We propose to add a specific phase chessboard to the classical Hartmann mask used for wave-front sensing. By doing this we obtain a pseudoguiding of the energy issuing from this mask, allowing for an increase in the sensitivity of the Hartmann test. This property is illustrated by experiment, and a comparison between classical and new Hartmanngrams is presented.
© 2000 Optical Society of America
(010.7350) Atmospheric and oceanic optics : Wave-front sensing
(050.1950) Diffraction and gratings : Diffraction gratings
(070.6760) Fourier optics and signal processing : Talbot and self-imaging effects
(220.4840) Optical design and fabrication : Testing
Jérôme Primot and Nicolas Guérineau, "Extended Hartmann Test Based on the Pseudoguiding Property of a Hartmann Mask Completed by a Phase Chessboard," Appl. Opt. 39, 5715-5720 (2000)