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• W3113014517 abstract "Abstract Partial aperture imaging system (PAIS) is a recently developed concept in which the traditional disc-shaped aperture is replaced by an aperture with a much smaller area and yet its imaging capabilities are comparable to the full aperture systems. Recently PAIS was demonstrated as an indirect incoherent digital three-dimensional imaging technique. Later it was successfully implemented in the study of the synthetic marginal aperture with revolving telescopes (SMART) to provide superresolution with subaperture area that was less than one percent of the area of the full synthetic disc-shaped aperture. In the study of SMART, the concept of PAIS was tested by placing eight coded phase reflectors along the boundary of the full synthetic aperture. In the current study, various improvements of PAIS are tested and its performance is compared with the other equivalent systems. Among the structural changes, we test ring-shaped eight coded phase subapertures with the same area as of the previous circular subapertures, distributed along the boundary of the full disc-shaped aperture. Another change in the current system is the use of coded phase mask with a point response of a sparse dot pattern. The third change is in the reconstruction process in which a nonlinear correlation with optimal parameters is implemented. With the improved image quality, the modified-PAIS can save weight and cost of imaging devices in general and of space telescopes in particular. Experimental results with reflective objects show that the concept of coded aperture extends the limits of classical imaging." @default.
• W3113014517 created "2020-12-21" @default.
• W3113014517 creator A5029506780 @default.
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• W3113014517 date "2020-12-15" @default.
• W3113014517 modified "2023-10-17" @default.
• W3113014517 title "Partial aperture imaging system based on sparse point spread holograms and nonlinear cross-correlations" @default.
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• W3113014517 doi "https://doi.org/10.1038/s41598-020-77912-3" @default.
• W3113014517 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/7738496" @default.
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