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Creators/Authors contains: "Dorrer, Christophe"

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  1. ; ; ; ; ; (, Optics Letters)
    We report the experimental demonstration of an optical differentiation wavefront sensor (ODWS) based on binary pixelated linear and nonlinear amplitude filtering in the far-field. We trained and tested a convolutional neural network that reconstructs the spatial phase map from nonlinear-filter-based ODWS data for which an analytic reconstruction algorithm is not available. It shows accurate zonal retrieval over different magnitudes of wavefronts and on randomly shaped wavefronts. This work paves the way for the implementation of simultaneously sensitive, high dynamic range, and high-resolution wavefront sensing. 
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  2. ; ; (, Optics Express)
    We report an Optical Differentiation Wavefront Sensor based on a telephoto lens system and binary pixelated filters. It provides a five-fold reduction in the system length compared to a 4fsystem with identical effective focal length. Measurements of phase plates with this system are compared to measurements performed with a commercial low-coherence interferometer. The telephoto-lens-based system can measure wavefronts with accuracy better thanĪ»/10 Root Mean Squared (RMS) atĪ»=633 nm. Experimental investigation shows that the system has a high tolerance to components alignment errors. 
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  3. ; ; (, Optics Express)
  4. ; ; ; ; (, Optics Express)
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