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Optics Letters

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  • Editor: Anthony J. Campillo
  • Vol. 30, Iss. 19 — Oct. 1, 2005
  • pp: 2527–2529

Focusing astigmatic Gaussian beams through optical systems with a high numerical aperture

Ingo Gregor and Jörg Enderlein  »View Author Affiliations


Optics Letters, Vol. 30, Issue 19, pp. 2527-2529 (2005)
http://dx.doi.org/10.1364/OL.30.002527


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Abstract

We theoretically derive the electric field distribution of an astigmatic Gaussian laser beam after it is focused through a high-aperture objective. We show that astigmatism values that are hard to detect in the collimated laser beam can have a large effect after diffraction-limited focusing. Such astigmatic beams may be frequently encountered in fluorescence correlation measurements and in laser-scanning confocal microscopy. We present experimental measurements of the excitation intensity distribution measured by 3D scanning of single fluorescent molecules immobilized on a glass surface.

© 2005 Optical Society of America

OCIS Codes
(050.1960) Diffraction and gratings : Diffraction theory
(180.1790) Microscopy : Confocal microscopy

ToC Category:
Diffraction and Gratings

Citation
Ingo Gregor and Jörg Enderlein, "Focusing astigmatic Gaussian beams through optical systems with a high numerical aperture," Opt. Lett. 30, 2527-2529 (2005)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-30-19-2527


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References

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