1. Adaptive Optics for Astronomical Telescopes;Hardy,1998
2. Curvature sensing and compensation: a new concept in adaptive optics
3. Production and use of a lenticular Hartmann screen;Shack,1971
4. Pupil plane wavefront sensing with an oscillating prism
5. Das Phasenkontrastverfahren bei der Mikroskopischen beobachtung;Zernike,1935