Wideband infrared spectrometer for characterization of transiting exoplanets with space telescopes

K. Enya

doi:10.1117/12.925597

21 September 2012 Wideband infrared spectrometer for characterization of transiting exoplanets with space telescopes

K. Enya

Proceedings Volume 8442, Space Telescopes and Instrumentation 2012: Optical, Infrared, and Millimeter Wave; 84423Y (2012) https://doi.org/10.1117/12.925597
Event: SPIE Astronomical Telescopes + Instrumentation, 2012, Amsterdam, Netherlands

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 1-13µm 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.

Citation Download Citation

K. Enya "Wideband infrared spectrometer for characterization of transiting exoplanets with space telescopes", Proc. SPIE 8442, Space Telescopes and Instrumentation 2012: Optical, Infrared, and Millimeter Wave, 84423Y (21 September 2012); https://doi.org/10.1117/12.925597

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