperacuity approximation of an image, the sensor assembly comprising a plurality of sensor elements positioned in an imaging array, with each sensor element in the imaging array having a defined area of less than one square centimeter for detecting incident radiation to provide a first output representative of total incident radiation intensity on each defined area, and a plurality of radiation detectors, with at least one radiation detector positioned within each defined area of each of the plurality of sensor elements in the imaging array, the at least one radiation detector in each defined area providing a second output approximating an intensity distribution of incident radiation within each of the defined areas of the plurality of sensor elements, with the first and second outputs together used to construct said hyperacuity approximation of the image.
Claim 3
Dependent Claim
43 words
The array according to claim 1, wherein the second output from the at least one radiation detector can be converted into an approximation of an edge position of the incident radiation within each of the defined areas of the plurality of sensor elements.
Claim 4
Dependent Claim
19 words
The array according to claim 1, wherein each of the plurality of sensor elements are sensitive to light radiation.
Claim 5
Dependent Claim
30 words
The array according to claim 2, wherein the second output further comprises output from four radiation detectors positioned within each of the defined areas of the plurality of sensor elements.
Claim 6
Dependent Claim
19 words
The array according to claim 1, wherein each of the plurality of sensor elements are sensitive to electron radiation.
Claim 7
Dependent Claim
13 words
The array according to claim 2, wherein the sensor elements have hexagonal shape.
Claim 8
Dependent Claim
21 words
The array according to claim 3, wherein each of the plurality of sensor elements are hexagonally arranged in the imaging array.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-07-30 | 2000-01-29 | 2000-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-07-30 | 2004-01-29 | 2004-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-07-30 | 2008-01-29 | 2008-07-30 | $7700.00 | Window Closed / Lapsed |