Light focusing by Fresnel phase plates with an inclined zone profile

Yury E. Geints; Ekaterina K. Panina; Anna V. Afonasenko

doi:10.1117/12.2643368

7 December 2022 Light focusing by Fresnel phase plates with an inclined zone profile

Yury E. Geints, Ekaterina K. Panina, Anna V. Afonasenko

Proceedings Volume 12341, 28th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics; 1234104 (2022) https://doi.org/10.1117/12.2643368
Event: 28th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics, 2022, Tomsk, Russia

Abstract

The results of numerical simulation of optical radiation focusing on a mesowavelength Fresnel phase zone plate (ZP) with zones having an inclined profile are presented. In order to reveal the regularities in the formation of the focal spatial structure, the optical field was calculated in the case of diffraction of a monochromatic optical wave by a single ZP. It is shown that the basic parameters of the focal region (intensity, longitudinal and transverse dimensions, focal distance) are sensitive to the angle of inclination of the annular zones of the ZP. By changing the inclination of the edges, it is possible to optimize focusing and achieve its significant enhancement, which, depending on the focal length of the plate, can be up to 40%.

Citation Download Citation

Yury E. Geints, Ekaterina K. Panina, and Anna V. Afonasenko "Light focusing by Fresnel phase plates with an inclined zone profile", Proc. SPIE 12341, 28th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics, 1234104 (7 December 2022); https://doi.org/10.1117/12.2643368

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