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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 50, Iss. 15 — May. 20, 2011
  • pp: 2283–2293

White-light channeled imaging polarimeter using broadband polarization gratings

Michael W. Kudenov, Michael J. Escuti, Eustace L. Dereniak, and Kazuhiko Oka  »View Author Affiliations

Applied Optics, Vol. 50, Issue 15, pp. 2283-2293 (2011)

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A white-light snapshot channeled linear imaging (CLI) polarimeter is demonstrated by utilizing polarization gratings (PGs). The CLI polarimeter is capable of measuring the two-dimensional distribution of the linear Stokes polarization parameters by incorporating two identical PGs, in series, along the optical axis. In this configuration, the general optical shearing functionality of a uniaxial crystal-based Savart plate is realized. However, unlike a Savart plate, the diffractive nature of the PGs creates a linear dependence of the shear versus wavelength, thus providing broadband functionality. Consequently, by incorporating the PG-based Savart plate into a Savart plate channeled imaging polarimeter, white-light interference fringes can be generated. This enables polarimetric image data to be acquired at shorter exposure times in daylight conditions, making it more appealing over the quasi-monochromatic channeled imaging polarimeters previously described in the literature. Furthermore, the PG-based device offers significantly more compactness, field of view, optical simplicity, and vibration insensitivity than previously described white-light CLI polarimeters based on Sagnac interferometers. Included in this paper are theoretical descriptions of the linear ( S 0 , S 1 , and S 2 ) and complete ( S 0 , S 1 , S 2 , and S 3 ) channeled Stokes imaging polarimeters. Additionally, descriptions of our calibration procedures and our experimental proof of concept CLI system are provided. These are followed by laboratory and outdoor polarimetric measurements of S 0 , S 1 , and S 2 .

© 2011 Optical Society of America

OCIS Codes
(300.6190) Spectroscopy : Spectrometers
(110.3175) Imaging systems : Interferometric imaging
(110.5405) Imaging systems : Polarimetric imaging

ToC Category:
Imaging Systems

Original Manuscript: November 30, 2010
Revised Manuscript: March 2, 2011
Manuscript Accepted: March 7, 2011
Published: May 18, 2011

Michael W. Kudenov, Michael J. Escuti, Eustace L. Dereniak, and Kazuhiko Oka, "White-light channeled imaging polarimeter using broadband polarization gratings," Appl. Opt. 50, 2283-2293 (2011)

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