Measurement and testing by digital speckle correlation

Ichirou Yamaguchi

doi:10.1117/12.807376

13 October 2008 Measurement and testing by digital speckle correlation

Ichirou Yamaguchi

Proceedings Volume 7129, Seventh International Symposium on Instrumentation and Control Technology: Optoelectronic Technology and Instruments, Control Theory and Automation, and Space Exploration; 71290Z (2008) https://doi.org/10.1117/12.807376
Event: Seventh International Symposium on Instrumentation and Control Technology, 2008, Beijing, China

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.

Citation Download Citation

Ichirou Yamaguchi "Measurement and testing by digital speckle correlation", 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); https://doi.org/10.1117/12.807376

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available