Patent US4209780A successfully refreshed from Google Patents.
US4209780A
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Coded aperture imaging with uniformly redundant arrays
Assignee: United States Department of Energy
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Filing: 1978-05-02
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Granted: 1980-06-24
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Expires: 1998-05-02
Abstract
Abstract A system utilizing uniformly redundant arrays to image non-focusable radiation. The uniformly redundant array is used in conjunction with a balanced correlation technique to provide a system with no artifacts such that virtually limitless signal-to-noise ratio is obtained with high transmission characteristics. Additionally, the array is mosaicked to reduce required detector size over conventional array detectors.
Inventors
- 👤 Edward E. Fenimore
- 👤 Thomas M. Cannon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:20
CPC Classifications
G; G01; G01T; G01T1/00; G01T1/29; G01T1/2914; G01T1/2921; G01T1/295
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
58 words
A device for imaging a source of nonfocusable radiation comprising: a uniformly redundant array aligned to aperture image said source of nonfocusable radiation; x-ray detector 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 nonfocusable radiation.
Claim 2
Independent Claim
58 words
A device for imaging a source of nonfocusable radiation comprising: a uniformly redundant array aligned to aperture image said source of nonfocusable radiation; x-ray detector 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 nonfocusable radiation.
Claim 3
Independent Claim
58 words
A device for imaging a source of nonfocusable radiation comprising: a uniformly redundant array aligned to aperture image said source of nonfocusable radiation; neutron detector 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 nonfocusable radiation.
Claim 4
Independent Claim
58 words
A device for imaging a source of nonfocusable radiation comprising: a uniformly redundant array aligned to aperture image said source of nonfocusable radiation; neutron detector 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 nonfocusable radiation.
Claim 5
Independent Claim
59 words
A device for imaging a source of nonfocusable radiation comprising: a uniformly redundant array aligned to aperture image said source of nonfocusable radiation; cosmic radiation detection 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 nonfocusable radiation.
Claim 6
Independent Claim
59 words
A device for imaging a source of nonfocusable radiation comprising: a uniformly redundant array aligned to aperture image said source of nonfocusable radiation; cosmic radiation detection 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 nonfocusable radiation.
Claim 7
Independent Claim
139 words
A device for imaging a source of nonfocusable radiation comprising: a uniformly redundant array aligned to aperture image said source of nonfocusable radiation, said uniformly redundant array comprising an aperture wherein: A(I,J)=0 if I=0 A(I,J)=1 if J=0, I≠0 A(I,J)=1 if C.sub.r (I)C.sub.s (J)=1 A( I,J)=0 otherwise where C.sub.r (I)=1 if there exists an integer x, 1≦x<r such that I=mod.sub.r x.sup.2 C.sub.r (I)=-1 otherwise and C.sub.s (J)=1 if there exists an integer x, 1≦x<s such that J=mod.sub.s x.sup.2 C.sub.s (J)=1 otherwise and r-s=2 with r and s prime numbers and, where A(I,J) is a function which represents locations on said aperture array for transmitting said nonfocusable radiation; 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 nonfocusable radiation.
Claim 8
Independent Claim
139 words
A device for imaging a source of nonfocusable radiation comprising: a uniformly redundant array aligned to aperture image said source of nonfocusable radiation, said uniformly redundant array comprising an aperture wherein: A(I,J)=0 if I=0 A(I,J)=1 if J=0, I≠0 A(I,J)=1 if C.sub.r (I)C.sub.s (J)=1 A( I,J)=0 otherwise where C.sub.r (I)=1 if there exists an integer x, 1≦x<r such that I=mod.sub.r x.sup.2 C.sub.r (I)=-1 otherwise and C.sub.s (J)=1 if there exists an integer x, 1≦x<s such that J=mod.sub.s x.sup.2 C.sub.s (J)=1 otherwise and r-s=2 with r and s prime numbers and, where A(I,J) is a function which represents locations on said aperture array for transmitting said nonfocusable radiation; 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 nonfocusable radiation.
Claim 9
Independent Claim
102 words
A device for imaging a source of nonfocusable radiation comprising: a uniformly redundant array aligned to aperture image said source of nonfocusable radiation; 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 nonfocusable radiation, said means for balance correlating information from said means for detecting comprising a function wherein: G(I,J)=1 if A(I,J)=1 G(I,J)=-ρ/(1-ρ) if A(I,J)=0 where ρ represents the fraction of transmissive area to nontransmissive area in the aperture, resulting in: ΣΣA(I,J)G(I+K,J+L)∝(rs-1)/2 of mod.sub.4 K=0 and Mod.sub.s L=0 ΣΣA(I,J)G(I+K,J+L)=0 otherwise.
Claim 10
Independent Claim
102 words
A device for imaging a source of nonfocusable radiation comprising: a uniformly redundant array aligned to aperture image said source of nonfocusable radiation; 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 nonfocusable radiation, said means for balance correlating information from said means for detecting comprising a function wherein: G(I,J)=1 if A(I,J)=1 G(I,J)=-ρ/(1-ρ) if A(I,J)=0 where ρ represents the fraction of transmissive area to nontransmissive area in the aperture, resulting in: ΣΣA(I,J)G(I+K,J+L)∝(rs-1)/2 of mod.sub.4 K=0 and Mod.sub.s L=0 ΣΣA(I,J)G(I+K,J+L)=0 otherwise.
Claim 11
Independent Claim
107 words
A device for imaging a source of nonfocusable radiation comprising: a uniformly redundant array aligned to aperture image said source of nonfocusable radiation, said uniformly redundant array comprising an aperture wherein: A(I,J) is periodic, that is: A(I,J)=A(I+r, J+s) where r and s are constants not equal to zero and A has a flat autocorrelation, that is: ##EQU3## where A(I,J) is a function which represents locations on said aperture array for transmitting said nonfocusable radiation; 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 nonfocusable radiation.
Claim 12
Independent Claim
107 words
A device for imaging a source of nonfocusable radiation comprising: a uniformly redundant array aligned to aperture image said source of nonfocusable radiation, said uniformly redundant array comprising an aperture wherein: A(I,J) is periodic, that is: A(I,J)=A(I+r, J+s) where r and s are constants not equal to zero and A has a flat autocorrelation, that is: ##EQU3## where A(I,J) is a function which represents locations on said aperture array for transmitting said nonfocusable radiation; 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 nonfocusable radiation.
Claim 13
Independent Claim
50 words
A device for imaging a source of nonfocusable radiation comprising: a uniformly redundant array aperture aligned to project an encoded image of said source of nonfocusable radiation; x-ray detector means for detecting said encoded images means for balance correlating said encoded image to generate a decoded image of said source.
Claim 14
Independent Claim
50 words
A device for imaging a source of nonfocusable radiation comprising: a uniformly redundant array aperture aligned to project an encoded image of said source of nonfocusable radiation; x-ray detector means for detecting said encoded images means for balance correlating said encoded image to generate a decoded image of said source.
Claim 15
Independent Claim
50 words
A device for imaging a source of nonfocusable radiation comprising: a uniformly redundant array aperture aligned to project an encoded image of said source of nonfocusable radiation; neutron detector means for detecting said encoded image; means for balance correlating said encoded image to generate a decoded image of said source.
Claim 16
Independent Claim
50 words
A device for imaging a source of nonfocusable radiation comprising: a uniformly redundant array aperture aligned to project an encoded image of said source of nonfocusable radiation; neutron detector means for detecting said encoded image; means for balance correlating said encoded image to generate a decoded image of said source.
Claim 17
Independent Claim
51 words
A device for imaging a source of nonfocusable radiation comprising: a uniformly redundant array aperture aligned to project an encoded imgage of said source of nonfocusable radiation; cosmic radiation detector means for detecting said encoded image; means for balance correlating said encoded image to generate a decoded image of said source.
Claim 18
Independent Claim
51 words
A device for imaging a source of nonfocusable radiation comprising: a uniformly redundant array aperture aligned to project an encoded imgage of said source of nonfocusable radiation; cosmic radiation detector means for detecting said encoded image; means for balance correlating said encoded image to generate a decoded image of said source.
Claim 19
Independent Claim
128 words
A device for imaging a source of nonfocusable radiation comprising: a uniformly redundant array aperture aligned to project an encoded image of said source of nonfocusable radiation, said uniformly redundant array comprising an aperture wherein: A(I,J)=0 if I=0 A(I,J)=1if J=0, I≠0 A(I,J)=1if C.sub.r (I)C.sub.s (J)=1 A(I,J)=0 otherwise where C r (I)=1 if there exists an integer x, 1≦x<r such that I=mod.sub.r x.sup.2 C.sub.r (I)=-1otherwise C s (J)=1 if there exists an integer x, 1≦x<s such that J=mod.sub.2 x.sup.2 C.sub.s (J)=-1 otherwise and r-s=2 with r and s prime numbers and, where A(I,J) is a function which represents locations on said aperture array for transmitting said nonfocusable radiation; means for detecting said encoded image; means for balance correlating said encoded image to generate a decoded image of said source.
Claim 20
Independent Claim
128 words
A device for imaging a source of nonfocusable radiation comprising: a uniformly redundant array aperture aligned to project an encoded image of said source of nonfocusable radiation, said uniformly redundant array comprising an aperture wherein: A(I,J)=0 if I=0 A(I,J)=1if J=0, I≠0 A(I,J)=1if C.sub.r (I)C.sub.s (J)=1 A(I,J)=0 otherwise where C r (I)=1 if there exists an integer x, 1≦x<r such that I=mod.sub.r x.sup.2 C.sub.r (I)=-1otherwise C s (J)=1 if there exists an integer x, 1≦x<s such that J=mod.sub.2 x.sup.2 C.sub.s (J)=-1 otherwise and r-s=2 with r and s prime numbers and, where A(I,J) is a function which represents locations on said aperture array for transmitting said nonfocusable radiation; means for detecting said encoded image; means for balance correlating said encoded image to generate a decoded image of said source.
Claim 21
Independent Claim
104 words
A device for imaging a source of nonfocusable radiation comprising: a uniformly redundant array aperture aligned to project an encoded image of said source of nonfocusable radiation, said uniformly redundant array comprising a function A(I,J) which has the following properties: A(I,J) is periodic, that is, A(I,J)=A(I+r, J+s) where r and s are constants not equal to zero, and A has a flat autocorrelation, that is, ##EQU4## where A(I,J) is a function which represents locations on said aperture array for transmitting said nonfocusable radiation; means for detecting said encoded image; means for balance correlating said encoded image to generate a decoded image of said source.
Claim 22
Independent Claim
104 words
A device for imaging a source of nonfocusable radiation comprising: a uniformly redundant array aperture aligned to project an encoded image of said source of nonfocusable radiation, said uniformly redundant array comprising a function A(I,J) which has the following properties: A(I,J) is periodic, that is, A(I,J)=A(I+r, J+s) where r and s are constants not equal to zero, and A has a flat autocorrelation, that is, ##EQU4## where A(I,J) is a function which represents locations on said aperture array for transmitting said nonfocusable radiation; means for detecting said encoded image; means for balance correlating said encoded image to generate a decoded image of said source.
Claim 23
Independent Claim
89 words
A device for imaging a source of nonfocusable radiation comprising: a uniformly redundant array aperture aligned to project an encoded image of said source of nonfocusable radiation; means for detecting said encoded image; means for balance correlating said encoded image to generate a decoded image of said source, said means for balance correlating said encoded image comprising a function wherein: G(I,J)=1if A(I,J)=1 G(I,J)=-ρ/(l-ρ) if A(I,J)=0 where ρ represents the fraction transmissive area to nontransmissive area in the aperture, resulting in: ΣΣA(I,J)G(I+K,J+L)∝(rs-1)/2 if mod.sub.r K=0 and mod.sub.s L=0 ΣΣA(I,J)G(I+K,J+I)=0 otherwise.
Claim 24
Independent Claim
89 words
A device for imaging a source of nonfocusable radiation comprising: a uniformly redundant array aperture aligned to project an encoded image of said source of nonfocusable radiation; means for detecting said encoded image; means for balance correlating said encoded image to generate a decoded image of said source, said means for balance correlating said encoded image comprising a function wherein: G(I,J)=1if A(I,J)=1 G(I,J)=-ρ/(l-ρ) if A(I,J)=0 where ρ represents the fraction transmissive area to nontransmissive area in the aperture, resulting in: ΣΣA(I,J)G(I+K,J+L)∝(rs-1)/2 if mod.sub.r K=0 and mod.sub.s L=0 ΣΣA(I,J)G(I+K,J+I)=0 otherwise.
Claim 25
Dependent Claim
32 words
A uniformly redundant array aperture described as follows: ##EQU5## and r-s=2 with r and s prime numbers and, where A(I,J) is a function which represents locations on said array for transmitting radiation.
Claim 26
Dependent Claim
32 words
A uniformly redundant array aperture described as follows: ##EQU5## and r-s=2 with r and s prime numbers and, where A(I,J) is a function which represents locations on said array for transmitting radiation.
Claim 27
Dependent Claim
78 words
A coded aperture imaging system comprising: a source of nonfocusable radiation; a uniformly redundant array coded aperture; means for detecting said nonfocusable radiation encoded by said coded aperture to produce a coded output signal; means for digitizing said coded output signal; means for analyzing pulse height of said coded output signal; means for storing pulse height analyzed data; p1 means for balance correlating said data to obtain a decoded image signal; means for displaying said decoded image signal.
Claim 28
Dependent Claim
78 words
A coded aperture imaging system comprising: a source of nonfocusable radiation; a uniformly redundant array coded aperture; means for detecting said nonfocusable radiation encoded by said coded aperture to produce a coded output signal; means for digitizing said coded output signal; means for analyzing pulse height of said coded output signal; means for storing pulse height analyzed data; p1 means for balance correlating said data to obtain a decoded image signal; means for displaying said decoded image signal.
Claim 29
Dependent Claim
19 words
The system of claim 14 wherein said means for balance correlating comprises scan control means and an adding register.
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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) | 1983-06-24 | 1983-12-24 | 1984-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-06-24 | 1987-12-24 | 1988-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-06-24 | 1991-12-24 | 1992-06-24 | $7700.00 | Window Closed / Lapsed |