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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

Chapter:
(p.159) 10 Spatial filtering
Source:
Optics f2f
Author(s):

Charles S. Adams

Ifan G. Hughes

Publisher:
Oxford University Press
DOI:10.1093/oso/9780198786788.003.0010

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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