Beam former having variable delays between LED output signals

• US 4,503,336 A
• Filed: 06/14/1982
• Issued: 03/05/1985
• Est. Priority Date: 06/14/1982
• Status: Expired due to Fees

• Current Assignee: ITEQ Corporation
• Original Assignee: ITEQ Corporation
• Inventors: Hutchin, Richard A., Bradley, William C.
• Primary Examiner(s): Nelms, David C.
• Assistant Examiner(s): Brophy, J. Jon
• Application Number:
  US06/388,010
• Time in Patent Office: 995 Days
• Field of Search: 250/578, 250/231 R, 250/237, 250/227, 73/655, 324/77, 367/129, 367/128, 367/124, 367/64, 343/371, 343/372, 343/375
• US Class Current: 250/208.3
• CPC Class Codes: G10K 11/346 using phase variation

Abstract

A beamformer device for forming at least one beam from the outputs of a sensor array, including: a plurality of radiation sources; means for providing to each radiation source a signal from an associated one of the sensors in the sensor array; a detector array of radiation-sensitive means for providing a series of spaced signals representing radiation incident from each of the radiation sources; and means for varying the delays between the spaced signals for optimizing the response of the device to a signal from a predetermined direction.

Claims

1. A beamformer device for forming at least one beam from the outputs of a sensor array, comprising:

a plurality of radiation sources;

means for providing to each said radiation source a sensor signal from an associated one of the sensors in said sensor array;

a detector array of radiation-sensitive means for providing a series of spaced signals, each spaced signal representing radiation incident from a particular one of said radiation sources; and

means for varying the delays between said spaced signals for optimizing the response of said device to a signal from a predetermined direction.

2. The beamformer device of claim 1 in which said means for varying the delays includes optical means.

3. The beamformer device of claim 1 in which said means for varying the delays includes variable clock means.

4. The beamformer device of claim 1 in which said radiation sources provide visible radiation.

5. The beamformer device of claim 1 in which said radiation sources are LED'"'"'s.

6. The beamformer device of claim 1 in which said radiation-sensitive means includes CCD'"'"'s

7. The beamformer device of claim 2 in which said optical means includes a zoom lens for varying the size of the image of said radiation sources on said detector array.

8. The beamformer device of claim 1 in which said radiation-sensitive means includes a plurality of radiation detectors and a plurality of delay elements, at least one said element for each radiation detector.

9. The beamformer device of claim 1 in which said means for varying the delays includes means for generating a separate bar of radiation for each of said radiation sources and projecting those bars of radiation each superimposed at a unique angle onto said detector array with all of said lines intersecting at a point.

10. The beamformer device of claim 9 in which said detector array of radiation sensitive means includes a plurality of delay elements arranged in a plurality of rows and columns, each row corresponding to a different beam to be formed in optimum response to a signal from a predetermined direction.

11. The beamformer device of claim 1 in which said plurality of radiation sources include a plurality of radiation elements and means for projecting radiation to said detector array.

12. The beamformer device of claim 11 in which said means for projecting includes fiber-optic means.

13. The beamformer device of claim 1 furthur including means for adjusting the intensity of said radiation source outputs to said detector array.

14. The beamformer device of claim 13 in which said means for adjusting includes electronic gain control means.

15. The beamformer device of claim 13 in which said means for adjusting includes transmission filter means.

16. A beamformer device for forming at least one beam from the outputs of a sensor array, comprising:

a plurality of radiation sources;

means for providing to each said radiation source a signal from an associated one of the sensors in said sensor array;

a detector array of radiation-sensitive means for providing a series of spaced signals representing radiation incident from each of said radiation sources; and

optical means responsive to said radiation sources for varying the size of the image of said radiation sources on said detector array for varying the delays between said spaced signals for optimizing the response of said device to a signal from a predetermined direction.

17. A beamformer device for forming at least one beam from the outputs of a sensor array, comprising:

a plurality of radiation sources;

means for providing to each said radiation source a sensor signal from an associated one of the sensors in said sensor array;

a detector array of radiation-sensitive means for providing a series of delayed signals, each delayed signal representing radiation incident from a particular one of said radiation sources; and

clock means for varying the delays between said spaced signals for optimizing the response of said device to a signal from a predetermined direction.

18. A beamformer device for forming a number of beams from the outputs of a sensor array, comprising:

a plurality of radiation sources;

means for providing to each said radiation source a signal from an associated one of the sensors in said sensor array;

a detector array of radiation-sensitive means having a plurality of delay elements arranged in a plurality of rows and columns, each row corresponding to a different beam to be formed in optimum response to a signal from a predetermined direction, for providing a series of spaced signals in each row representing radiation incident from each of said radiation sources; and

optical means for generating a separate bar of radiation for each of said radiation sources and projecting those bars of radiation each at a unique angle of projection onto said detector array with all of said lines intersecting at a point for providing different delays between said spaced signals in each row to optimize the response of said device to a signal from a number of different directions corresponding to the number of rows.