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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 33, Iss. 7 — Apr. 1, 2008
  • pp: 681–683

Tighter focusing with a parabolic mirror

J. Stadler, C. Stanciu, C. Stupperich, and A. J. Meixner  »View Author Affiliations


Optics Letters, Vol. 33, Issue 7, pp. 681-683 (2008)
http://dx.doi.org/10.1364/OL.33.000681


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Abstract

We demonstrate experimentally and theoretically that a parabolic mirror (PM) with a high numerical aperture (NA) of 1 focuses a radially polarized laser mode to the smallest diffraction-limited spot at a fixed NA and wavelength, having an area of 0.134 λ 2 . The measurements were performed with a confocal microscope, using the PM as a focusing and collecting element. The results stand in accordance with the theoretical calculations presented by Davidson and Bokor [Opt. Lett. 29, 1318 (2004)] , who predicted a reduction in the total focal spot size of 43% as compared with an aplanatic lens.

© 2008 Optical Society of America

OCIS Codes
(110.0180) Imaging systems : Microscopy
(180.1790) Microscopy : Confocal microscopy
(180.5810) Microscopy : Scanning microscopy
(350.5730) Other areas of optics : Resolution

ToC Category:
Microscopy

History
Original Manuscript: December 11, 2007
Revised Manuscript: February 8, 2008
Manuscript Accepted: February 8, 2008
Published: March 27, 2008

Virtual Issues
Vol. 3, Iss. 5 Virtual Journal for Biomedical Optics

Citation
J. Stadler, C. Stanciu, C. Stupperich, and A. J. Meixner, "Tighter focusing with a parabolic mirror," Opt. Lett. 33, 681-683 (2008)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-33-7-681

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