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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 52, Iss. 36 — Dec. 20, 2013
  • pp: 8634–8643

Polychromatic imaging with extended depth of field using phase masks exhibiting constant phase over broad wavelength band

Shay Elmalem, Naim Konforti, and Emanuel Marom  »View Author Affiliations

Applied Optics, Vol. 52, Issue 36, pp. 8634-8643 (2013)

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A recent publication [Opt. Express 16, 20540–20561 (2008)] presented a way for extending the depth of field (DOF) of imaging systems using a binary phase mask made of annular rings delivering a π-phase shift. Usually, such masks are designed with respect to some central wavelength; they will thus deliver a different phase shift for other wavelengths. This issue is reexamined in this paper, where it is shown that polychromatic masks that deliver the same phase shift over a wide range of wavelengths provide improved imaging over an extended DOF. The simulation results demonstrate the improved performance of imaging systems using such masks.

© 2013 Optical Society of America

OCIS Codes
(050.5080) Diffraction and gratings : Phase shift
(110.0110) Imaging systems : Imaging systems
(110.4850) Imaging systems : Optical transfer functions
(110.7348) Imaging systems : Wavefront encoding

ToC Category:
Imaging Systems

Original Manuscript: August 22, 2013
Revised Manuscript: November 10, 2013
Manuscript Accepted: November 11, 2013
Published: December 11, 2013

Shay Elmalem, Naim Konforti, and Emanuel Marom, "Polychromatic imaging with extended depth of field using phase masks exhibiting constant phase over broad wavelength band," Appl. Opt. 52, 8634-8643 (2013)

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