title: In situ optical testing of infrared lenses for high-performance cameras.
abstract: We propose to evaluate infrared lenses with a dedicated analyzer having the same mechanical interface as the usual cameras. The proposed analysis is based on a wavefront measurement and allows a diagnostic of possible internal defects of the analyzed lens. The infrared lens analyzer described is constituted with a quadriwave lateral shearing interferometer and works with a blackbody light. We describe the response of this interferometer and an innovative method to obtain the wavefront under test. We finally present the experimental analysis of long-wavelength infrared lenses and the particular case of a modified lens that generates a large spherical aberration.
authors.affiliation: Office National d'Etudes et de Recherches Aérospatiales, France. velghe@wanadoo.fr
authors.forename: S
authors.initials: S
authors.lastname: Velghe
authors.forename: R
authors.initials: R
authors.lastname: Haïdar
authors.forename: N
authors.initials: N
authors.lastname: Guérineau
authors.forename: M
authors.initials: M
authors.lastname: Tauvy
authors.forename: S
authors.initials: S
authors.lastname: Rommeluère
authors.forename: S
authors.initials: S
authors.lastname: Thétas
authors.forename: G
authors.initials: G
authors.lastname: Dunet
authors.forename: J
authors.initials: J
authors.lastname: Primot