Multi-spectral speckles: theory and applications

Mikael Sjödahl; Emil Hallstig; Davood Khodadad

doi:10.1117/12.981665

25 September 2012 Multi-spectral speckles: theory and applications

Mikael Sjödahl, Emil Hallstig, Davood Khodadad

Proceedings Volume 8413, Speckle 2012: V International Conference on Speckle Metrology; 841306 (2012) https://doi.org/10.1117/12.981665
Event: SPECKLE 2012: V International Conference on Speckle Metrology, 2012, Vigo, Spain

Abstract

The objective of this paper is to discuss the properties and a few applications of multi-spectral speckles. The paper starts with a theoretical section where the correlation properties of multi-spectral speckles are detailed for the case of reflective imaging geometry. Both a free-space geometry and an imaging geometry are detailed. As an application example effects and possibilities provided by the theory in a measurement of surface shape of a generally shaped object from a dual-wavelength holographic recording are detailed. It is showed that the same phase profile is obtained from integration of speckle movements and phase unwrapping and they are therefore exchangeable quantities.

Citation Download Citation

Mikael Sjödahl, Emil Hallstig, and Davood Khodadad "Multi-spectral speckles: theory and applications", Proc. SPIE 8413, Speckle 2012: V International Conference on Speckle Metrology, 841306 (25 September 2012); https://doi.org/10.1117/12.981665

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