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Title: Reduction of the effect of aberrations in a joint transform correlator
Author: Pérez Tudela, Julio D.
Juvells Prades, Ignacio
Montes Usategui, Mario
Carnicer González, Arturo
Vallmitjana i Rico, Santiago
Keywords: Reconeixement òptic de formes
Optical pattern recognition
Issue Date: 2004
Publisher: Optical Society of America
Abstract: 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.
Note: Reproducció del document publicat a:
It is part of: Applied Optics, 2004, vol. 33, núm. 4, p. 841-849
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ISSN: 0003-6935
Appears in Collections:Articles publicats en revistes (Física Aplicada)

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