US4389633A
Expired / Lapsed
US
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Coded aperture imaging with self-supporting uniformly redundant arrays
Assignee: ENERGY United States, Department of
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Filing: 1980-09-26
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Granted: 1983-06-21
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Expires: 2000-09-26
Abstract
Abstract A self-supporting uniformly redundant array pattern for coded aperture imaging. The present invention utilizes holes which are an integer times smaller in each direction than holes in conventional URA patterns. A balance correlation function is generated where holes are represented by 1's, nonholes are represented by -1's, and supporting area is represented by 0's. The self-supporting array can be used for low energy applications where substrates would greatly reduce throughput. The balance correlation response function for the self-supporting array pattern provides an accurate representation of the source of nonfocusable radiation.
Inventors
- 👤 Edward E. Fenimore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:17
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: 4
Claim 1
Independent Claim
134 words
A self-supporting uniformly redundant array aperture imaging device for imaging a source of nonfocusable radiation comprising: a self-supporting uniformly redundant array aperture having holes which are of a size equal to c/n where c is the spacing between possible hole locations and n is an integer, said holes of said self-supporting uniformly redundant array formed at corresponding positions within hole locations of said uniformly redundant array; means for detecting said nonfocusable radiation imaged by said uniformly redundant array; means for balance correlating information from said means for detecting to generate a decoded image of said source of said nonfocusable radiation, said means for balance correlating information from said means for detecting comprising a balance correlation function wherein holes are represented by 1, nonholes are represented by -1, and supporting area is represented by 0.
Claim 2
Dependent Claim
134 words
A self-supporting uniformly redundant array aperture imaging device for imaging a source of nonfocusable radiation comprising: a self-supporting uniformly redundant array aperture having holes which are of a size equal to c/n where c is the spacing between possible hole locations and n is an integer, said holes of said self-supporting uniformly redundant array formed at corresponding positions within hole locations of said uniformly redundant array; means for detecting said nonfocusable radiation imaged by said uniformly redundant array; means for balance correlating information from said means for detecting to generate a decoded image of said source of said nonfocusable radiation, said means for balance correlating information from said means for detecting comprising a balance correlation function wherein holes are represented by 1, nonholes are represented by -1, and supporting area is represented by 0.
Claim 3
Dependent Claim
138 words
A self-supporting uniformly redundant array aperture imaging device for imaging low energy nonfocusable radiation comprising: a self-supporting uniformly redundant array aperture aligned to aperture image said nonfocusable radiation, said self-supporting uniformly redundant array comprising an aperture having holes of size c/n placed at (u, v) such that u=c·i, v=c·j, where the basic array has dimensions r by s, r and s are prime numbers, r-s=2, A(mod r i, mod s j)=1, 0≦i≦2r, 0≦j≦2s, n is an integer and c is the spacing between possible hole locations; means for detecting said nonfocusable radiation imaged by said uniformly redundant array; and, means for balance correlating information from said means for detecting to generate a decoded image of said source of said nonfocusable radiation, said means for balance correlating information from said means for detecting comprising a function G(I,J) wherein: ##EQU3##
Claim 4
Dependent Claim
138 words
A self-supporting uniformly redundant array aperture imaging device for imaging low energy nonfocusable radiation comprising: a self-supporting uniformly redundant array aperture aligned to aperture image said nonfocusable radiation, said self-supporting uniformly redundant array comprising an aperture having holes of size c/n placed at (u, v) such that u=c·i, v=c·j, where the basic array has dimensions r by s, r and s are prime numbers, r-s=2, A(mod r i, mod s j)=1, 0≦i≦2r, 0≦j≦2s, n is an integer and c is the spacing between possible hole locations; means for detecting said nonfocusable radiation imaged by said uniformly redundant array; and, means for balance correlating information from said means for detecting to generate a decoded image of said source of said nonfocusable radiation, said means for balance correlating information from said means for detecting comprising a function G(I,J) wherein: ##EQU3##
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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) | 1986-06-20 | 1986-12-20 | 1987-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-06-20 | 1990-12-20 | 1991-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-06-20 | 1994-12-20 | 1995-06-21 | $7700.00 | Window Closed / Lapsed |