High-throughput and multislit imaging spectrograph for extended sources

Chakrabarti, Supriya; Jokiaho, Olli-Pekka; Baumgardner, Jeffrey; Cook, Timothy; Martel, Jason; Galand, Marina

doi:doi:10.1117/1.OE.51.1.013003

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Optical Engineering / Volume 51 / Issue 1 / Optical System Design

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High-throughput and multislit imaging spectrograph for extended sources

Opt. Eng. 51, 013003 (Feb 01, 2012); http://dx.doi.org/10.1117/1.OE.51.1.013003

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Abstract

References (14)

Citing Articles (12)

Supriya Chakrabarti, Olli-Pekka Jokiaho, Jeffrey Baumgardner, Timothy Cook, and Jason Martel

Boston University, Center for Space Physics, 725 Commonwealth Avenue Boston, Massachusetts 02215

Marina Galand

Imperial College London, Department of Physics, Prince Consort Road, London SW7 2AZ, United Kingdom

We describe a high-throughput (5×10⁻⁴ cm² sr) imaging spectrograph that uses an echelle grating operating at a high dispersion order (24 to 43) to observe extended sources such as atmospheric airglow and diffuse proton aurora at high spectral resolution (approximately 0.02 nm). Instead of using a traditional single slit, the implementation of the instrument described here uses four (50 μm×25 mm) slits through which the radiation enters the spectrograph. The field of view is selected using appropriate foreoptics: the present implementation is a long, narrow configuration of 0.1×50 deg. By placing interference filters in the beam path, the instrument can simultaneously observe several spectral features located anywhere in the visible band (approximately 300 to 1000 nm) at high resolution. This design allows a single echelle grating and a single detector (a CCD in the present implementation) to view the same scene. The design is flexible; the number of slits and the slit dimensions can be tailored to the trade-offs between resolution, throughput, and number of spectral features depending upon the measurement need. While the implementation described here covers only the visible range, the use of different combinations of detector and filter sets can extend its operation to other wavelength regions.

History

Received Aug 05, 2012
Revised Oct 24, 2012
Published online Feb 01, 2012

Digital Object Identifier

http://dx.doi.org/10.1117/1.OE.51.1.013003

Citation

Supriya Chakrabarti, Olli-Pekka Jokiaho, Jeffrey Baumgardner, Timothy Cook, Jason Martel and Marina Galand, "High-throughput and multislit imaging spectrograph for extended sources", Opt. Eng. 51, 013003 (Feb 01, 2012); http://dx.doi.org/10.1117/1.OE.51.1.013003