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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics

| EXPLORING THE INTERFACE OF LIGHT AND BIOMEDICINE

  • Editor: Gregory W. Faris
  • Vol. 1, Iss. 6 — Jun. 13, 2006

Increasing the lateral resolution of 4Pi fluorescence microscopes

Nicolas Sandeau and Hugues Giovannini  »View Author Affiliations


JOSA A, Vol. 23, Issue 5, pp. 1089-1095 (2006)
http://dx.doi.org/10.1364/JOSAA.23.001089


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Abstract

The axial resolution of fluorescence microscopes can be considerably improved by superposing two illumination beams and by adding coherently the two wavefronts emitted by the luminescent sample. This solution has been implemented in 4Pi microscopes. Theoretical and experimental results have shown that a considerable improvement of the axial resolution can be obtained with these microscopes. However, the lateral resolution remains limited by diffraction. We propose a configuration of a 4Pi microscope in which the lateral displacement of the source modifies the collection efficiency function (CEF). Numerical calculations based on an approximate scalar theory and on exact vector-wave-optics results of the field distribution of the electromagnetic field in image space show that the lateral extent of the CEF can be reduced by a factor greater than 2 with respect to the diffraction limit. We show that, with this solution, the resolution in the transverse plane of 4Pi type B and 4Pi type C microscopes can be improved significantly.

© 2006 Optical Society of America

OCIS Codes
(180.1790) Microscopy : Confocal microscopy
(180.2520) Microscopy : Fluorescence microscopy
(260.3160) Physical optics : Interference
(300.2530) Spectroscopy : Fluorescence, laser-induced

ToC Category:
Microscopy

History
Original Manuscript: March 11, 2005
Revised Manuscript: August 30, 2005
Manuscript Accepted: November 6, 2005

Virtual Issues
Vol. 1, Iss. 6 Virtual Journal for Biomedical Optics

Citation
Nicolas Sandeau and Hugues Giovannini, "Increasing the lateral resolution of 4Pi fluorescence microscopes," J. Opt. Soc. Am. A 23, 1089-1095 (2006)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=josaa-23-5-1089


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References

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