Realizing large-area diffractive lens using multiple subaperture diffractive lenses and computational reconstruction

Shivasubramanian Gopinath; Agnes Pristy Ignatius Xavier; Praveen Periyasamy Angamuthu; Tauno Kahro; Oskar Tamm; Andrei Bleahu; Francis Gracy Arockiaraj; Daniel Smith; Soon Hock Ng; Saulius Juodkazis; Kaupo Kukli; Aile Tamm; Vijayakumar Anand

doi:10.1117/12.2665675

31 May 2023 Realizing large-area diffractive lens using multiple subaperture diffractive lenses and computational reconstruction

Shivasubramanian Gopinath, Agnes Pristy Ignatius Xavier, Praveen Periyasamy Angamuthu, Tauno Kahro, Oskar Tamm, Andrei Bleahu, Francis Gracy Arockiaraj, Daniel Smith, Soon Hock Ng, Saulius Juodkazis, Kaupo Kukli, Aile Tamm, Vijayakumar Anand

Author Affiliations +

Proceedings Volume 12574, Holography: Advances and Modern Trends VIII; 125740O (2023) https://doi.org/10.1117/12.2665675
Event: SPIE Optics + Optoelectronics, 2023, Prague, Czech Republic

Abstract

Manufacturing large area diffractive lenses (DLs) is a challenging task, as in many cases, the outermost zone width surpasses the photolithography limit and even the wavelength limit. In this study, a computational imaging method is proposed which allows realizing a single large area strong DL with multiple sub-aperture weak DLs. The sub-aperture DLs collect light and focus it into multiple points within the area of the image sensor instead of a single point which increases the width of the zones of the DL. A computational reconstruction method was applied to reconstruct a high-resolution image from the multiple low-resolution images.

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Shivasubramanian Gopinath, Agnes Pristy Ignatius Xavier, Praveen Periyasamy Angamuthu, Tauno Kahro, Oskar Tamm, Andrei Bleahu, Francis Gracy Arockiaraj, Daniel Smith, Soon Hock Ng, Saulius Juodkazis, Kaupo Kukli, Aile Tamm, and Vijayakumar Anand "Realizing large-area diffractive lens using multiple subaperture diffractive lenses and computational reconstruction", Proc. SPIE 12574, Holography: Advances and Modern Trends VIII, 125740O (31 May 2023); https://doi.org/10.1117/12.2665675

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