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Extended Hartmann test based on the pseudoguiding property of a Hartmann mask completed by a phase chessboard

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Abstract

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

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