Speckle displacement in holographic and speckle metrology

Ichirou Yamaguchi; Koichi Kobayashi

doi:10.1117/12.903611

2 November 2011 Speckle displacement in holographic and speckle metrology

Ichirou Yamaguchi, Koichi Kobayashi

Proceedings Volume 8011, 22nd Congress of the International Commission for Optics: Light for the Development of the World; 80118D (2011) https://doi.org/10.1117/12.903611
Event: International Commission for Optics (ICO 22), 2011, Puebla, Mexico

Abstract

Speckle patterns appearing in laser-illumination of a rough surface show dynamic changes when the surface is deformed or illumination is moved. This change is characterized by correlation functions of speckle intensities before and after the change. After their explicit expressions are introduced, applications for measurement of plant growth and an extensometer are described. Digital holography provides 3-dimensional distributions of the correlation functions from which new developments are opened such as noise suppression and simplification of optical systems.

Citation Download Citation

Ichirou Yamaguchi and Koichi Kobayashi "Speckle displacement in holographic and speckle metrology", Proc. SPIE 8011, 22nd Congress of the International Commission for Optics: Light for the Development of the World, 80118D (2 November 2011); https://doi.org/10.1117/12.903611

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