2026-04-04T01:02:49Zhttps://recercat.cat/oai/request

oai:recercat.cat:2445/242642025-11-19T10:59:56Zcom_2072_1057col_2072_478821col_2072_478917

00925njm 22002777a 4500 dc Pérez Tudela, Julio D. author Juvells Prades, Ignacio author Montes Usategui, Mario author Carnicer González, Arturo author Vallmitjana i Rico, Santiago author 2012-04-20T11:31:23Z 2012-04-20T11:31:23Z 2004 We report the study of the influence of optical aberrations in a joint-transform correlator: The wave aberration of the optical system is computed from data obtained by ray tracing. Three situations are explored: We consider the aberration only in the first diffraction stage (generation of power spectrum), then only in the second (transformation of the power spectrum into correlation), and finally in both stages simultaneously. The results show that the quality of the correlation is determined mostly by the aberrations of the first diffraction stage and that we can optimize the setup by moving the cameras along the optical axis to a suitable position. The good agreement between the predicted data and the experimental results shows that the method explains well the behavior of optical diffraction systems when aberrations are taken into account. Reconeixement òptic de formes Optical pattern recognition Reduction of the effect of aberrations in a joint transform correlator