Multiple coherent beam combination systems with reduced number of apertures

Patent metadata

Field	Value
Publication number	US-12411351-B2
Application number	US-202118024988-A
Country	US
Kind code	B2
Filing date	Aug 5, 2021
Priority date	Sep 7, 2020
Publication date	Sep 9, 2025
Grant date	Sep 9, 2025

Abstract

A first transceiver has a beam emitter that generates first coherent beams, and first optics that direct the first coherent beams towards a target and collect radiation reflected from the target. A second transceiver has a beam emitter that generates second coherent beams, a detector, and second optics having an aperture. The second optics directs the second coherent beams towards the target via the aperture, collects radiation reflected from the target via the aperture, and guides a first radiation component of the collected radiation, that corresponds to the first coherent beams, to the detector. The detector generates, from the first radiation component, a signal indicative of an intensity of radiation impinging on the target corresponding to the first coherent beams. A control subsystem is associated with the transceivers and modifies at least one parameter of the first transceiver based on the intensity signal.

First claim

What is claimed is:

1. A system, comprising:
a first transceiver comprising:
a first beam emitting subsystem configured to generate a first plurality of coherent beams,
a first detector to receive radiation, and
a first optical assembly having an aperture and configured to:
direct the first plurality of coherent beams through the aperture towards a target,
collect, via the aperture, radiation reflected from the target, the collected reflected radiation including at least a first component of radiation corresponding to the first plurality of coherent beams and a second component of radiation corresponding to a second plurality of coherent beams impinging on the target, and
guide the second component of radiation to the first detector,

wherein the first detector is configured to generate, from the second component of radiation, a signal indicative of an intensity of radiation impinging on the target corresponding to the second plurality of coherent beams;

a second transceiver comprising:
a second beam emitting subsystem configured to generate the second plurality of coherent beams,
a second detector to receive radiation, and
a second optical assembly having an aperture and configured to:
direct the second plurality of coherent beams through the aperture of the second optical assembly towards the target,
collect, via the aperture of the second optical assembly, radiation reflected from the target, the reflected radiation collected by the second optical assembly including at least a first component of radiation corresponding the first plurality of coherent beams and a second component of radiation corresponding to the second plurality of coherent beams, and
guide the first component of the reflected radiation collected by the second optical assembly to the second detector,

wherein the second detector is configured to generate, from the first component of the reflected radiation collected by the second optical assembly, a signal indicative of an intensity of radiation impinging on the target corresponding to the first plurality of coherent beams; and

a control subsystem associated with the first transceiver and the second transceiver, the control subsystem configured to: modify at least one parameter of the first transceiver based on the signal generated by the second detector, and modify at least one parameter of the second transceiver based on the signal generated by the first detector.

2. The system of claim 1 , wherein the control subsystem modifies the at least one parameter of the first transceiver by actuating the first beam emitting subsystem to adjust a beam parameter of one or more coherent beams of the first plurality of coherent beams based on the signal generated by the second detector, and wherein the control subsystem modifies the at least one parameter of the second transceiver by actuating the second beam emitting subsystem to adjust a beam parameter of one or more coherent beams of the second plurality of coherent beams based on the signal generated by the first detector.

3. The system of claim 1 , wherein the first optical assembly includes a first telescope arrangement for directing the first plurality of coherent beams towards the target and for collecting the reflected radiation from the target, and wherein the second optical assembly includes a second telescope arrangement for directing the second plurality of coherent beams towards the target and for collecting the reflected radiation from the target.

4. The system of claim 3 , wherein the first telescope arrangement has an aperture that defines the aperture of the first optical assembly, and wherein the first telescope arrangement directs the first plurality of coherent beams towards the target and collects the reflected radiation from the target through the aperture of the first telescope arrangement, and wherein the second telescope arrangement has an aperture that defines the aperture of the second optical assembly, and wherein the second telescope arrangement directs the second plurality of coherent beams towards the target and collects the reflected radiation from the target through the aperture of the second telescope arrangement.

5. The system of claim 3 , wherein the first optical assembly further includes a first selective optical element configured to: transmit or reflect radiation emitted by the first beam emitting subsystem to the first telescope arrangement, and reflect or transmit incident radiation received from the first telescope arrangement towards the first detector, and wherein the second optical assembly further includes a second selective optical element configured to: transmit or reflect radiation emitted by the second beam emitting subsystem to the second telescope arrangement, and reflect or transmit incident radiation received from the second telescope arrangement towards the second detector.

6. The system of claim 5 , wherein the first optical assembly further includes a first adaptive optical element deployed between the first selective optical element and the first detector in an optical path from the first telescope arrangement to the first detector, the first adaptive optical element configured to: receive radiation from the first selective optical element, and direct the received radiation to the first detector, and wherein the second optical assembly further includes a second adaptive optical element deployed between the second selective optical element and the second detector in an optical path from the second telescope arrangement to the second detector, the second adaptive optical element configured to: receive radiation from the second selective optical element, and direct the received radiation to the second detector.

7. The system of claim 6 , wherein the first adaptive optical element includes a deformable reflective surface, and wherein the second adaptive optical element includes a deformable reflective surface, and wherein the control subsystem modifies the at least one parameter of the first transceiver by selectively deforming the reflective surface of the first adaptive optical element based on the signal generated by the second detector, and wherein the control subsystem modifies the at least one parameter of the second transceiver by selectively deforming the reflective surface of the second adaptive optical element based on the signal generated by the first detector.

8. The system of claim 1 , wherein the first optical assembly defines a first optical path and a second optical path, and wherein the first plurality of coherent beams propagate from the first beam emitting subsystem to the aperture of the first optical assembly along the first optical path, and wherein the second component of radiation propagates from the aperture of the first optical assembly to the first detector along the second optical path, and wherein the second optical assembly defines a first optical path and a second optical path, and wherein the second plurality of coherent beams propagate from the second beam emitting subsystem to the aperture of the second optical assembly along the first optical path of the second optical assembly, and wherein the first component of the reflected radiation collected by the second optical assembly propagates from the aperture of the second optical assembly to the second detector along the second optical path of the second optical assembly.

9. The system of claim 1 , wherein the radiation from the first plurality of coherent beams is centered around a first wavelength, and wherein the radiation from the second plurality of coherent beams is centered around a second wavelength different from the first wavelength.

10. A method, comprising:
generating a first plurality of coherent beams a

Assignees

• Rafael Advanced Defense Systems Ltd

Inventors

• Golubchik Daniel
• Shwa David

Classifications

• G01S7/497

  Means for monitoring or calibrating · CPC title

• G01S7/4816

  of receivers alone · CPC title

• G01S7/4815

  using multiple transmitters · CPC title

• G01S17/86

  Combinations of lidar systems with systems other than lidar, radar or sonar, e.g. with direction finders · CPC title

• G02B27/1013

  for colour or multispectral image sensors, e.g. splitting an image into monochromatic image components on respective sensors (spectral imaging systems G01J) · CPC title