000170279 001__ 170279
000170279 005__ 20260410165451.0
000170279 0247_ $$2doi$$a10.1364/OE.586633
000170279 0248_ $$2sideral$$a148834
000170279 037__ $$aART-2026-148834
000170279 041__ $$aeng
000170279 100__ $$aLasarte, Jorge
000170279 245__ $$aHolographic recording on a curved substrate: investigation of a method to increase the numerical aperture in holographic optical lenses
000170279 260__ $$c2026
000170279 5060_ $$aAccess copy available to the general public$$fUnrestricted
000170279 5203_ $$aThis study investigates methods to enhance the numerical aperture (NA) of holographic optical lenses (HOLs) through innovative holographic recording techniques. The research explores the limits of conventional holographic recording of high NA lenses and presents a novel curved-recording technique with the potential to go beyond these limits. The objective is to obtain high NA HOLs suitable for use with LED sources and other highly-diverging input beams. The work first outlines how the maximum numerical aperture lens achievable through holographic recording is limited by the recording geometry. Next, the effect of curving the substrate during holographic recording, and later returning it to a planar shape for use, is explored in order to demonstrate that this could provide a means of fabricating a higher numerical aperture lens. HOLs are then recorded experimentally, firstly using the standard approach for high NA; the overlap of two beams at a plane photosensitive film with as large a beam aperture as possible, and the focal point as close to the (planar) photopolymer as the geometry will allow. Then, a similar arrangement is used, but with curved photopolymer substrates. Diffraction angles and efficiencies of the resulting holographic lenses are compared with the theoretically predicted Bragg diffraction. HOLs with a 20 mm aperture and focal lengths as short as 12 mm are demonstrated.
000170279 536__ $$9info:eu-repo/grantAgreement/ES/DGA/E44-23R
000170279 540__ $$9info:eu-repo/semantics/openAccess$$aby$$uhttps://creativecommons.org/licenses/by/4.0/deed.es
000170279 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000170279 700__ $$aMurphy, Kevin
000170279 700__ $$aNaydenova, Izabela
000170279 700__ $$0(orcid)0000-0001-9804-990X$$aAtencia, Jesús$$uUniversidad de Zaragoza
000170279 700__ $$0(orcid)0000-0002-3299-253X$$aCollados, Ma Victoria$$uUniversidad de Zaragoza
000170279 700__ $$aMartin, Suzanne
000170279 7102_ $$12002$$2385$$aUniversidad de Zaragoza$$bDpto. Física Aplicada$$cÁrea Física Aplicada
000170279 7102_ $$12002$$2647$$aUniversidad de Zaragoza$$bDpto. Física Aplicada$$cÁrea Óptica
000170279 773__ $$g34, 6 (2026), 10234 [18 pp.]$$pOpt. express$$tOPTICS EXPRESS$$x1094-4087
000170279 8564_ $$s5210137$$uhttps://zaguan.unizar.es/record/170279/files/texto_completo.pdf$$yVersión publicada
000170279 8564_ $$s2418818$$uhttps://zaguan.unizar.es/record/170279/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
000170279 909CO $$ooai:zaguan.unizar.es:170279$$particulos$$pdriver
000170279 951__ $$a2026-04-10-13:45:44
000170279 980__ $$aARTICLE