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Determining magnification of remote objects in imaging and white light speckle photography

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We describe a method of remotely determining the camera magnification in imaging with particular emphasis to white light speckle photography. The image shift provided by a transverse camera movement is related to the magnification factor. We experimentally verify the concept here by direct measurement of the image shift as well as fast Fourier transformation analysis. Mathematical analysis relating image shift to the expected number of fringes in the Fourier transform is also presented.

Keywords: Magnification; fast Fourier transform; image shift; remote objects; white light speckle photography

Document Type: Original Article


Affiliations: 1: Center for Applied Optics, The University of Alabama In Huntsville, Huntsville, Alabama 35899, USA 2: P. O. Box. 26044, Georgia Institute of Technology, Atlanta, Georgia 30332, USA

Publication date: August 1, 2002


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