期刊
APPLIED OPTICS
卷 50, 期 15, 页码 2283-2293出版社
OPTICAL SOC AMER
DOI: 10.1364/AO.50.002283
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资金
- National Science Foundation (NSF) [ECCS-0955127]
- Directorate For Engineering
- Div Of Electrical, Commun & Cyber Sys [0955127] Funding Source: National Science Foundation
- Grants-in-Aid for Scientific Research [23360176] Funding Source: KAKEN
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. (C) 2011 Optical Society of America
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