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Diffractive axicons in oblique illumination: analysis and experiments and comparison with elliptical axicons
KTH, Superseded Departments, Microelectronics and Information Technology, IMIT.
2003 (English)In: Applied Optics, ISSN 1559-128X, E-ISSN 2155-3165, Vol. 42, no 1, 9-17 p.Article in journal (Refereed) Published
Abstract [en]

Axicons in oblique illumination produce broadened focal lines, a problem, e.g., in scanning applications. A compact mathematical description of the focal segment is presented, for the first time, to our knowledge, and the results are compared with elliptical axicons in normal illumination. In both cases, analytical expressions in the form of asteroid curves are obtained from asymptotic wave theory and caustic surfaces. The results are confirmed by direct diffraction simulations and by experiments. In addition we show that at a fixed angle an elliptical axicon can be used to compensate for the adverse effects of oblique illumination.

Place, publisher, year, edition, pages
2003. Vol. 42, no 1, 9-17 p.
Keyword [en]
computer-generated holograms, nondiffracting beams, triangulation, system, range, depth
Identifiers
URN: urn:nbn:se:kth:diva-22151ISI: 000180170200001OAI: oai:DiVA.org:kth-22151DiVA: diva2:340849
Note
QC 20100525Available from: 2010-08-10 Created: 2010-08-10 Last updated: 2017-12-12Bibliographically approved

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