Browse Prior Art Database

Covert beam projector (USH0000299)

IP.com Disclosure Number: IPCOM000000298D
Original Publication Date: 1987-Jul-07
Included in the Prior Art Database: 2008-Mar-31
Document File: 7 page(s) / 752K

Publishing Venue

US Statutory Invention Registration (SIRs)

Related People

The United States of America as represented by the Secretary of the Army: OWNER [+3]

Related Documents

USH000299: PATENT [+6]

Abstract

A method and apparatus for projecting a laser beam for communication or guidance purposes wherein transmitted energy goes directly to a receiver area without requiring services of slewing or tracking devices. The energy is precisely directed from a laser transmitter on a missile toward a receiver at a tracking area. By directing the laser energy from a source on the missile during flight and by performing phase conjugating amplification of this laser energy at a tracking area station, atmospheric distortions are removed from the return energy and beam broadening is limited only to the negligible effects of diffraction broadening of the return energy, with the laser return beam being directed almost exclusively back to the missile.

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United States Patent

USH0000299

Miller, Jr.

July 7, 1987


Covert beam projector

Abstract

A method and apparatus for projecting a laser beam for communication or guidance purposes wherein transmitted energy goes directly to a receiver area without requiring services of slewing or tracking devices. The energy is precisely directed from a laser transmitter on a missile toward a receiver at a tracking area. By directing the laser energy from a source on the missile during flight and by performing phase conjugating amplification of this laser energy at a tracking area station, atmospheric distortions are removed from the return energy and beam broadening is limited only to the negligible effects of diffraction broadening of the return energy, with the laser return beam being directed almost exclusively back to the missile.


Inventors:

Miller, Jr.; Walter E. (Huntsville, AL)

Assignee:

The United States of America as represented by the Secretary of the Army (Washington, DC)

Appl. No.:

06/943,360

Filed:

December 15, 1986


Current U.S. Class:

244/3.13

Current International Class:

F41G 7/26 (20060101); F41G 7/20 (20060101); F41G 007/00 ()


References Cited


U.S. Patent Documents

 

 

 

3782667

January 1974

Miller, Jr. et al.

4003659

January 1977

Conard et al.

4027837

June 1977

Miller, Jr. et al.

4234141

November 1980

Miller, Jr. et al.

4571954

February 1986

Roberts et al.

 

 

 

Other References

V V. Shkunov et al., "Optical Phase Conjugation", Scientific American, D 1985, vol. 253, No. 6, pp. 54-59. .
D. M. Pepper, "Applications of Optical Phase Conjugation", Scientific American, Jan. 1986, vol. 254, No. 1, pp. 74-83..


Primary Examiner: Buczinski; Stephen C.
Assistant Examiner: Wallace; Linda J.
Attorney, Agent or Firm:

Garvin, Jr.; John C. Bush; Freddie M.


Government Interests



DEDICATORY CLAUSE
The invention described herein may be manufactured, used, and licensed by or for the Government for governmental purposes without the payment to me of any royalties thereon.


Claims



I claim:
1. In a missile guidance system wherein a target is tracked by a visual line-of-sight from a tracking station, a method for directing a missile toward a target and comprising the steps of:
visually tracking a target from a target tracking station;
launching a missile toward said target;
directing a beam of laser energy from said missile toward said tracking station;
receiving said beam at said tracking station;
performing phase conjugation on said beam at said tracking station; redirecting the phase conjugated beam back along its initial projecting path;
receiving said redirected beam by said missile; and
generating directional guidance within the missile in response to said received redirected beam.
2. In a missile guidance system wherein a target is tracked from a visual line-of-sight, a method of directing a missile toward a target as set forth in claim 1 and further comprising the steps of:
encoding said phase conjugated beam after the step...