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Far-field Diffraction Properties of Annular Walsh Filters
Joint Authors
Mukherjee, Pubali
Hazra, Lakshminarayan
Source
Advances in Optical Technologies
Issue
Vol. 2013, Issue 2013 (31 Dec. 2013), pp.1-6, 6 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2013-07-24
Country of Publication
Egypt
No. of Pages
6
Main Subjects
Engineering Sciences and Information Technology
Abstract EN
Annular Walsh filters are derived from the rotationally symmetric annular Walsh functions which form a complete set of orthogonal functions that take on values either +1 or −1 over the domain specified by the inner and outer radii of the annulus.
The value of any annular Walsh function is taken as zero from the centre of the circular aperture to the inner radius of the annulus.
The three values 0, +1, and −1 in an annular Walsh function can be realized in a corresponding annular Walsh filter by using transmission values of zero amplitude (i.e., an obscuration), unity amplitude and zero phase, and unity amplitude and π phase, respectively.
Not only the order of the Walsh filter but also the size of the inner radius of the annulus provides an additional degree of freedom in tailoring of point spread function by using these filters for pupil plane filtering in imaging systems.
In this report, we present the far-field amplitude characteristics of some of these filters to underscore their potential for effective use in several demanding applications like high-resolution microscopy, optical data storage, microlithography, optical encryption, and optical micromanipulation.
American Psychological Association (APA)
Mukherjee, Pubali& Hazra, Lakshminarayan. 2013. Far-field Diffraction Properties of Annular Walsh Filters. Advances in Optical Technologies،Vol. 2013, no. 2013, pp.1-6.
https://search.emarefa.net/detail/BIM-465806
Modern Language Association (MLA)
Mukherjee, Pubali& Hazra, Lakshminarayan. Far-field Diffraction Properties of Annular Walsh Filters. Advances in Optical Technologies No. 2013 (2013), pp.1-6.
https://search.emarefa.net/detail/BIM-465806
American Medical Association (AMA)
Mukherjee, Pubali& Hazra, Lakshminarayan. Far-field Diffraction Properties of Annular Walsh Filters. Advances in Optical Technologies. 2013. Vol. 2013, no. 2013, pp.1-6.
https://search.emarefa.net/detail/BIM-465806
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-465806