Patent US4228420A successfully refreshed from Google Patents.
US4228420A
Expired / Lapsed
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Mosaic of coded aperture arrays
Assignee: United States Department of Energy
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Filing: 1978-09-14
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Granted: 1980-10-14
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Expires: 1998-09-14
Abstract
Abstract The present invention pertains to a mosaic of coded aperture arrays which is capable of imaging off-axis sources with minimum detector size. Mosaics of the basic array pattern create a circular on periodic correlation of the object on a section of the picture plane. This section consists of elements of the central basic pattern as well as elements from neighboring patterns and is a cyclic version of the basic pattern. Since all object points contribute a complete cyclic version of the basic pattern, a section of the picture, which is the size of the basic aperture pattern, contains all the information necessary to image the object with no artifacts.
Inventors
- 👤 Edward E. Fenimore
- 👤 Thomas M. Cannon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:18
CPC Classifications
G; G01; G01T; G01T1/00; G01T1/29; G01T1/2914; G01T1/2921; G01T1/295; G03; G03H; G03H1/00; G03H1/04; G03H1/06
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
141 words
An imaging arrangement for a coded aperture imaging system comprising: a source of nonfocusable radiation; a position sensitive detector; mosaic array aperture means formed from a basic r by s array and neighboring cyclic versions of said basic r by s array adjacent to said basic r by s array, said mosaic array aperture means substantially aligned with said source of nonfocusable radiation and said position sensitive detector to form an encoded aperture image; said encoded aperture image formed by a circular correlation of said mosaic aperture array and said source of nonfocusable radiation such that all object source points of said source of nonfocusable radiation contribute a complete cyclic version of said basic r by s array within a minimal detector area for sources aligned off axis; means for reconstructing an image of said source from said encoded aperture image.
Claim 2
Dependent Claim
141 words
An imaging arrangement for a coded aperture imaging system comprising: a source of nonfocusable radiation; a position sensitive detector; mosaic array aperture means formed from a basic r by s array and neighboring cyclic versions of said basic r by s array adjacent to said basic r by s array, said mosaic array aperture means substantially aligned with said source of nonfocusable radiation and said position sensitive detector to form an encoded aperture image; said encoded aperture image formed by a circular correlation of said mosaic aperture array and said source of nonfocusable radiation such that all object source points of said source of nonfocusable radiation contribute a complete cyclic version of said basic r by s array within a minimal detector area for sources aligned off axis; means for reconstructing an image of said source from said encoded aperture image.
Claim 3
Dependent Claim
31 words
The imaging arrangement of claim 1 wherein said mosaic array aperture consists of a basic r by s uniformly redundant array and neighboring arrays to form a 2r by 2s aperture.
Claim 4
Dependent Claim
17 words
The aperture of claim 1 wherein said basic r by s array comprises a uniformly redundant array.
Claim 5
Dependent Claim
16 words
The aperture of claim 1 wherein said basic r by s array comprises a random 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) | 1983-10-14 | 1984-04-14 | 1984-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-10-14 | 1988-04-14 | 1988-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-10-14 | 1992-04-14 | 1992-10-14 | $7700.00 | Window Closed / Lapsed |