Role of diffraction grating profile in the wavefront sensor based on the Talbot effect

Andrey V. Kovalenko; Myhailo M. Kotov; Vitalij N. Kurashov; Mariya M. Movchan

doi:10.1117/12.2053768

17 December 2013 Role of diffraction grating profile in the wavefront sensor based on the Talbot effect

Andrey V. Kovalenko, Myhailo M. Kotov, Vitalij N. Kurashov, Mariya M. Movchan

Proceedings Volume 9066, Eleventh International Conference on Correlation Optics; 90660R (2013) https://doi.org/10.1117/12.2053768
Event: Eleventh International Conference on Correlation Optics, 2013, Chernivsti, Ukraine

Abstract

When a diffraction grating is illuminated with the plane parallel light beam, its image is self-reproduced at the certain distance. This phenomenon is known as the Talbot effect. A smooth aberration of the incident light beam causes the appropriate deformation of the self-reproduced image, which is characterized with the field of local displacements. These displacements could be used to estimate the local slopes of the distorted wavefront and to restore its shape. In this paper we analyze the limitations of the local slope estimation from the self-reproduced image of the gratings with various amplitude transparency functions (binary with various fill factors, cosine) and discuss on the best choice of the grating profile for the wave-front sensing applications.

Citation Download Citation

Andrey V. Kovalenko, Myhailo M. Kotov, Vitalij N. Kurashov, and Mariya M. Movchan "Role of diffraction grating profile in the wavefront sensor based on the Talbot effect", Proc. SPIE 9066, Eleventh International Conference on Correlation Optics, 90660R (17 December 2013); https://doi.org/10.1117/12.2053768

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