title: Primary wavefront aberrations calculation from a defocused image or a Hartmanngram.
abstract: A wavefront aberration can be retrieved from a defocused image or a Hartmanngram by several different methods using diffraction theory and Fourier transforms. In this manuscript, we describe an alternate method for wavefront aberration determination from a defocused image or a Hartmanngram using a geometric l approximation. The main assumption is that the image is defocused, with the observation plane outside the caustic limits. The result will be applied to the retrieval of a wavefront with primary aberrations from a Hartmanngram or defocused image without the need for any transversal aberration integration.
authors.affiliation: Centro de Investigaciones en Optica, A. C., Loma del Bosque 115, León Gto. México 37150. dmalacdo@cio.mx
authors.forename: Daniel
authors.initials: D
authors.lastname: Malacara-Doblado
authors.forename: Zacarias
authors.initials: Z
authors.lastname: Malacara-Hernández
authors.forename: Armando
authors.initials: A
authors.lastname: Gómez-Vieyra