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Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 34, Iss. 8 — Apr. 15, 2009
  • pp: 1171–1173

Design of a complex filter for depth of focus extension

Frédéric Diaz, François Goudail, Brigitte Loiseaux, and Jean-Pierre Huignard  »View Author Affiliations


Optics Letters, Vol. 34, Issue 8, pp. 1171-1173 (2009)
http://dx.doi.org/10.1364/OL.34.001171


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Abstract

Different methods such as axilens and binary-phase filter have been investigated to improve the depth of focus. A method is proposed to calculate an amplitude–phase pupil filter and obtain the desired distribution of intensity along the optical axis. It produces a narrow spot with a uniform intensity level over a large depth of focus, comparable to the performance obtainable with binary-phase filters. This filter is of particular interest for applications where very low intensity fluctuations along the focus range are required.

© 2009 Optical Society of America

OCIS Codes
(070.2580) Fourier optics and signal processing : Paraxial wave optics
(090.1760) Holography : Computer holography
(100.1390) Image processing : Binary phase-only filters

ToC Category:
Holography

History
Original Manuscript: October 23, 2008
Revised Manuscript: February 10, 2009
Manuscript Accepted: March 5, 2009
Published: April 7, 2009

Citation
Frédéric Diaz, François Goudail, Brigitte Loiseaux, and Jean-Pierre Huignard, "Design of a complex filter for depth of focus extension," Opt. Lett. 34, 1171-1173 (2009)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-34-8-1171


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