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EP0083219A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Image stabilizing in TV systems

Assignee: Honeywell Inc
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Filing: 1982-12-23
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Granted: —
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Expires: 2002-12-23
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Abstract

Abstract An infrared imaging system in a tank comprises mechanical-optical scanning means 12-36 and electronic display means 38,40. Line scan is by a spinning mirror 18, and frame scan by an oscillating mirror 26. To stabilize the image against instability of the mechanical-optical system, gyros measure horizontal and vertical movements, and (1) for vertical movements, the sawtooth drive signal to mirror 26 is adjusted directly to vary its scanning to compensate; (2) for horizontal movements, the line scan sync pulses derived from shaft 22 have their timing adjusted. For this, a phase-locked loop (phase detector, filter, and voltage controlled oscillator) is used, with the correction signal added to the filter output to form the VCO input.

Inventors

  • 👤 Yishay Netzer

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-08 01:10
CPC Classifications
H; H04; H04N; H04N23/00; H04N23/60; H04N23/68; H04N23/682; H04N23/685

Claims Analysis

Total Claims: 7
Claim 1
Independent Claim 102 words
An image scanning and display system comprising mechanical-optical means (12-36) for scanning across a field of view and including a detector (30), scan sync pulse generating means (line 56, from 20), and electronic display means (38,40) fed from the detector (30) and with the scan sync pulse (line 88), and stabilizing means for stabilizing the system against instability of the mechanical-optical means, characterized in that the stabilizing means (Figure 2) comprise movement detecting means (GH, 45) for detecting movement of the optical means in the scan direction (horizontal), and circuitry (50-54, 78) for adjusting the timing of the scan sync pulses accordingly.
Claim 2
Dependent Claim 102 words
An image scanning and display system comprising mechanical-optical means (12-36) for scanning across a field of view and including a detector (30), scan sync pulse generating means (line 56, from 20), and electronic display means (38,40) fed from the detector (30) and with the scan sync pulse (line 88), and stabilizing means for stabilizing the system against instability of the mechanical-optical means, characterized in that the stabilizing means (Figure 2) comprise movement detecting means (GH, 45) for detecting movement of the optical means in the scan direction (horizontal), and circuitry (50-54, 78) for adjusting the timing of the scan sync pulses accordingly.
Claim 3
Dependent Claim 48 words
A system according to Claim 1, characterized in that said circuitry comprises a phase-locked loop comprising a phase detector (50) fed with the incoming sync pulses and a voltage controlled oscillator (54) fed from the phase detector and from the movement detecting means and feeding the phase detector.
Claim 4
Independent Claim 68 words
A system according to either previous Claim, characterized in that the mechanical-optical system also includes transverse scan means (24,26) for scanning transversely to the scan across the field of view, and the stabilizing means includes movement detecting means (GV,41) for detecting movement.,of the optical means in the transverse direction and which produce a correction signal which is used to adjust the drive signal of the transverse scan means.
Claim 5
Independent Claim 18 words
A system according to any previous Claim, characterized in that or each movement detecting means comprises a gyro.
Claim 6
Independent Claim 15 words
A system according to any previous use when mounted on a gun in a tank.
Claim 7
Independent Claim 15 words
A system according to any previous use when mounted on a gun in a tank.

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