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Calculation of a diffractive lens having a fixed focal position  at several prescribed wavelengths

L.L. Doskolovich1,2, E.A. Bezus1,2, D.A. Bykov1,2, R.V. Skidanov1,2, N.L. Kazanskiy1,2

1 IPSI RAS – Branch of the FSRC “Crystallography and Photonics” RAS,
Molodogvardeyskaya 151, 443001, Samara, Russia,
2 Samara National Research University,
Moskovskoye Shosse 34, 443086, Samara, Russia

 PDF, 1109 kB

DOI: 10.18287/2412-6179-2019-43-6-946-955

Pages: 946-955.

Full text of article: Russian language.

Abstract:
A method for calculating a “spectral” diffractive lens, which ensures the preservation of the focal position at several prescribed wavelengths is proposed. The method is based on minimizing the function characterizing the difference between the complex transmission functions of the spectral lens for given wavelengths and the complex transmission functions of diffraction lenses calculated separately for each of the given wavelengths. As examples, spectral diffractive lenses are calculated for three and seven wavelengths. The simulation results of the calculated lenses confirm good performance of the proposed method.

Keywords:
diffractive optics, diffractive lens, scalar diffraction theory, Fresnel-Kirchhoff integral.

Citation:
Doskolovich LL, Bezus EA, Bykov DA, Skidanov RV, Kazanskiy NL. Calculation of a diffractive lens having a fixed focal position at several prescribed wavelengths. Computer Optics 2019; 43(6): 946-955. DOI: 10.18287/2412-6179-2019-43-6-946-955.

Acknowledgements:
Russian Foundation for Basic Research projects 18-07-00514 and 18-29-03067 (development of the method for calculating spectral diffractive lenses) and Russian Federation Ministry of Science and Higher Education within the state contract with the FSRC “Crystallography and Photonics” RAS under agreement 007-GZ/Ch3363/26 (investigation of the designed spectral diffractive lenses).

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