Lakshminarayanan, VasudevanCalvo Padilla, María Luisa2023-06-202023-06-201995-100740-323210.1364/JOSAA.12.002339https://hdl.handle.net/20.500.14352/59081© 1995 Optical Society of America.The spatial impulse response of a single variable-cross-section photoreceptor has been characterized assuming the incoming radiation to be an initial field propagating under confinement conditions inside the receptor. By application of Fourier analysis the total transfer function is determined. Both the outer and the inner segments are characterized as low-pass filters. The dependence of the transfer function on the modal parameter is analyzed.engjournal articlehttp://dx.doi.org/10.1364/JOSAA.12.002339http://www.opticsinfobase.orgopen access535Optical Wave-GuidesInitial FieldEnergy FluxConsequencesFormalismÓptica (Física)2209.19 Óptica Física