Improved side-lobe suppression in asymmetric apodization

G. G. Siu; L. Cheng; D. S. Chiu; K. S. Chan

doi:10.1088/0022-3727/27/3/005

Improved side-lobe suppression in asymmetric apodization

Research output: Journal Publications and Reviews (RGC: 21, 22, 62) › 21_Publication in refereed journal › peer-review

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25 Scopus Citations

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Author(s)

G. G. Siu
L. Cheng
D. S. Chiu
K. S. Chan

Detail(s)

Original language	English
Pages (from-to)	459-463
Journal / Publication	Journal of Physics D: Applied Physics
Volume	27
Issue number	3
Publication status	Published - 14 Mar 1994

Link(s)

DOI	DOI https://doi.org/10.1088/0022-3727/27/3/005 Final Published version
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Link to Scopus	https://www.scopus.com/record/display.uri?eid=2-s2.0-0028401067&origin=recordpage
Permanent Link	https://scholars.cityu.edu.hk/en/publications/publication(ef3f39bd-5522-4e22-a8a7-7e68bc7a9b64).html

Abstract

Asymmetric apodization is achieved by adding edge strips or rings to the diffraction slit or circular aperture. It is shown to be equivalent to the superposition of a diffraction field of the main entrance aperture and an interference field of the two edge strips or rings. For further improvement, apodization efficiency is defined as the ratio of integrals of the irradiance square after and before apodization. New designs are proposed to improve side-lobe suppression. The results after adjusting suitable parameters show that the apodization efficiencies are enhanced. © 1994 IOP Publishing Ltd.