Creating a spherical focal spot with spatially modulated radial polarization in 4Pi microscopy
Optics Letters, Vol. 34, Issue 16, pp. 2444-2446 (2009)
http://dx.doi.org/10.1364/OL.34.002444
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Abstract
We propose an approach to obtain a diffraction-limited spherical focal spot in 4Pi microscopy. By combining the dipole antenna radiation pattern and the Richards–Wolf vectorial diffraction method, an input field at a pupil plane of aplanatic objective lenses for generating a spherical spot can be found analytically by solving the inverse problem. The required field at the pupil plane is found to be a radial polarization with spatial amplitude modulation. With spatial phase modulation, two identical spherical spots with diffraction-limited size and variable distance along the optical axis can also be obtained.
© 2009 Optical Society of America
OCIS Codes
(110.2990) Imaging systems : Image formation theory
(140.3300) Lasers and laser optics : Laser beam shaping
(170.4520) Medical optics and biotechnology : Optical confinement and manipulation
(260.5430) Physical optics : Polarization
ToC Category:
Imaging Systems
History
Original Manuscript: June 3, 2009
Manuscript Accepted: July 7, 2009
Published: August 7, 2009
Virtual Issues
Vol. 4, Iss. 10 Virtual Journal for Biomedical Optics
Citation
Weibin Chen and Qiwen Zhan, "Creating a spherical focal spot with spatially modulated radial polarization in 4Pi microscopy," Opt. Lett. 34, 2444-2446 (2009)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-34-16-2444
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