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Systematic design of anastigmatic lens axicon
National University of Ireland, Galway. (Applied Optics)
National University of Ireland, Galway.ORCID iD: 0000-0003-3804-0561
National university of Ireland, Galway. (Applied Optics)
2007 (English)In: Applied Optics, ISSN 0003-6935, E-ISSN 1539-4522, Vol. 46, no 24, 6076-6080 p.Article in journal (Refereed) Published
Abstract [en]

We present an analytical method for systematic optical design of a double-pass axicon that shows almost no astigmatism in oblique illumination compared to a conventional linear axicon. The anastigmatic axicon is a singlet lens with nearly concentric spherical surfaces applied in double pass, making it possible to form a long narrow focal line of uniform width. The front and the back surfaces have reflective coatings in the central and annular zones, respectively, to provide the double pass. Our design method finds the radii of curvatures and axial thickness of the lens for a given angle between the exiting rays and the optical axis. It also finds the optimal position of the reflecting zones for minimal vignetting. This method is based on ray tracing of the real rays at the marginal heights of the aperture and therefore is superior to any paraxial method. We illustrate the efficiency of the method by designing a test axicon with optical parameters used for a prototype axicon, which was manufactured and experimentally tested. We compare the optical characteristics of our test axicon with those of the experimental prototype.

Place, publisher, year, edition, pages
Optical Society of America , 2007. Vol. 46, no 24, 6076-6080 p.
Keyword [en]
lens design, geometrical optics, axicon
National Category
Atom and Molecular Physics and Optics
URN: urn:nbn:se:kth:diva-61836DOI: 10.1364/AO.46.006076ISI: 000249452800005OAI: diva2:479729
QC 20120120Available from: 2012-01-18 Created: 2012-01-18 Last updated: 2012-01-20Bibliographically approved

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Burvall, Anna
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