Share Email Print
cover

Proceedings Paper

Axicon focusing in oblique illumination
Author(s): Anna Thaning; Zbigniew Jaroszewicz; Ari T. Friberg
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

In perpendicular illumination, axicons give a focal line of large depth of focus and narrow, well-known transverse width. In oblique illumination, however, the focal line is broadened and its shape changed. In this contribution, we use the method of stationary phase to characterize the focal segments for oblique illumination in a compact form, which both yields the width of the focus and reveals it to be asteroid-shaped. These results are compared to those for a diffractive axicon of elliptically shaped phase-step pattern, which are found to be slightly squeezed asteroids. It is shown that the changes in the focus are caused by off-axis astigmatism for oblique illumination, and by on-axis astigmatism for the elliptic axicon.

Paper Details

Date Published: 19 November 2003
PDF: 2 pages
Proc. SPIE 4829, 19th Congress of the International Commission for Optics: Optics for the Quality of Life, (19 November 2003); doi: 10.1117/12.524141
Show Author Affiliations
Anna Thaning, Royal Institute of Technology (Sweden)
Zbigniew Jaroszewicz, Institute of Applied Optics (Poland)
Ari T. Friberg, Royal Institute of Technology (Sweden)


Published in SPIE Proceedings Vol. 4829:
19th Congress of the International Commission for Optics: Optics for the Quality of Life
Giancarlo C. Righini; Anna Consortini, Editor(s)

© SPIE. Terms of Use
Back to Top