公开(公告)号：US10012531B2

公开(公告)日：2018-07-03

申请号：US15298820

申请日：2016-10-20

Applicant: BAE SYSTEMS Information and Electronic Systems Integration Inc.

Inventor： David J. Schorr ,  Will R. Grigsby ,  Somit S. Mathur ,  Bill Alexander

IPC: G01J1/44 ,  G08B21/18 ,  G01J1/02 ,  G01J1/42

CPC classification number: G01J1/0266 ,  G01J1/0295 ,  G01J1/4228 ,  G01J1/4257 ,  G01J1/44 ,  G01J2001/446 ,  G08B21/182

Abstract: Techniques are provided for estimating the direction of a laser source under non-uniform illumination conditions such as laser speckle. An example system may include a detector array comprising sensors configured to detect the amplitude of the received laser signal. The sensors are disposed on the array at unique orientation angles relative to each other. The sensor size is selected based on the speckle pattern of the laser signal such that the sensors are small enough to be uniformly illuminated by the laser signal in the presence of speckle. The system also includes an amplitude ratio calculation circuit configured to calculate ratios of the amplitudes between each of two sensors of one or more pairs of sensors. The system further includes an angle of arrival calculation circuit configured to estimate the direction of the source of the laser signal based on the calculated ratios and the orientation angles of the sensors.

公开(公告)号：US20180113021A1

公开(公告)日：2018-04-26

申请号：US15298820

申请日：2016-10-20

Applicant: BAE SYSTEMS Information and Electronic Systems Integration Inc.

Inventor： David J. Schorr ,  Will R. Grigsby ,  Somit S. Mathur ,  Bill Alexander

IPC: G01J1/02 ,  G01J1/42 ,  G01J1/44 ,  G08B21/18

CPC classification number: G01J1/0266 ,  G01J1/0295 ,  G01J1/4228 ,  G01J1/4257 ,  G01J1/44 ,  G01J2001/446 ,  G08B21/182

Abstract: Techniques are provided for estimating the direction of a laser source under non-uniform illumination conditions such as laser speckle. An example system may include a detector array comprising sensors configured to detect the amplitude of the received laser signal. The sensors are disposed on the array at unique orientation angles relative to each other. The sensor size is selected based on the speckle pattern of the laser signal such that the sensors are small enough to be uniformly illuminated by the laser signal in the presence of speckle. The system also includes an amplitude ratio calculation circuit configured to calculate ratios of the amplitudes between each of two sensors of one or more pairs of sensors. The system further includes an angle of arrival calculation circuit configured to estimate the direction of the source of the laser signal based on the calculated ratios and the orientation angles of the sensors.