Effect of pupil matching of cold shield on the fringe contrast of long-wave infrared spatial heterodyne spectroscopy
- 8 October 2021
- journal article
- research article
- Published by Optica Publishing Group in Applied Optics
- Vol. 60 (29), 9241-9248
- https://doi.org/10.1364/ao.439482
Abstract
Matching the cold shield with the exit pupil of the fringe-imaging system of long-wave infrared (LWIR) spatial heterodyne spectroscopy (SHS) damages illumination uniformity of the interferogram and affects the fringe contrast, which is a significant parameter for LWIR SHS. The optical models of the fringe-imaging system considering and not considering the pupil matching of the cold shield are built to illustrate the effect on the fringe contrast. Simulations based on the optical design software ASAP are conducted to verify the fringe contrast loss for field-widened LWIR SHS. The result shows that the pupil matching of the cold shield decreases the fringe contrast of LWIR SHS and field-widened LWIR SHS by 0.049% and 0.053%, respectively, and the fringe contrast loss increases with the degree of deviation from the telecentric condition of the fringe-imaging system.Funding Information
- National Natural Science Foundation of China (41005019)
- West Light Foundation of the Chinese Academy of Sciences (XAB 2016A07)
- Natural Science Basic Research Program of Shaanxi Province (2019JQ-931)
- West Light Cross-Disciplinary Innovation team of Chinese Academy of Sciences (E1294301)
This publication has 18 references indexed in Scilit:
- Theory of sixth-order wave aberrationsApplied Optics, 2010
- Spatial heterodyne spectroscopy for long-wave infrared: first measurements of broadband spectraOptical Engineering, 2009
- First results from the Spatial Heterodyne Imager for Mesospheric Radicals (SHIMMER): Diurnal variation of mesospheric hydroxylGeophysical Research Letters, 2008
- IRISHS: the infrared imaging spatial heterodyne spectrometer: a new pushbroom Fourier transform ultraspectral imager with no moving partsPublished by SPIE-Intl Soc Optical Eng ,1999
- Infrared imaging spatial heterodyne spectrometer (IRISHS) experiment effortPublished by SPIE-Intl Soc Optical Eng ,1999
- Field-widened spatial heterodyne spectroscopy: correcting for optical defects and new vacuum ultraviolet performance testsPublished by SPIE-Intl Soc Optical Eng ,1994
- Spatial heterodyne spectroscopy for the exploration of diffuse interstellar emission lines at far-ultraviolet wavelengthsThe Astrophysical Journal, 1992
- Spatial heterodyne spectroscopy: interferometric performance at any wavelength without scanningPublished by SPIE-Intl Soc Optical Eng ,1990
- Relative Illumination CalculationsPublished by SPIE-Intl Soc Optical Eng ,1986
- Optical Design For The InfraredPublished by SPIE-Intl Soc Optical Eng ,1985