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Temporal phase evaluation by Fourier analysis of fringe patterns with spatial carrier



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Quiroga Mellado, Juan Antonio and Gómez Pedrero, José Antonio (2001) Temporal phase evaluation by Fourier analysis of fringe patterns with spatial carrier. Journal of Modern Optics, 48 (14). pp. 2129-2139. ISSN 0950-0340

Official URL: http://dx.doi.org/10.1080/09500340108235503



A new method is presented for the temporal evaluation of fringe patterns with spatial carrier. The proposed technique involves recording the irradiance fluctuations obtained when a linear variation of the set-up sensitivity is introduced. In this condition, the use of a spatial carrier introduces a linear temporal carrier frequency. In this way, Fourier analysis can be performed to obtain the phase and, finally, the quantity to be measured. The optimum conditions for the sensitivity variation have been studied in order to minimize the errors associated with the Fourier analysis. The technique has been applied to measure the distribution of ray deflections on the surface of two ophthalmic lenses using a deflectometric set-up.

Item Type:Article
Additional Information:

© 2001 Taylor and Francis Ltd.

Uncontrolled Keywords:Speckle Interferometry, Shape Measurement, Objects, Camera
Subjects:Sciences > Physics > Optics
ID Code:23141
Deposited On:14 Oct 2013 11:16
Last Modified:14 Oct 2013 11:16

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