Differential Optical Function (DOTE)is an image-based non-iterative technique for measuring the complex pupil field.The technique relies on the difference between two PST images when a small modification is introduced the pupils edge.The nature of the modification is of minor importance and can consist of a transmission blockage or a phase shift introduced bv poking a single DM actuator.Even without calibration,dOTE yields an accurate estimate of the complex amplitude over the pupil plane.We experimentally evaluate the technique in several different optical systems,using both transmission and phase modificatioms to the pupil,and different modificantion areas and poke depths.
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