Particle tracking from in-line holograms by using single wavelet coefficient

S. Soontaranon; J. Widjaja

doi:10.1117/12.798951

3 April 2008 Particle tracking from in-line holograms by using single wavelet coefficient

S. Soontaranon, J. Widjaja

Proceedings Volume 6793, International Workshop and Conference on Photonics and Nanotechnology 2007; 679305 (2008) https://doi.org/10.1117/12.798951
Event: International Workshop and Conference on Photonics and Nanotechnology 2007, 2007, Pattaya, Thailand

Abstract

We propose a new digital method for tracking position of particles from in-line holograms by using single wavelet coefficient. By computing a wavelet transform of the 1-D intensity profile of a hologram, resultant wavelet coefficients provide space-varying frequency information of an interference pattern. Our study finds that a dilation which is given by the maximum value of the real wavelet coefficient appeared at the center position of the interference pattern is determined by a recording distance and a wavelength of a coherent illuminating light. Therefore, this dilation can be used for extracting the recording distance of particles from the holograms. A feasibility of this method is experimentally verified by analyzing holograms of a line object.

Citation Download Citation

S. Soontaranon and J. Widjaja "Particle tracking from in-line holograms by using single wavelet coefficient", Proc. SPIE 6793, International Workshop and Conference on Photonics and Nanotechnology 2007, 679305 (3 April 2008); https://doi.org/10.1117/12.798951

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