From Event: SPIE Commercial + Scientific Sensing and Imaging, 2018
A phase-only filter is placed in the pupil plane of an imaging system to engineer a new point spread function with a low peak intensity. Blurred detected images are then reconstructed in post-processing through Wiener Deconvolution. A Differential Evolution algorithm is implemented to optimize these filters for high SNR across the MTF. These filters are tested experimentally using a reflective Spatial Light Modulator (SLM) in the pupil of a system and successfully show the peak intensity reduced 100 times the diffraction limit. Results are compared to expected performance.
Jacob H. Wirth, Abbie T. Watnik, and Grover A. Swartzlander, "Computational imaging for reducing peak irradiance on focal planes," Proc. SPIE 10669, Computational Imaging III, 106690U (Presented at SPIE Commercial + Scientific Sensing and Imaging: April 16, 2018; Published: 12 June 2018); https://doi.org/10.1117/12.2304702.
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