148477 20250117162507.0 doi 10.1016/j.optlaseng.2024.108694 sideral 141047 ART-2025-141047 eng Lobera, J. Universidad de Zaragoza (orcid)0000-0001-7930-272X Double spiral phase filter digital in-line holography for particle field recording and tracking 2025 The application of digital in-line holography in fluid velocimetry is mainly limited by the twin image that hinders the particle position and velocity measurements. In this work, we propose the use of two spiral phase filters in a digital in-line holography configuration to discriminate the real and virtual images. The first filter is a physical plate that modifies the object spectrum prior the recording. The second filter is a numerical frequency filter, applied in the reconstruction process, which reshape one of the particle images into a point-like image while blurs its twin image. In this way, particle tracking algorithms, based on the detection of intensity peaks, can easily locate and track particles. The good performance of double spiral phase filter in-line holography for particle field recording and particle tracking has been demonstrated experimentally in the present work. Access copy available to the general public Unrestricted info:eu-repo/grantAgreement/ES/AEI/PID2023-146648NB-C22 info:eu-repo/grantAgreement/ES/DGA-FEDER/E44-23R info:eu-repo/grantAgreement/ES/MICINN/PID2020-113303GB-C22 info:eu-repo/semantics/openAccess by-nc http://creativecommons.org/licenses/by-nc/3.0/es/ info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion López Torres, A. M. Universidad de Zaragoza (orcid)0000-0002-8451-0942 Andrés, N. Universidad de Zaragoza (orcid)0000-0003-2639-3562 Torcal-Milla, F. J. Universidad de Zaragoza (orcid)0000-0003-3178-5253 Roche, E. M. Universidad de Zaragoza (orcid)0000-0003-1183-7052 Palero, V. Universidad de Zaragoza (orcid)0000-0003-1955-6714 2002 385 Universidad de Zaragoza Dpto. Física Aplicada Área Física Aplicada 5008 800 Universidad de Zaragoza Dpto. Ingeniería Electrón.Com. Área Teoría Señal y Comunicac. 184, 2 (2025), 108694 [8 pp.] Opt. lasers eng. Optics and Lasers in Engineering 0143-8166 2971358 http://zaguan.unizar.es/record/148477/files/texto_completo.pdf Versión publicada 2696653 http://zaguan.unizar.es/record/148477/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:148477 articulos driver 2025-01-17-14:36:33 ARTICLE