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Optics Express

Optics Express

  • Editor: Micha
  • Vol. 13, Iss. 23 — Nov. 14, 2005
  • pp: 9409–9414

Measuring large numerical apertures by imaging the angular distribution of radiation of fluorescing molecules

Luru Dai, Ingo Gregor, Iris von der Hocht, Thomas Ruckstuhl, and Jörg Enderlein  »View Author Affiliations


Optics Express, Vol. 13, Issue 23, pp. 9409-9414 (2005)
http://dx.doi.org/10.1364/OPEX.13.009409


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Abstract

Exact knowledge of the numerical aperture is crucial in many applications using high-aperture objectives such as confocal microscopy, optical trapping, or advanced sub-wavelength imaging methods. We propose and apply a precise and straightforward method for measuring this fundamental parameter of microscope objectives with numerical apertures above unity. Our method exploits the peculiarities of the fluorescence emission of molecules at a glass/air interface.

© 2005 Optical Society of America

OCIS Codes
(110.0180) Imaging systems : Microscopy
(110.1220) Imaging systems : Apertures
(170.1790) Medical optics and biotechnology : Confocal microscopy

ToC Category:
Research Papers

History
Original Manuscript: September 7, 2005
Revised Manuscript: October 31, 2005
Published: November 14, 2005

Citation
Luru Dai, Ingo Gregor, Iris von der Hocht, Thomas Ruckstuhl, and Jörg Enderlein, "Measuring large numerical apertures by imaging the angular distribution of radiation of fluorescing molecules," Opt. Express 13, 9409-9414 (2005)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-13-23-9409


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