Partial aperture imaging system based on sparse point spread holograms and nonlinear cross-correlations

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 indirec...

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Autores principales:	Angika Bulbul, Joseph Rosen
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2020
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/3f43f79bd1fd46cbb08a1e102e03cfdf
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spelling	oai:doaj.org-article:3f43f79bd1fd46cbb08a1e102e03cfdf2021-12-02T12:03:15ZPartial aperture imaging system based on sparse point spread holograms and nonlinear cross-correlations10.1038/s41598-020-77912-32045-2322https://doaj.org/article/3f43f79bd1fd46cbb08a1e102e03cfdf2020-12-01T00:00:00Zhttps://doi.org/10.1038/s41598-020-77912-3https://doaj.org/toc/2045-2322Abstract 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.Angika BulbulJoseph RosenNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 10, Iss 1, Pp 1-12 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Angika Bulbul Joseph Rosen Partial aperture imaging system based on sparse point spread holograms and nonlinear cross-correlations
description	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.
format	article
author	Angika Bulbul Joseph Rosen
author_facet	Angika Bulbul Joseph Rosen
author_sort	Angika Bulbul
title	Partial aperture imaging system based on sparse point spread holograms and nonlinear cross-correlations
title_short	Partial aperture imaging system based on sparse point spread holograms and nonlinear cross-correlations
title_full	Partial aperture imaging system based on sparse point spread holograms and nonlinear cross-correlations
title_fullStr	Partial aperture imaging system based on sparse point spread holograms and nonlinear cross-correlations
title_full_unstemmed	Partial aperture imaging system based on sparse point spread holograms and nonlinear cross-correlations
title_sort	partial aperture imaging system based on sparse point spread holograms and nonlinear cross-correlations
publisher	Nature Portfolio
publishDate	2020
url	https://doaj.org/article/3f43f79bd1fd46cbb08a1e102e03cfdf
work_keys_str_mv	AT angikabulbul partialapertureimagingsystembasedonsparsepointspreadhologramsandnonlinearcrosscorrelations AT josephrosen partialapertureimagingsystembasedonsparsepointspreadhologramsandnonlinearcrosscorrelations
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Partial aperture imaging system based on sparse point spread holograms and nonlinear cross-correlations

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