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A Quantitative Evaluation of Neutron Penumbral Imaging with a Toroidal-Segment Aperture
Yen-Wei CHEN Zensho NAKAO Ikuo NAKAMURA
IEICE TRANSACTIONS on Electronics
Publication Date: 1997/02/25
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Electromagnetic Theory
penumbral imaging, neutron image, toroidal aperture, point spread function isoplanatic, non-isoplanaticity, field of view, spatial resolution,
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A quantitative study is made on performance of neutron penumbral imaging with a toroidal-segment aperture, and it focused on isoplanaticity of aperture point spread function and effect of the non-isoplanaticity on the reconstructed images. The results show that the aperture point spread function is satisfactorily isoplanatic for a small field of view, while for a large field of view the point spread function is not satisfactorily isoplanatic resulting in some distortion in the reconstructed image and reduction of resolution.