title: Pupil effect in GRIN material.
abstract: The effect on the transmittance function in gradient-index material due to a circular pupil is studied, and we characterize this material by its effective transmittance function.
authors.affiliation: Universidad de Santiago de Compostela, Departamento de Fisica Fundamental (Optica), Santiago de Compostela, Spain.
authors.forename: C
authors.initials: C
authors.lastname: Gomez-Reino
authors.forename: E
authors.initials: E
authors.lastname: Larrea