RT Journal Article
T1 Fourier series diffractive lens with extended depth of focus
A1 Soria García, Ángela
A1 Sánchez Brea, Luis Miguel
A1 Del Hoyo Muñoz, Jesús
A1 Torcal Milla, Francisco José
A1 Gómez Pedrero, José Antonio
AB Angular diffractive lenses have been proven to achieve a narrow beam waist with a long depth of focus. We generalize these type of lenses by defining the angular distribution of the focal length as a Fourier series. The Fourier coefficients of the lens are optimized, using Particle Swarm Optimization algorithm, to minimize the beam width and increase its uniformity for a given depth of focus. In order to obtain a fast simulation during the optimization process, we used Chirp Z-transform algorithm. Finally, we performed an experimental verification of the results using a Spatial Light Modulator. The Fourier series diffractive lens presents a more uniform and narrower beam than previous angular lenses, in both simulations and experiments. These results may find applications in the design of contact and intraocular lenses with extended depth of focus, laser focusing and imaging systems.
PB Elsevier
SN 0030-3992
YR 2023
FD 2023-04-11
LK https://hdl.handle.net/20.500.14352/73394
UL https://hdl.handle.net/20.500.14352/73394
LA eng
NO Ministerio de Ciencia e Innovación de España
NO Fondos Europeos para el desarrollo regional (FEDER)
DS Docta Complutense
RD 15 dic 2025