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Optics f2fFrom Fourier to Fresnel$
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Charles S. Adams and Ifan G. Hughes

Print publication date: 2018

Print ISBN-13: 9780198786788

Published to Oxford Scholarship Online: January 2019

DOI: 10.1093/oso/9780198786788.001.0001

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Spatial filtering

Spatial filtering

(p.159) 10 Spatial filtering
Optics f2f

Charles S. Adams

Ifan G. Hughes

Oxford University Press

This chapter exploits the Fourier relationship between the fields at different positions for modifying images. Firstly, apodization is considered, where a filter is added in the plane of the lens to modify the spatial distribution in the focal plane. Secondly, spatial filtering is analysed, where a two-lens system is used to allow the manipulation of an image by modifying its Fourier transform.

Keywords:   Apodization, Inverse apodization, Spatial filtering, Phase-contrast imaging, Complementarity

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