Phase error in Fourier transform spectrometers employing polarization interferometers

Yifan Wang; Michael W. Kudenov; Julia Craven-Jones

doi:10.1117/12.2051037

21 May 2014 Phase error in Fourier transform spectrometers employing polarization interferometers

Yifan Wang, Michael W. Kudenov, Julia Craven-Jones

Proceedings Volume 9099, Polarization: Measurement, Analysis, and Remote Sensing XI; 90990K (2014) https://doi.org/10.1117/12.2051037
Event: SPIE Sensing Technology + Applications, 2014, Baltimore, MD, United States

Abstract

Phase error is common in reflective interferometers, such as the Michelson. This yields highly asymmetric interferograms that complicate the post-processing of single-sided interference data. Common methods of compensating for phase errors include the Mertz, Forman, and Cannes phase correction techniques. However, birefringent interferometers often have highly symmetric interferograms; thus, compensating for phase errors may represent an unnecessary and/or detrimental step in post processing. In this paper, an analysis of the phase error generated by the Infrared Hyperspectral Imaging Polarimeter (IHIP) is conducted. First, a model of the IHIP is presented that quantifies the phase error in the system. The error associated with calculating spectra from single-sided interferograms, using Mertz phase correction and simple singlesided to double-sided mirroring, is then investigated and compared to "true" double-sided Cannes phase corrected spectra. These error calculations are set within the context of measurements taken from a Michelson interferometer-based Fourier transform spectrometer. Results demonstrate that the phase error of the IHIP is comparatively small and that Mertz phase correction may not be necessary to minimize error in the spectral calculation.

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Yifan Wang, Michael W. Kudenov, and Julia Craven-Jones "Phase error in Fourier transform spectrometers employing polarization interferometers", Proc. SPIE 9099, Polarization: Measurement, Analysis, and Remote Sensing XI, 90990K (21 May 2014); https://doi.org/10.1117/12.2051037

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KEYWORDS

Interferometers

Fourier transforms

Spectrometers

Prisms

Bismuth

Error analysis

Objectives

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