Presentation
3 October 2022 An efficient high-etendue spectrometer
James P. McGuire Jr., Erika T. Hamden
Author Affiliations +
Abstract
Hyperion is a Far-UV (FUV) mission that investigates the birth clouds of stars by probing the nature, extent, and state of H2 at the crucial atomic-to-molecular interstellar medium boundary layer. Hyperion examines the fuel for star formation directly by observing the molecular interface between dense, star-forming clouds, the diffuse interstellar environment, and the stars that arise from these regions. Hyperion observes over the 138.5-161.5 nm spectral range with resolution greater than R==50,000. Mapping faint clouds over large areas of sky requires an efficient, high-etendue spectrometer. Conventional cross-dispersed Echelle spectrometers suffer from low efficiency (due to the need for a cross-disperser) and limited etendue due to the aberration correction. We describe an efficient high-etendue spectrometer approach that uses a single grating and a 64 mega-pixel array. The spectrometer is a compact f/5 Offner derivative with free-form surfaces and a single diffraction grating.
Conference Presentation
© (2022) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
James P. McGuire Jr. and Erika T. Hamden "An efficient high-etendue spectrometer", Proc. SPIE 12235, Imaging Spectrometry XXV: Applications, Sensors, and Processing, 122350A (3 October 2022); https://doi.org/10.1117/12.2646738
Advertisement
Advertisement
KEYWORDS
Spectroscopy

Mirrors

Clouds

Diffraction gratings

Stars

Spectral resolution

Spherical lenses

Back to Top