RT Journal Article
T1 Sector-based Fresnel zone plate with extended depth of focus
A1 Torcal Milla, Francisco José
A1 Sánchez Brea, Luis Miguel
A1 Gómez Pedrero, José Antonio
AB A Sector-based Fresnel zone plate consists of a binary diffractive lens composed of a mosaic of sectors of Fresnel zone plates with different focal distances. When these focal distances are linearly distributed within the sectors, dual focus is obtained. Besides, we explore the possibility to generate an extended depth-of-focus lens by using a cubic distribution of the focal distances assigned to the sectors and optimizing the weight factors given to the terms of the cubic polynomial. Finally, numerical simulations based on the Rayleigh-Sommerfeld approach are carried out and experimental verifications by using a Spatial Light Modulator are performed, showing high agreement. The proposed kind of zone plate has potential applications in different research fields such as microscopy, lithography, data storage, or imaging.
PB Elsevier
SN 0030-3992
YR 2022
FD 2022-05-24
LK https://hdl.handle.net/20.500.14352/71684
UL https://hdl.handle.net/20.500.14352/71684
LA eng
NO © 2022 The Authors.This work has been funded by project Retos Colaboración 2019 “Teluro” RTC2019-007113–3 of the Ministerio de Economía y Competitividad and the European Union, European funds for regional development and by project Gobierno de Aragón-Fondo Social Europeo (Grupo de Tecnología Óptica Láser— E44_20R), and European Fund for Regional Development (EFRD-FEDER, EU) and the Spanish Government’s Agencia Estatal de Investigación (AEI) through the grant DPI2016-75272-R.
NO Ministerio de Ciencia e Innovación (MICINN)/FEDER
NO Gobierno de Aragon-Fondo Social Europeo
DS Docta Complutense
RD 4 may 2024