公开(公告)号：US20200371018A1

公开(公告)日：2020-11-26

申请号：US16636963

申请日：2018-08-06

Applicant: Elbit Systems Land and C4I Ltd.

Inventor： Ilya LEIZERSON ,  Barak ALFASSI ,  Alon HEIMER ,  Sharone ALONI ,  Adam WOLFF

IPC: G01N21/17 ,  G01H9/00

Abstract: A method and a system for photoacoustic inspection of a part are provided herein. The method may include the following steps: photo-acoustically exciting a predetermined position in a predetermined region on a part by pulsed laser illumination, to yield ultrasonic excitation of the part; coherently illuminating a predetermined location in the predetermined region on the part; detecting an illumination scattered from the predetermined location; determining, based on the scattered illumination, a plurality of sequence of two or more temporally-sequential de-focused speckle pattern images, wherein each of the sequences corresponds to one of the predetermined illuminated locations; and determining a set of translations, each determined based on the sequences, wherein each translation in the set is determined based on two temporally-sequential speckle patterns images in the respective sequence.