-Instrument Introduction

The use of secondary exposure speckle patterns for testing the in-plane displacement field of object surfaces, as well as the strain, distance, velocity testing derived from it, and the analysis of internal defects and vibrations of objects, are promising application areas for speckle effects.

-Experimental content

1. Shoot free space speckle and imaging speckle patterns to understand the phenomenon and characteristics of laser speckle

2. Master the methods of point by point analysis and full field analysis of measuring object displacement in secondary exposure speckle patterns