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26 November 2012 High-speed zonal wavefront sensing
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High speed wavefront sensing is important in real time profile analysis, analysis of fluid dynamics, ophthalmology and so on. Conventional Shack-Hartmann wavefront sensor uses an array of tiny lenses and a digital camera to record the focal spot array. Thus the frame rate of the sensor depends on the camera. In this paper we present a zonal wavefront sensor where the array of lenses is replaced by an array of gratings followed by a focusing lens. The gratings can be configured to generate just one array of focal spots. This reduction in row of the focal spot array leads to increase in the frame rate of the proposed wavefront sensor.
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Biswajit Pathak, Abhijit Das, and Bosanta R. Boruah "High-speed zonal wavefront sensing", Proc. SPIE 8557, Optical Design and Testing V, 85570A (26 November 2012);

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