US4152729A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image motion compensation system
Assignee: BAE Systems Electronics Ltd
•
Filing: 1977-12-01
•
Granted: 1979-05-01
•
Expires: 1997-12-01
Abstract
Abstract The invention provides an image motion compensation arrangement for enabling stabilization of the line of sight of a scanned imaging system mounted on a vehicle. In one example the scanned imaging system is a television camera assembly which is resiliently mounted and carries a plane mirror on to which is directed, via an auto-collimating lens, light from a light emitting diode. Light reflected by the plane mirror passes back through the auto-collimating lens to be received by a detector having quadrant receiving surfaces which resolve the complex motion of the camera assembly during movement of the vehicle into two orthogonal components defining the angular error caused by the motion in the sight line of the camera. The two orthogonal components are utilized to provide a pair of electrical signals utilizable to correct for the image motion resulting from the rotation of the sight line.
Inventors
- 👤 William E. Hobbs
- 👤 William J. R. Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:46
CPC Classifications
F; F41; F41G; F41G3/00; F41G3/22; G; G01; G01S; G01S3/00; G01S3/78; G01S3/782; G01S3/783; G02; G02B; G02B27/00; G02B27/64; G02B27/644
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
141 words
An image motion compensation arrangement for enabling stabilization of the line of sight of a television camera assembly resiliently mounted on a vehicle, including an optical system consisting of a first part constituted by a reflector and a second part constituted by a light source and a photodetector arranged to receive an image of the light source after reflection at said reflector, one part being rigidly coupled to the television camera assembly and the other part being rigidly coupled to the vehicle, said camera assembly including a camera tube, means for deriving from the photodetector electrical signals representative of the angular components of motion of the television camera assembly relative to the vehicle, and means responsive to said derived electrical signals for offsetting an output image of said camera tube by an amount to compensate for said angular components of motion.
Claim 2
Dependent Claim
141 words
An image motion compensation arrangement for enabling stabilization of the line of sight of a television camera assembly resiliently mounted on a vehicle, including an optical system consisting of a first part constituted by a reflector and a second part constituted by a light source and a photodetector arranged to receive an image of the light source after reflection at said reflector, one part being rigidly coupled to the television camera assembly and the other part being rigidly coupled to the vehicle, said camera assembly including a camera tube, means for deriving from the photodetector electrical signals representative of the angular components of motion of the television camera assembly relative to the vehicle, and means responsive to said derived electrical signals for offsetting an output image of said camera tube by an amount to compensate for said angular components of motion.
Claim 3
Dependent Claim
34 words
An arrangement as claimed in claim 1 wherein said first part is the part rigidly coupled to the television camera assembly, and the said second part is the part rigidly coupled to the vehicle.
Claim 4
Dependent Claim
30 words
An arrangement as claimed in claim 1 wherein said television camera assembly comprises a part only of a television camera said part comprising a camera tube and a yoke therefor.
Claim 5
Dependent Claim
14 words
An arrangement as claimed in claim 1 wherein the reflector is a plane reflector.
Claim 6
Dependent Claim
62 words
An arrangement as claimed in claim 4 wherein the optical system is an auto collimator in which both the light source and the photodetector are positioned in the same focal plane of a lens so that a parallel beam of light is produced which is incident upon the plane reflector, returned to the lens and brought to a focus at the photodetector.
Claim 7
Dependent Claim
28 words
An arrangement as claimed in claim 1 wherein the photodetector comprises a quadrant detector operative to resolve the angular components of motion along a pair of orthogonal axes.
Claim 8
Dependent Claim
16 words
An arrangement as claimed in claim 6 wherein the quadrant detector is a silicon quadrant cell.
Claim 9
Dependent Claim
21 words
An arrangement as claimed in claim 1 wherein said camera tube includes deflection coil means responsive to said derived electrical signals.
Claim 10
Dependent Claim
14 words
An arrangement as claimed in claim 8 wherein the reflector is a plane reflector.
Claim 11
Dependent Claim
62 words
An arrangement as claimed in claim 9 wherein the optical system is an auto collimator in which both the light source and the photodetector are positioned in the same focal plane of a lens so that a parallel beam of light is produced which is incident upon the plane reflector, returned to the lens and brought to a focus at the photodetector.
References Cited (Backward Citations)
US2517612A
Cited
US3515881A
Cited
US3577205A
Cited
US3536824A
Cited
US3617131A
Cited
US3918814A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-04-30 | 1982-10-30 | 1983-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-30 | 1986-10-30 | 1987-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-30 | 1990-10-30 | 1991-05-01 | $7700.00 | Window Closed / Lapsed |