US4389092A
Expired / Lapsed
US
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High speed ambiguity function evaluation by optical processing utilizing a space variant linear phase shifter
Assignee: Honeywell Inc
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Filing: 1980-07-29
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Granted: 1983-06-21
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Expires: 2000-07-29
Abstract
Abstract A system for using optical data processing means to create the ambiguity function for two signals is disclosed. One-dimensional spatial light modulators are employed to code the signals into a beam of substantially coherent light. After the light has been coded with the first one-dimensional signal a Fourier Transform is performed by lens means. A linear phase shifter is placed in the Fourier Transform plane. This has the effect of creating a linear dependence along a second dimension when a second Fourier Transform is performed.
Inventors
- 👤 Poohsan N. Tamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:40
CPC Classifications
G; G06; G06E; G06E3/00; G06E3/001; G02; G02B; G02B27/00; G02B27/42; G02B27/46
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
120 words
An optical system utilizing a beam of substantially coherent light to create the ambiguity function arising from a first signal and a second signal, said system comprising: a first data input means for coding said light beam with said first signal; a first Fourier Transform lens lying in the path of the coded light beam and a Fourier Transform Plane associated therewith; a linear phase shifter lying in the path of said coded light beam in said Fourier Transform plane; a second data input means for coding the phase shifted light beam with said second signal; and a final Fourier Transform lens means lying in the path of said light beam for producing the ambiguity function at an ambiguity plane.
Claim 2
Dependent Claim
120 words
An optical system utilizing a beam of substantially coherent light to create the ambiguity function arising from a first signal and a second signal, said system comprising: a first data input means for coding said light beam with said first signal; a first Fourier Transform lens lying in the path of the coded light beam and a Fourier Transform Plane associated therewith; a linear phase shifter lying in the path of said coded light beam in said Fourier Transform plane; a second data input means for coding the phase shifted light beam with said second signal; and a final Fourier Transform lens means lying in the path of said light beam for producing the ambiguity function at an ambiguity plane.
Claim 3
Dependent Claim
39 words
The optical system utilizing a beam of substantially coherent light to create the ambiguity function arising from a first signal and a second signal as described in claim 1 where the linear phase shifter is of the transmission type.
Claim 4
Dependent Claim
39 words
The optical system utilizing a beam of substantially coherent light to create the ambiguity function arising from a first signal and a second signal as described in claim 1 where the linear phase shifter is of the reflection type.
Claim 5
Dependent Claim
43 words
The optical system utilizing a beam of substantially coherent light to create the ambiguity function arising from a first signal and a second signal as described in claim 1, 2, or 3 where the first and second data input means comprise Bragg cells.
Claim 6
Dependent Claim
21 words
The optical system according to claim 1, 2 or 3 and further comprising: readout light detecting means at said ambiguity plane.
Claim 7
Dependent Claim
16 words
The optical system according to claim 5 where the readout light detecting means comprises a vidicon.
Claim 8
Dependent Claim
18 words
The optical system according to claim 6 where the first and second data input means comprise Bragg cells.
Claim 9
Dependent Claim
18 words
The optical system according to claim 5 wherein the readout light detecting means comprise an array of photodetectors.
Claim 10
Dependent Claim
18 words
The optical system according to claim 8 where the first and second data input means comprise Bragg cells.
References Cited (Backward Citations)
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 |