A closer look at dynamic speckles and the use of their fine-structure for object measurements

Steen G. Hanson; Theis F. Q. Iversen; Michael Linde Jakobsen

doi:10.1117/12.870936

13 September 2010 A closer look at dynamic speckles and the use of their fine-structure for object measurements

Steen G. Hanson, Theis F. Q. Iversen, Michael Linde Jakobsen

Proceedings Volume 7387, Speckle 2010: Optical Metrology; 73870W (2010) https://doi.org/10.1117/12.870936
Event: Speckle 2010, 2010, Florianapolis, Brazil

Abstract

The possibility to "dress up" the speckles and thereby providing them with a fine structure will be discussed. As these speckles arise from scattering off solid targets, the dynamics of the speckles and their inherent fine structure might vary, providing information on different aspects of the surface displacement. This is achieved by illuminating the object with structured light, and observing the speckle field as it passes an optical system. In this way, simultaneous measurement of displacement (e.g. 2-D) and rotation can be performed. The application of this concept with a system based on spatial filtering velocimetry and ordinary speckle correlation will be discussed.

Citation Download Citation

Steen G. Hanson, Theis F. Q. Iversen, and Michael Linde Jakobsen "A closer look at dynamic speckles and the use of their fine-structure for object measurements", Proc. SPIE 7387, Speckle 2010: Optical Metrology, 73870W (13 September 2010); https://doi.org/10.1117/12.870936

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