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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 9 — May. 6, 2013
  • pp: 10511–10525

Wigner function measurement using a lenslet array

Lei Tian, Zhengyun Zhang, Jonathan C. Petruccelli, and George Barbastathis  »View Author Affiliations

Optics Express, Vol. 21, Issue 9, pp. 10511-10525 (2013)

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Geometrical–optical arguments have traditionally been used to explain how a lenslet array measures the distribution of light jointly over space and spatial frequency. Here, we rigorously derive the connection between the intensity measured by a lenslet array and wave–optical representations of such light distributions for partially coherent optical beams by using the Wigner distribution function (WDF). It is shown that the action of the lenslet array is to sample a smoothed version of the beam’s WDF (SWDF). We consider the effect of lenslet geometry and coherence properties of the beam on this measurement, and we derive an expression for cross–talk between lenslets that corrupts the measurement. Conditions for a high fidelity measurement of the SWDF and the discrepancies between the measured SWDF and the WDF are investigated for a Schell–model beam.

© 2013 OSA

OCIS Codes
(110.4980) Imaging systems : Partial coherence in imaging
(050.5082) Diffraction and gratings : Phase space in wave options

ToC Category:
Imaging Systems

Original Manuscript: March 8, 2013
Revised Manuscript: April 12, 2013
Manuscript Accepted: April 13, 2013
Published: April 23, 2013

Lei Tian, Zhengyun Zhang, Jonathan C. Petruccelli, and George Barbastathis, "Wigner function measurement using a lenslet array," Opt. Express 21, 10511-10525 (2013)

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