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Article

Design of Cascaded DOEs for Focusing Different Wavelengths to Different Points

by
Leonid L. Doskolovich
1,2,*,
Daniil V. Soshnikov
1,2,
Georgy A. Motz
1,2,
Egor V. Byzov
1,2,
Evgeni A. Bezus
1,2,
Dmitry A. Bykov
1,2 and
Nikolay L. Kazanskiy
1,2
1
Image Processing Systems Institute, National Research Centre ‘‘Kurchatov Institute’’, 151 Molodogvardeyskaya St., 443001 Samara, Russia
2
Samara National Research University, 34 Moskovskoye Shosse, 443086 Samara, Russia
*
Author to whom correspondence should be addressed.
Photonics 2024, 11(9), 791; https://doi.org/10.3390/photonics11090791 (registering DOI)
Submission received: 22 July 2024 / Revised: 14 August 2024 / Accepted: 22 August 2024 / Published: 23 August 2024
(This article belongs to the Special Issue Recent Advances in Diffractive Optics)

Abstract

We propose a task-specific method for calculating cascaded phase diffractive optical elements (DOEs) for focusing Q incident beams with different wavelengths to Q given points. Due to the utilization of a special optimization criterion, the proposed method makes it possible to calculate the elements of the cascaded DOE in a sequential way. In addition, the calculation of the diffractive microrelief of each DOE in the cascade is reduced to solving a set of independent and computationally simple “pointwise” optimization problems. Using the proposed method, cascades of two DOEs were designed to focus radiation of 11 different wavelengths to 11 different points. The presented numerical simulation results demonstrate good performance of the method. The chosen operating wavelengths correspond to a set of widely used vegetation indices enabling monitoring the vegetation status conditions and tracking the environmental stresses. This makes the obtained results promising for the application in remote sensing and smart agriculture.
Keywords: diffractive optical element; cascaded DOE; scalar diffraction theory; optimization; multispectral diffractive lens; design method diffractive optical element; cascaded DOE; scalar diffraction theory; optimization; multispectral diffractive lens; design method

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MDPI and ACS Style

Doskolovich, L.L.; Soshnikov, D.V.; Motz, G.A.; Byzov, E.V.; Bezus, E.A.; Bykov, D.A.; Kazanskiy, N.L. Design of Cascaded DOEs for Focusing Different Wavelengths to Different Points. Photonics 2024, 11, 791. https://doi.org/10.3390/photonics11090791

AMA Style

Doskolovich LL, Soshnikov DV, Motz GA, Byzov EV, Bezus EA, Bykov DA, Kazanskiy NL. Design of Cascaded DOEs for Focusing Different Wavelengths to Different Points. Photonics. 2024; 11(9):791. https://doi.org/10.3390/photonics11090791

Chicago/Turabian Style

Doskolovich, Leonid L., Daniil V. Soshnikov, Georgy A. Motz, Egor V. Byzov, Evgeni A. Bezus, Dmitry A. Bykov, and Nikolay L. Kazanskiy. 2024. "Design of Cascaded DOEs for Focusing Different Wavelengths to Different Points" Photonics 11, no. 9: 791. https://doi.org/10.3390/photonics11090791

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