Experiment with a diffractive lens with a fixed focus position at several given wavelengths
Автор: Skidanov Roman Vasilevich, Doskolovich Leonid Leonidovich, Ganchevskaya Sofiya Vladislavovna, Blank Veronika Alexandrovna, Podlipnov Vladimir Vladimirovich, Kazanskiy Nikolay Lvovich
Журнал: Компьютерная оптика @computer-optics
Рубрика: Дифракционная оптика, оптические технологии
Статья в выпуске: 1 т.44, 2020 года.
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The paper presents results of the experimental investigation of “spectral” diffractive lenses the same focus position for several given wavelengths. Two spectral diffractive lenses designed to focus radiation of three and five specified wavelengths in the visible spectrum were investigated. Using a method of direct laser writing in photoresist with iterative correction of writing parameters, we fabricated a diffractive microrelief of the spectral lenses with the height deviation from the designed relief of less than 30 nm. Using a pinhole located at the focus of the fabricated lenses, we estimated the operation wavelengths. The point spread functions of the spectral lenses at the designed wavelengths were measured with the use of a tunable laser. The imaging properties of the spectral lenses were illustrated by the images of a reference color table.
Spectral diffractive lens, harmonic lens, point spread function, focusing, photoresist direct laser recording method
Короткий адрес: https://sciup.org/140247070
IDR: 140247070 | DOI: 10.18287/2412-6179-CO-646