US4005935A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for providing a phase compensated optical beam
Assignee: Raytheon Co
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Filing: 1975-07-31
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Granted: 1977-02-01
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Expires: 1995-07-31
Abstract
Abstract According to one herein disclosed embodiment, an initial uncompensated energy pulse is transmitted towards a remotely located target; a portion of the energy reflected from the target is received, processed so as to be back-scattered from a Brillouin mirror, amplified and then retransmitted along a path coincident with the received path. The backscattered energy from the Brillouin mirror is the complex phase conjugate of the received pulse and consequently the second transmitted pulse is phase encoded such that the effects of phase perturbations encountered along the received path are substantially canceled, and near diffraction-limited convergence of the beam upon the target is obtained.
Inventors
- 👤 Victor Wang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:05
CPC Classifications
G; G01; G01S; G01S17/00; G01S17/66
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
130 words
A system for applying energy to a remotely located target such that the energy beam is compensated for the effects of phase perturbations encountered along the path to the target, said system comprising: first transmission means for transmitting a beam of electromagnetic energy to the target; means for receiving energy which is returned from the target along a given path; optical processing means for backscattering said received energy so as to produce therefrom energy which is the complex phase conjugate of the received energy; and second transmission means for transmitting said complex phase conjugate energy along said given path to the target; whereby said complex phase conjugate energy beam is compensated for the effects of phase perturbations encountered along said given path and is therefore substantially focused at the target.
Claim 2
Independent Claim
130 words
A system for applying energy to a remotely located target such that the energy beam is compensated for the effects of phase perturbations encountered along the path to the target, said system comprising: first transmission means for transmitting a beam of electromagnetic energy to the target; means for receiving energy which is returned from the target along a given path; optical processing means for backscattering said received energy so as to produce therefrom energy which is the complex phase conjugate of the received energy; and second transmission means for transmitting said complex phase conjugate energy along said given path to the target; whereby said complex phase conjugate energy beam is compensated for the effects of phase perturbations encountered along said given path and is therefore substantially focused at the target.
Claim 3
Dependent Claim
23 words
The system of claim 1 wherein said optical processing means comprises a Brillouin mirror disposed so that said received energy is backscattered therefrom.
Claim 4
Dependent Claim
22 words
The system of claim 2 including amplifying means for providing amplification of the energy applied to and backscattered from said Brillouin mirror.
Claim 5
Dependent Claim
23 words
The system of claim 3 including an isolator disposed in the path of the energy applied to and back-scattered from said Brillouin mirror.
Claim 6
Dependent Claim
24 words
The system of claim 3 including a spatial filter diposed in the path of the energy applied to and backscattered from said Brillouin mirror.
Claim 7
Dependent Claim
18 words
The system of claim 1 wherein said first transmission means includes a laser unit adapted for pulsed operation.
Claim 8
Dependent Claim
24 words
The system of claim 6 wherein said first transmission means includes an isolator disposed in the path of the output energy from said laser.
Claim 9
Independent Claim
113 words
A system for applying energy to a remotely located target such that the energy beam is compensated for the effects of phase perturbations encountered along a path to the target, said system comprising; means for receiving energy from the target along a given path; optical processing means for backscattering said received energy so as to produce energy which is the complex phase conjugate of the received energy; and transmission means for transmitting said complex phase conjugate energy along said given path to the target; whereby said transmitted complex phase conjugate energy beam is compensated for the effects of phase perturbations encountered along said given path and is therefore substantially focused at the target.
Claim 10
Independent Claim
113 words
A system for applying energy to a remotely located target such that the energy beam is compensated for the effects of phase perturbations encountered along a path to the target, said system comprising; means for receiving energy from the target along a given path; optical processing means for backscattering said received energy so as to produce energy which is the complex phase conjugate of the received energy; and transmission means for transmitting said complex phase conjugate energy along said given path to the target; whereby said transmitted complex phase conjugate energy beam is compensated for the effects of phase perturbations encountered along said given path and is therefore substantially focused at the target.
Claim 11
Dependent Claim
23 words
The system of claim 8 wherein said optical processing means comprises a Brillouin mirror disposed so that said received energy is backscattered therefrom.
Claim 12
Dependent Claim
22 words
The system of claim 9 including amplifying means for providing amplification of the energy applied to and backscattered from said Brillouin mirror.
Claim 13
Independent Claim
97 words
A method for applying energy to a remotely located target so that the energy beam is compensated for the effects of phase perturbations encountered along a path to the target, said method comprising the steps of: receiving energy from the target along a given path; optically processing said received energy by applying it to a device which backscatters energy which is the complex phase conjugate of the received energy; and transmitting said complex phase conjugate energy along said given path to the target; whereby said transmitted complex phase conjugate energy beam is substantially focused at the target.
Claim 14
Independent Claim
97 words
A method for applying energy to a remotely located target so that the energy beam is compensated for the effects of phase perturbations encountered along a path to the target, said method comprising the steps of: receiving energy from the target along a given path; optically processing said received energy by applying it to a device which backscatters energy which is the complex phase conjugate of the received energy; and transmitting said complex phase conjugate energy along said given path to the target; whereby said transmitted complex phase conjugate energy beam is substantially focused at the target.
Claim 15
Dependent Claim
35 words
The method of claim 11 wherein said optical processing step includes applying said received energy to a Brillouin mirror and said transmitting step includes transmitting the resultant energy which is backscattered from said Brillouin mirror.
Claim 16
Dependent Claim
17 words
The method of claim 11 further comprising the step of initially illuminating said target with electromagnetic energy.
Claim 17
Dependent Claim
20 words
The method of claim 11 further comprising the step of initially illuminating said target with a pulse of optical energy.
References Cited (Backward Citations)
US3733129A
Cited
US3731103A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-02-01 | 1980-08-02 | 1981-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-02-01 | 1984-08-02 | 1985-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-02-01 | 1988-08-02 | 1989-02-01 | $7700.00 | Window Closed / Lapsed |