On the features of the interference of a set of single charged optical vortices for non-contact surface roughness analysis

Bogdan V. Sokolenko; Natalya V. Shostka; Dmitrii Poletaev

doi:10.1117/12.2580404

8 November 2020 On the features of the interference of a set of single charged optical vortices for non-contact surface roughness analysis

Bogdan V. Sokolenko, Natalya V. Shostka, Dmitrii Poletaev

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Proceedings Volume 11525, SPIE Future Sensing Technologies; 1152529 (2020) https://doi.org/10.1117/12.2580404
Event: SPIE Future Sensing Technologies, 2020, Online Only

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Abstract

In this paper, we present the results of the propagational dynamics of vortex beams array in the scope of their possible applications for non-contact robust and precision optical surface profilometry with nanoscale resolution. The result of coaxial superposition of the reference array with the object array of oppositely charged vortex beams represents a dynamically changing intensity distribution. The nature of this changes, namely, rotational effects of "two-petal” beams, allows to determine directly the phase delay between the beams which is introduced by the test object. We have analyzed the process of creating an array of singular beams and the features of experimental setup for detecting of reflecting and transmitting objects.

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Bogdan V. Sokolenko, Natalya V. Shostka, and Dmitrii Poletaev "On the features of the interference of a set of single charged optical vortices for non-contact surface roughness analysis", Proc. SPIE 11525, SPIE Future Sensing Technologies, 1152529 (8 November 2020); https://doi.org/10.1117/12.2580404

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