Manzanares Ituarte, AnaCalvo Padilla, María LuisaChevalier Del Río, MargaritaLakshminarayanan, Vasudevan2023-06-202023-06-201997-07-01Manzanares Ituarte, A., Calvo Padilla, M. L., Chevalier Del Río, M. & Lakshminarayanan, V. «Line Spread Function Formulation Proposed by W H Steel: A Revision». Applied Optics, vol. 36, n.o 19, julio de 1997, p. 4362. DOI.org (Crossref), https://doi.org/10.1364/AO.36.004362.0003-693510.1364/AO.36.004362https://hdl.handle.net/20.500.14352/59074© Optical Society of America. The financial support of the Spanish Ministry of Health, the Institute of Health “Carlos III”, and the Health Research Foundation under project 95/1518 is acknowledged. Also a grant (A. Manzanares) from the Complutense University (4829) is acknowledged.A revised formulation of the image Light distribution of an incoherent line source proposed by Steel [Rev. Opt. 31, 334-340 (1952)] is presented. Analytical and numerical results based on this new representation are given. We explicitly show that a major error in Steel's final expression generates singularities, thereby preventing convenient numerical computation.engjournal articlehttp://doi.org/10.1364/AO.36.004362http://www.opticsinfobase.orgopen access535OpticsÓptica (Física)2209.19 Óptica Física