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Optical Engineering

Field deployable pushbroom hyperspectral imaging polarimeter
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Paper Abstract

Hyperspectral imaging polarimetry enables both the spectrum and its spectrally resolved state of polarization to be measured. This information is important for identifying material properties for various applications in remote sensing and agricultural monitoring. We describe the design and performance of a ruggedized, field deployable hyperspectral imaging polarimeter, designed for wavelengths spanning the visible to near-infrared (450 to 800 nm). An entrance slit was used to sample the scene in a pushbroom scanning mode across a 30 deg vertical by 110 deg horizontal field-of-view. Furthermore, athermalized achromatic retarders were implemented in a channel spectrum generator to measure the linear Stokes parameters. The mechanical and optical layout of the system and its peripherals, in addition to the results of the sensor’s spectral and polarimetric calibration, are provided. Finally, field measurements are also provided and an error analysis is conducted. With its present calibration, the sensor has an absolute polarimetric error of 2.5% RMS and a relative spectral error of 2.3% RMS.

Paper Details

Date Published: 20 October 2017
PDF: 11 pages
Opt. Eng. 56(10) 103107 doi: 10.1117/1.OE.56.10.103107
Published in: Optical Engineering Volume 56, Issue 10
Show Author Affiliations
Michael W. Kudenov, North Carolina State Univ. (United States)
Mariano E. Lowenstern, North Carolina State Univ. (United States)
Julia M. Craven, Sandia National Labs. (United States)
Charles F. LaCasse, Sandia National Labs. (United States)

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