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arXiv · 1205.1940

Wideband Infrared Spectrometer for Characterization of Transiting Exoplanets with Space Telescopes

Keigo Enya
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Abstract

This paper presents a conceptual design for a spectrometer designed specifically for characterizing transiting exoplanets with space-borne infrared telescopes. The design adopting cross-dispersion is intended to be simple, compact, highly stable, and has capability of simultaneous coverage over a wide wavelength region with high throughput. Typical wavelength coverage and spectral resolving power is 1-13 micron with a spectral resolving power of ~ a few hundred, respectively. The baseline design consists of two detectors, two prisms with a dichroic coating and microstructured grating surfaces, and three mirrors. Moving parts are not adopted. The effect of defocusing is evaluated for the case of a simple shift of the detector, and anisotropic defocusing to maintain the spectral resolving power. Variations in the design and its application to planned missions are also discussed.

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Keigo Enya. 2012-05-09. Wideband Infrared Spectrometer for Characterization of Transiting Exoplanets with Space Telescopes. https://doi.org/10.1117/12.925597

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