Martínez Herrero, RosarioJubells, IgnasiMaluenda, DavidCarnicer, Artur2023-06-172023-06-1720190277-786X10.1117/12.2527391https://hdl.handle.net/20.500.14352/12357Conference on Applicantions of Optics and Photonics (AOP) (4ª. 2019. Lisboa). ISBN:978-1-5106-3164-9. © 2019 SPIE. RR.M.H. and A.C. acknowledges support from Ministerio de Economia y Competitividad (MINECO) grant number FIS2016-75147-C3-1-P.In the present communication, we describe how to produce long light distributions in the focal area of a high numerical aperture optical system using a custom modulation function with spiral charge. This analysis expands our previous developments in the field. We analyze the effect of this new element on the behavior of light along the optical axis.engOn the behavior of vector light needles using modulation functions with topological chargejournal articlehttp://dx.doi.org/10.1117/12.2527391http://www.spiedigitallibrary.orgopen access535PolarizationFieldÓptica (Física)2209.19 Óptica Física