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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. 2, Iss. 6 — Jun. 13, 2007

Ultra long high resolution beam by multi-zone rotationally symmetrical complex pupil filter

Yingshun Xu, Janak Singh, Colin J. R. Sheppard, and Nanguang Chen  »View Author Affiliations


Optics Express, Vol. 15, Issue 10, pp. 6409-6413 (2007)
http://dx.doi.org/10.1364/OE.15.006409


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Abstract

An ultra long high resolution beam with extension of depth of focus (DoF) in the axial direction as well as high resolution in the transverse direction has been demonstrated by a seven-zone rotationally symmetrical complex pupil filter imposed at the aperture of a focusing lens. Both amplitude and phase of the transmitted light are modulated in different zones. The scalar diffraction theory is used to optimize the zone parameters. Simulation results show that extended DoF of the beam is increased by 16 times while the spot size at the beam waist is reduced to 0.7 times.

© 2007 Optical Society of America

OCIS Codes
(050.1220) Diffraction and gratings : Apertures
(100.6640) Image processing : Superresolution
(170.5810) Medical optics and biotechnology : Scanning microscopy

ToC Category:
Diffraction and Gratings

History
Original Manuscript: February 26, 2007
Revised Manuscript: April 18, 2007
Manuscript Accepted: May 7, 2007
Published: May 10, 2007

Virtual Issues
Vol. 2, Iss. 6 Virtual Journal for Biomedical Optics

Citation
Yingshun Xu, Janak Singh, Colin J. R. Sheppard, and Nanguang Chen, "Ultra long high resolution beam by multi-zone rotationally symmetrical complex pupil filter," Opt. Express 15, 6409-6413 (2007)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=oe-15-10-6409


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