Measured efficiency of three diffraction grating designs for the Carbon Plume Mapper (CPM) spectrometer

Carey L. Weisberg; Daniel J. Preston; Pantazis Z. Mouroulis; Daniel W. Wilson; David R. Ardila; Sander R. Zandbergen; Christine L. Bradley; Robert O. Green

doi:10.1117/12.2692385

2 November 2023 Measured efficiency of three diffraction grating designs for the Carbon Plume Mapper (CPM) spectrometer

Carey L. Weisberg, Daniel J. Preston, Pantazis Z. Mouroulis, Daniel W. Wilson, David R. Ardila, Sander R. Zandbergen, Christine L. Bradley, Robert O. Green

Author Affiliations +

Proceedings Volume 12688, Imaging Spectrometry XXVI: Applications, Sensors, and Processing; 126880H (2023) https://doi.org/10.1117/12.2692385
Event: SPIE Optical Engineering + Applications, 2023, San Diego, California, United States

Conference Poster

Abstract

The Carbon Plume Mapper (CPM) instrument is a high-fidelity imaging spectrometer developed to pinpoint, quantify, and track methane (CH₄) and carbon dioxide (CO₂) point source emissions. CPM is an optically fast F/1.8 Dyson spectrometer that operates over the spectral range of 400 – 2500 nm with a spectral sampling of 5.0 nm. Three diffraction grating designs were measured in a testbed to provide a reliable prediction of grating performance in a Dyson system to inform CPM grating design. This paper will detail the gratings, testbed design, measurement process, and data used to assess grating efficiency through wavelength (500-1700 nm) of three grating designs, both full aperture and sub-aperture for two field angles, polarized and unpolarized.

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Carey L. Weisberg, Daniel J. Preston, Pantazis Z. Mouroulis, Daniel W. Wilson, David R. Ardila, Sander R. Zandbergen, Christine L. Bradley, and Robert O. Green "Measured efficiency of three diffraction grating designs for the Carbon Plume Mapper (CPM) spectrometer", Proc. SPIE 12688, Imaging Spectrometry XXVI: Applications, Sensors, and Processing, 126880H (2 November 2023); https://doi.org/10.1117/12.2692385

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