In situ optical testing of infrared lenses for high-performance cameras.
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.
Velghe
S
S
Office National d'Etudes et de Recherches Aérospatiales, France. velghe@wanadoo.fr
Haïdar
R
R
Guérineau
N
N
Tauvy
M
M
Rommeluère
S
S
Thétas
S
S
Dunet
G
G
Primot
J
J