Patent US3660663A successfully refreshed from Google Patents.
US3660663A
Expired / Lapsed
US
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Radiation detection system using pseudo-random reversible scanning techniques
Assignee: US Philips Corp
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Filing: 1969-05-02
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Granted: 1972-05-02
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Expires: 1989-05-02
Abstract
Abstract An imaging system including means for scanning a linear array of detectors across the scene to viewed field by field, consecutive fields being scanned in opposite directions. Every picture element of the scene is reproduced once during a frame, which is made up of at least two fields and preferably an integral multiple of two. The system also includes means for sampling the detectors in a pseudo random pattern. The sampled signals are multiplexed and displayed on a CRT having an electron beam that is deflected in synchronism with the sampling pattern. Each field is divided into a non-integral number of vertical areas.
Inventors
- 👤 Leslie Henry Guildford
- 👤 Richard Frank Mitchell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:05
CPC Classifications
H; H04; H04N; H04N7/00; H04N7/002; H04N7/005; H04N3/00; H04N3/10; H04N3/30
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
97 words
An imaging system comprising an array of detectors which are sensitive to radiation from a scene to be viewed, means for scanning the scene to project the radiation on said array of detectors field by field, means for sampling the detectors in a pseudo-random pattern so that each detector is sampled once for every picture element it traverses in a frame, a display apparatus, means for displaying the picture elements of the scene viewed by the deTectors similarly field by field on said display apparatus, each frame comprising at least two fields scanned successively in opposite directions.
Claim 2
Dependent Claim
97 words
An imaging system comprising an array of detectors which are sensitive to radiation from a scene to be viewed, means for scanning the scene to project the radiation on said array of detectors field by field, means for sampling the detectors in a pseudo-random pattern so that each detector is sampled once for every picture element it traverses in a frame, a display apparatus, means for displaying the picture elements of the scene viewed by the deTectors similarly field by field on said display apparatus, each frame comprising at least two fields scanned successively in opposite directions.
Claim 3
Dependent Claim
74 words
An imaging system as claimed in claim 1 wherein each field is divided into a non-integral number of areas while an integral number of said areas make up a frame, the non-integral portion of an area remaining at the end of one field being completed in the following field which is scanned in the opposite direction, each detector of said array being sampled once each time said array scans an area of a field.
Claim 4
Dependent Claim
23 words
An imaging system as claimed in claim 2 in which the number of fields forming a frame is an integral multiple of two.
Claim 5
Dependent Claim
37 words
An imaging system as claimed in claim 2, characterized in that the array of detectors are sampled in a pseudo-random pattern in their scan over an area, said pattern being identical for each scan over each area.
Claim 6
Dependent Claim
25 words
An imaging system as claimed in claim 3 wherein the radiation from the scene is infrared radiation and said array of detectors being infrared sensitive.
Claim 7
Dependent Claim
26 words
An imaging system as claimed in claim 3 wherein the radiation from the scene is visible light and said array of detectors is comprised of photocells.
Claim 8
Dependent Claim
49 words
An imaging system as claimed in claim 1 wherein said scanning means includes means for sweeping the scene to produce a field motion in a given direction, said system further comprising a pseudo random scan generator for producing a waveform for scanning at right angles to the field motion.
Claim 9
Dependent Claim
24 words
An imaging system as claimed in claim 7 wherein said pseudo-random scan generator comprises a binary divider stage driven by a clock pulse generator.
Claim 10
Dependent Claim
45 words
An imaging system as claimed in claim 8 wherein said sampling means includes a plurality of gate circuits coupling said detector array to the display apparatus, and means for coupling the output of said binary divider to said gate circuits to control the operation thereof.
Claim 11
Dependent Claim
26 words
An imaging system as claimed in claim 7 wherein the pseudo random sampling pattern for said array of detectors is generated by said pseudo-random scan generator,
Claim 12
Dependent Claim
61 words
An imaging system as claimed in claim 1 further comprising a cathode ray tube display device for reproducing the viewed scene, and wherein said sampling means comprises a pseudo-random scan generator that produces an output signal for controlling the sampling of the detectors, and means for coupling said scan generator to one set of deflection coils of said cathode ray tube.
Claim 13
Dependent Claim
131 words
A display system in which all of the picture elements of a scene to be viewed are reproduced during a frame, each frame comprising at least two fields scanned consecutively in opposite directions, said system comprising, an array of detectors responsive to the radiation from the scene, means for scanning the scene to project the radiation therefrom onto the array of detectors field by field, consecutive fields being scanned in opposite directions, means for sampling the detectors in sequence in a pseudo random pattern relative to the field motion, a display device coupled to the output of said detector array, and means for synchronizing the display device with said sampling means so that the signal information developed by the detector array is similary displayed field by field on the display device.
Claim 14
Dependent Claim
131 words
A display system in which all of the picture elements of a scene to be viewed are reproduced during a frame, each frame comprising at least two fields scanned consecutively in opposite directions, said system comprising, an array of detectors responsive to the radiation from the scene, means for scanning the scene to project the radiation therefrom onto the array of detectors field by field, consecutive fields being scanned in opposite directions, means for sampling the detectors in sequence in a pseudo random pattern relative to the field motion, a display device coupled to the output of said detector array, and means for synchronizing the display device with said sampling means so that the signal information developed by the detector array is similary displayed field by field on the display device.
Claim 15
Dependent Claim
26 words
A display system as claimed in claim 12 wherein the detectors are arranged as an in-line array at right angles to the direction of field motion.
Claim 16
Dependent Claim
29 words
A display system as claimed in claim 12 wherein the detectors are positioned to form an in-line array arranged at an acute angle to the direction of field motion.
Claim 17
Dependent Claim
27 words
A display system as claimed in claim 13 wherein the number of fields forming a frame is greater than two and is an integral multiple of two.
Claim 18
Dependent Claim
73 words
A display system as claimed in claim 15 wherein said detectors are mounted in a vertical line and are simultaneously scanned across the scene in a horizontal direction to provide the field motion, said detectors being selectively sampled ouT of sequence in the vertical direction, and said display device includes a cathode ray tube with horizontal and vertical deflection means, said vertical deflection means being synchronized with the vertical sampling of the detectors.
Claim 19
Dependent Claim
36 words
A display system as claimed in claim 16 wherein said sampling means comprises a scan generator that produces a binary weighted output signal that is coupled to the vertical deflection means of said cathode ray tube.
Claim 20
Dependent Claim
57 words
A display system as claimed in claim 17 further comprising a multiplexing gate circuit interconnecting the detector array with a beam control electrode of the cathode ray tube, and means further coupling said binary weighted signal to said gate circuit to control the operation thereof in synchronism with the vertical deflection means of the cathode ray tube.
Claim 21
Dependent Claim
44 words
A display system as claimed in claim 13 wherein the number of fields forming a frame is an integral multiple of two, each field being divided into a non-integral number of areas to produce a scan overlap between consecutive fields making up a frame.
Claim 22
Dependent Claim
68 words
A display system as claimed in claim 13 wherein said scanning means is arranged to effectively scan the array of detectors across the scene so that the scene is divided into a number of lines simultaneously scanned by all of the detectors, said sampling means being arranged to sample the detectors in order in a pseudo-random repetitive pattern such that successive detectors sample different lines of the scene.
Claim 23
Dependent Claim
37 words
A display system as claimed in claim 19 wherein said sampling means is arranged so that each detector is sampled once for each of said areas and said pseudo-random pattern is repeated identically for each area scanned.
Claim 24
Dependent Claim
98 words
A display system as claimed in claim 13 wherein each field is divided into a non-integral number of vertical areas so that the non-integral portion of an area at the end of a field is scanned in both of said opposite directions, one direction at the end of the field and the opposite direction at the start of the next field, the number of fields forming a frame being an integral multiple of two, and wherein said sampling means samples each detector once as it scans each area and identically repeats the pseudo-random pattern for each area scanned.
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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) | 1975-05-02 | 1975-11-01 | 1976-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-02 | 1979-11-01 | 1980-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-02 | 1983-11-01 | 1984-05-02 | $7700.00 | Window Closed / Lapsed |