How do phase-shifting algorithms work?
Por:
Juarez-Salazar R., Mendoza-Rodriguez C., Hernandez-Beltran J.E., Robledo-Sanchez C.
Publicada:
1 ene 2018
Categoría:
Physics and astronomy (miscellaneous)
Resumen:
Interference is an important phenomenon that plays a key role in understanding the properties of light. However, novice students have difficulties with optical interference experiments because fringe-pattern processing algorithms are not a topic of optics courses. The difficulty increases taking into account that the phase shift is usually induced manually and advanced phase-shifting algorithms must be applied. In this paper, the fundamental principles behind seven well-established phase-shifting algorithms are presented. First, five basic algorithms are analyzed: the three-, four-, and n-steps as well as two least-squares algorithms. Then, the advanced iterative algorithm and the generalized phase-shifting are studied. The operation of the algorithms is illustrated by a typical experiment on the Michelson interferometer. This work could be useful as an introductory lesson to the optics laboratory. © 2018 European Physical Society.
Filiaciones:
Juarez-Salazar R.:
CONACYT-Instituto Politécnico Nacional, CITEDI, Ave. Instituto Politécnico Nacional 1310, Nueva Tijuana, B.C., 22435, Mexico
Mendoza-Rodriguez C.:
Facultad de Ciencias Físico-Matemáticas, Benemérita Universidad Autónoma de Puebla, Ciudad Universitaria, Apdo. Postal 1152, Puebla, 72000, Mexico
Hernandez-Beltran J.E.:
Instituto Politécnico Nacional, CITEDI, Ave. Instituto Politécnico Nacional 1310, Nueva Tijuana, B.C., 22435, Mexico
Robledo-Sanchez C.:
Facultad de Ciencias Físico-Matemáticas, Benemérita Universidad Autónoma de Puebla, Ciudad Universitaria, Apdo. Postal 1152, Puebla, 72000, Mexico
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