Patent US4303945A successfully refreshed from Google Patents.
US4303945A
Expired / Lapsed
US
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Image motion compensation for a TV sensor system
Assignee: Northrop Grumman Corp
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Filing: 1977-03-21
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Granted: 1981-12-01
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Expires: 1997-03-21
Abstract
Abstract An image motion compensation arrangement for a TV sensor system having an image intensifier section and a camera tube section, and which moves at a velocity V over a target area at an altitude H. An electron image of the viewed scene is accelerated between electrodes in the image intensifier section and a deflection coil is added to deflect this electron image. The coil is provided with a signal such that the deflection velocity is proportional to the ratio of V/H. With automatic light control provided, the deflection signal is also made a function of a control signal which controls a high voltage power supply to the accelerating electrodes.
Inventors
- 👤 James M. Fawcett
- 👤 William F. Parrish
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:20
CPC Classifications
H; H04; H04N; H04N7/00; H04N7/002; H04N7/005
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
282 words
Motion compensation apparatus for a TV sensor system adapted for movement relative to a target area to be viewed, comprising: A. a TV sensor system including (i) an imaging device section and (ii) an image intensifier section coupled thereto; B. said imaging device section being operable to receive an energy image of a scene being viewed to provide a video signal indicative thereof; C. said image intensifier section including a photocathode which transforms an incident photon image of the viewed scene into an electron image; D. first and second image intensifier high voltage electrodes; E. a high voltage power supply connected to said electrodes for accelerating said electron image; F. means for coupling said image to said imaging device section; G. means for deriving a first signal indicative of the relative velocity, in a first predetermined direction, between said TV sensor system and said area to be viewed; H. means for deriving a second signal indicative of the distance from said TV sensor system to said area to be viewed; I. ramp generator means for providing a third signal whose amplitude periodically varies with time; J. deflection coil means positioned relative to said image intensifier section to deflect said electron image in a first direction; K. a control circuit operable to provide an output control signal to control the voltage of said power supply; L. means for deriving a fourth signal proportional to the square root of said control signal, said fourth signal being indicative of the velocity of said accelerated electron image; and M. means for combining said first, second, third and fourth signals for deriving a coil drive signal and applying said coil drive signal to said deflection coil means.
Claim 2
Dependent Claim
282 words
Motion compensation apparatus for a TV sensor system adapted for movement relative to a target area to be viewed, comprising: A. a TV sensor system including (i) an imaging device section and (ii) an image intensifier section coupled thereto; B. said imaging device section being operable to receive an energy image of a scene being viewed to provide a video signal indicative thereof; C. said image intensifier section including a photocathode which transforms an incident photon image of the viewed scene into an electron image; D. first and second image intensifier high voltage electrodes; E. a high voltage power supply connected to said electrodes for accelerating said electron image; F. means for coupling said image to said imaging device section; G. means for deriving a first signal indicative of the relative velocity, in a first predetermined direction, between said TV sensor system and said area to be viewed; H. means for deriving a second signal indicative of the distance from said TV sensor system to said area to be viewed; I. ramp generator means for providing a third signal whose amplitude periodically varies with time; J. deflection coil means positioned relative to said image intensifier section to deflect said electron image in a first direction; K. a control circuit operable to provide an output control signal to control the voltage of said power supply; L. means for deriving a fourth signal proportional to the square root of said control signal, said fourth signal being indicative of the velocity of said accelerated electron image; and M. means for combining said first, second, third and fourth signals for deriving a coil drive signal and applying said coil drive signal to said deflection coil means.
Claim 3
Dependent Claim
282 words
Motion compensation apparatus for a TV sensor system adapted for movement relative to a target area to be viewed, comprising: A. a TV sensor system including (i) a TV camera pick-up tube of the type wherein an electron beam scans a target member which receives an energy image of a scene being viewed to derive a video signal indicative thereof, and which tube exhibits a certain tube lag characteristic and (ii) an image intensifier section coupled thereto; B. said image intensifier section including a photocathode which transforms an incident photo image of the viewed scene into an electron image; C. first and second image intensifier high voltage electrodes; D. a high voltage power supply connected to said electrodes for accelerating said electron image; E. means for coupling said image to said imaging device section; F. means for deriving a first signal indicative of the relative velocity, in a first predetermined direction, between said TV sensor system and said area to be viewed; G. means for deriving a second signal indicative of the distance from said TV sensor system to said area to be viewed; H. ramp generator means for providing a third signal whose amplitude periodically varies with time and whose period is a multiple of the TV frame time; I. deflection coil means positioned relative to said image intensifier section to deflect said electron image in a first direction; J. means for combining said first, second and third signals for deriving a coil drive signal and applying said coil drive signal to said deflection coil means; K. said video output signal being comprised of a series of TV frames; and L. means for displaying only every n th frame, where n>1.
Claim 4
Dependent Claim
282 words
Motion compensation apparatus for a TV sensor system adapted for movement relative to a target area to be viewed, comprising: A. a TV sensor system including (i) a TV camera pick-up tube of the type wherein an electron beam scans a target member which receives an energy image of a scene being viewed to derive a video signal indicative thereof, and which tube exhibits a certain tube lag characteristic and (ii) an image intensifier section coupled thereto; B. said image intensifier section including a photocathode which transforms an incident photo image of the viewed scene into an electron image; C. first and second image intensifier high voltage electrodes; D. a high voltage power supply connected to said electrodes for accelerating said electron image; E. means for coupling said image to said imaging device section; F. means for deriving a first signal indicative of the relative velocity, in a first predetermined direction, between said TV sensor system and said area to be viewed; G. means for deriving a second signal indicative of the distance from said TV sensor system to said area to be viewed; H. ramp generator means for providing a third signal whose amplitude periodically varies with time and whose period is a multiple of the TV frame time; I. deflection coil means positioned relative to said image intensifier section to deflect said electron image in a first direction; J. means for combining said first, second and third signals for deriving a coil drive signal and applying said coil drive signal to said deflection coil means; K. said video output signal being comprised of a series of TV frames; and L. means for displaying only every n th frame, where n>1.
Claim 5
Dependent Claim
277 words
Motion compensation apparatus for a TV sensor system adapted for movement relative to a target area to be viewed, comprising: A. a TV sensor system including (i) an imaging device section and (ii) an image intensifier section coupled thereto; B. said imaging device section being operable to receive an energy image of a scene being viewed to provide a video signal indicative thereof; C. said image intensifier section including a photocathode which transforms an incident photon image of the viewed scene into an electron image; D. first and second image intensifier high voltage electrodes; E. a high voltage power supply connected to said electrodes for accelerating said electron image; F. means for coupling said image to said imaging device section; G. means for deriving a first signal indicative of the relative velocity, in a first predetermined direction, between said TV sensor system and said area to be viewed; H. means for deriving a second signal indicative of the distance from said TV sensor system to said area to be viewed; I. ramp generator means for providing a third signal whose amplitude periodically varies with time; J. deflection coil means positioned relative to said image intensifier section to deflect said electron image in a first direction; K. means for deriving a fourth signal indicative of the velocity of said accelerated electron image; L. means for dividing said first signal by said second signal and multiplying the result of said division by said third signal; and M. means for multiplying the result of said multiplication by said fourth signal for deriving a coil drive signal; and N. means for applying said coil drive signal to said deflection coil means.
Claim 6
Dependent Claim
277 words
Motion compensation apparatus for a TV sensor system adapted for movement relative to a target area to be viewed, comprising: A. a TV sensor system including (i) an imaging device section and (ii) an image intensifier section coupled thereto; B. said imaging device section being operable to receive an energy image of a scene being viewed to provide a video signal indicative thereof; C. said image intensifier section including a photocathode which transforms an incident photon image of the viewed scene into an electron image; D. first and second image intensifier high voltage electrodes; E. a high voltage power supply connected to said electrodes for accelerating said electron image; F. means for coupling said image to said imaging device section; G. means for deriving a first signal indicative of the relative velocity, in a first predetermined direction, between said TV sensor system and said area to be viewed; H. means for deriving a second signal indicative of the distance from said TV sensor system to said area to be viewed; I. ramp generator means for providing a third signal whose amplitude periodically varies with time; J. deflection coil means positioned relative to said image intensifier section to deflect said electron image in a first direction; K. means for deriving a fourth signal indicative of the velocity of said accelerated electron image; L. means for dividing said first signal by said second signal and multiplying the result of said division by said third signal; and M. means for multiplying the result of said multiplication by said fourth signal for deriving a coil drive signal; and N. means for applying said coil drive signal to said deflection coil means.
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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) | 1984-11-30 | 1985-06-01 | 1985-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-30 | 1989-06-01 | 1989-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-30 | 1993-06-01 | 1993-12-01 | $7700.00 | Window Closed / Lapsed |