Share Email Print
cover

Proceedings Paper

Measurement and testing by digital speckle correlation
Author(s): Ichirou Yamaguchi
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

Uses of digital correlation analysis of speckle intensities are described in measurements and monitoring of rough surfaces. First, theoretical relationships for correlation properties of speckle patterns are surveyed in terms of the intensity cross-correlation between two patterns. They consist of speckle displacement and decorrelation, each of which is related to the position and the reduction of correlation peak, respectively. For examples, speckle displacement is applied to measurement of strain by a laser-speckle strain gauge and a speckle extensometer both of which are perfectly non-contacting. Speckle decorrelation is used for the measurements of surface roughness and monitoring of paint drying process. Relationships with digital holography that enables to derive 3-d speckle cross-correlation are also mentioned.

Paper Details

Date Published: 13 October 2008
PDF: 9 pages
Proc. SPIE 7129, Seventh International Symposium on Instrumentation and Control Technology: Optoelectronic Technology and Instruments, Control Theory and Automation, and Space Exploration, 71290Z (13 October 2008); doi: 10.1117/12.807376
Show Author Affiliations
Ichirou Yamaguchi, Toyo Seiki Seisaku-sho, Ltd. (Japan)
RIKEN (Japan)


Published in SPIE Proceedings Vol. 7129:
Seventh International Symposium on Instrumentation and Control Technology: Optoelectronic Technology and Instruments, Control Theory and Automation, and Space Exploration

© SPIE. Terms of Use
Back to Top