System for locating a body in motion

• US 4,710,028 A
• Filed: 06/02/1986
• Issued: 12/01/1987
• Est. Priority Date: 06/17/1985
• Status: Expired due to Term

• Current Assignee: Aerospatiale Societe Nationale Industrielle
• Original Assignee: Aerospatiale Societe Nationale Industrielle
• Inventors: Grenier, Gilles, Merle, Jean-Pierre, Maffert, Jerome, des Ordons, Jacques R.
• Primary Examiner(s): Evans, F. L.
• Application Number:
  US06/869,302
• Time in Patent Office: 547 Days
• Field of Search: 356/141, 356/152, 356/375, 356/373
• US Class Current: 356/620
• CPC Class Codes: F41G 7/303 Sighting or tracking devices especially provided for simultaneous observation of the target and of the missile
• CPC Class Codes: G01S 3/784 using a mosaic of detectors

Abstract

This invention relates to a system for locating a body in motion with respect to an axis, comprising an optical detector disposed in fixed manner and cooperating with an optical emitter connected to said body in motion, system wherein said optical detector comprises a fixed matrix of controllable photosensitive elements; said optical emitter produces flash signals; and synchronization means are provided for said electronic control means to deliver control pulses synchronized with said flash signals and triggering off the taking of an image. The invention is more particularly applicable to the location and guiding of missiles.

Claims

1. A tracking device for locating a flying body, such as a missile, within the line of sight of said tracking device, said tracking device comprising:

a fixed planar matrix of controllable photosensitive elements, the plane of which is at least substantially at right angles with said line of sight;

electronic means for controlling said photosensitive elements;

an optical system for forming an optical image of said flying body onto said fixed planar matrix;

an optical emitter producing flash signals being carried by said flying body and synchronization means being provided for said electronic control means to deliver control pulses triggering off the taking of images synchronized with said flash signals.

2. The tracking device of claim 1,

wherein said control pulses cover temporally the whole of said flash signals.

3. The tracking device of claim 1,

wherein, with each control pulse there is associated an additional, temporally close control pulse produced outside of any flash signal, and

means are provided for comparing the electric signals furnished by said matrix during a control pulse and during the additional control pulse associated therewith.

4. The tracking device of claim 1,

wherein said photosensitive elements are of the charge transfer type.

5. The tracking device of claim 1,

wherein synchronization between said optical emitter and said optical detector is obtained by a permanent link.

6. The tracking device of claim 1,

wherein synchronization between said optical emitter and said optical detector is obtained by temporary link means and means are provided for maintaining said synchronization after rupture of said temporary link.

7. The tracking device of claim 1,

wherein the flash signals are periodical.

8. The tracking device of claim 1,

wherein the flash signals appear at pseudo-random instants.