Patent US3786180A successfully refreshed from Google Patents.
US3786180A
Expired / Lapsed
US
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Fourier transforming system
Assignee: SRI International Inc
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Filing: 1972-07-31
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Granted: 1974-01-15
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Expires: 1992-07-31
Abstract
Abstract A Fourier transform of a two-dimensional scene may be made by viewing that scene with a television camera. The output of the scene modulates a source of coherent light, which is then divided into two light beams. One beam of coherent light is deflected by a light deflection system synchronously with the television camera, so that its angle of impingement on an integrating plane is varied accordingly. The undeflected light beam is also directed at the integrating plane where both light beams are integrated by either a photographic film or another television camera and thereby forms a Fourier transform of the scene. The film records the magnitude of the Fourier transform while the second television camera provides electrical signals representative thereof.
Inventors
- 👤 A Macovski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:02
CPC Classifications
G; G03; G03H; G03H1/00; G03H1/04; G03H1/16; H; H04; H04N; H04N5/00; H04N5/76; H04N5/89; H04N7/00; H04N7/002; H04N7/005
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
138 words
The method of obtaining a Fourier transform of a scene, comprising: viewing said scene with a television camera, generating a first and second coherent light beam, deriving from said television camera amplitude modulated signals generated by viewing said scene, deriving from said television camera scanning deflection signals used by said camera in viewing said scene, amplitude modulating at least one of said first and second coherent light beams in response to said camera amplitude modulated signals to provide an amplitude modulated light beam, angularly deflecting at least one of said first and second coherent light beams in response to said camera deflection signals to produce a deflected light beam, and directing all of said light beams at the same area of a plane to interfere with each other, where at the Fourier transform of said scene is produced.
Claim 2
Independent Claim
138 words
The method of obtaining a Fourier transform of a scene, comprising: viewing said scene with a television camera, generating a first and second coherent light beam, deriving from said television camera amplitude modulated signals generated by viewing said scene, deriving from said television camera scanning deflection signals used by said camera in viewing said scene, amplitude modulating at least one of said first and second coherent light beams in response to said camera amplitude modulated signals to provide an amplitude modulated light beam, angularly deflecting at least one of said first and second coherent light beams in response to said camera deflection signals to produce a deflected light beam, and directing all of said light beams at the same area of a plane to interfere with each other, where at the Fourier transform of said scene is produced.
Claim 3
Dependent Claim
21 words
The method as recited in claim 1 including the step of integrating said light beams at the area of said plane.
Claim 4
Dependent Claim
26 words
The method as recited in claim 1 Wherein both said first and second light beams are amplitude modulated in response to said camera amplitude modulated signals.
Claim 5
Dependent Claim
24 words
The method as recited in claim 1 wherein both said first and second light beams are deflected in response to said camera deflection signals.
Claim 6
Dependent Claim
92 words
The method as recited in claim 1 including recording at said plane the results of a first complete scan of said scene by said television camera, shifting the phase angle of said undeflected one of said two light beams ninety degrees relative to to the phase angle it had during the interval of the first complete scan of said scene, recording at said plane the results of a second complete scan of said scene by said television camera, optically reproducing said two recordings, and superimposing said two optical recordings on one another.
Claim 7
Dependent Claim
27 words
The method as recited in claim 1 wherein said step of angularly deflecting comprises angularly deflecting about an axis located at the center of the light beam.
Claim 8
Dependent Claim
27 words
The method as recited in claim 1 wherein said step of angularly deflecting comprises angularly deflecting about an axis located at one edge of the light beam.
Claim 9
Dependent Claim
118 words
Apparatus for obtaining a Fourier transform of a scene comprising: television camera means for scanning said scene and generating horizontal and vertical deflection signals and amplitude modulated signals representative of said scene, laser means for generating a first and second coherent light beam, means for amplitude modulating at least one of said coherent light beams with said amplitude modulated signals to produce an amplitude modulated light beam, means for angularly deflecting at least one of said coherent light beams with said deflecting signals to produce a deflected light beam, and means for directing all of said light beams at the same area of a plane to interfere with each other and produce a Fourier transform of said scene.
Claim 10
Dependent Claim
118 words
Apparatus for obtaining a Fourier transform of a scene comprising: television camera means for scanning said scene and generating horizontal and vertical deflection signals and amplitude modulated signals representative of said scene, laser means for generating a first and second coherent light beam, means for amplitude modulating at least one of said coherent light beams with said amplitude modulated signals to produce an amplitude modulated light beam, means for angularly deflecting at least one of said coherent light beams with said deflecting signals to produce a deflected light beam, and means for directing all of said light beams at the same area of a plane to interfere with each other and produce a Fourier transform of said scene.
Claim 11
Dependent Claim
18 words
Apparatus as recited in claim 8 including means at said plane for integrating the light beams directly thereat.
Claim 12
Dependent Claim
23 words
Apparatus as recited in claim 8 wherein both said first and second light beams are amplitude modulated by said means for amplitude modulating.
Claim 13
Dependent Claim
21 words
Apparatus as recited in claim 8 wherein both said first and second light beams are deflected by said means for deflecting.
Claim 14
Dependent Claim
35 words
Apparatus as recited in claim 8 wherein said means for angularly deflecting deflects at least one of said coherent light beams about an axis located at the center of said one of said light beams.
Claim 15
Dependent Claim
35 words
Apparatus as recited in claim 8 wherein said means for angularly deflecting deflects at least one of said coherent light beams about an axis located at one edge of said one of said light beams.
References Cited (Backward Citations)
US3643017A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-14 | 1977-07-16 | 1978-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-14 | 1981-07-16 | 1982-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-14 | 1985-07-16 | 1986-01-15 | $7700.00 | Window Closed / Lapsed |