Velocity measurement using laser speckle statistics
Abstract
A technique is presented which uses a laser beam to measure both vector components of the transverse velocity of a diffuse target. It is shown that the derivative of the spatiotemporal crosscorrelation function of laser speckle intensity fluctuations, taken with respect to the time delay and evaluated at zero time delay, is directly proportional to the component of target velocity that is parallel to the spatial separation. Experimental results are presented which verify this linearity.
 Publication:

Applied Optics
 Pub Date:
 October 1981
 DOI:
 10.1364/AO.20.003539
 Bibcode:
 1981ApOpt..20.3539C
 Keywords:

 Laser Applications;
 Laser Targets;
 Speckle Patterns;
 Statistical Analysis;
 Velocity Measurement;
 Cross Correlation;
 HeliumNeon Lasers;
 Technology Utilization;
 Time Lag;
 Lasers and Masers;
 LIDAR;
 REMOTE SENSING;
 SPECKLE PHENOMENA;
 VELOCIMETRY