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DOTIFS: fore-optics and calibration unit design
Author(s): Haeun Chung; A. N. Ramaprakash; Pravin Khodade; Chaitanya V. Rajarshi; Sabyasachi Chattopadhyay; Pravin A. Chordia; Amitesh Omar; Changbom Park
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Paper Abstract

We present fore-optics and calibration unit design of Devasthal Optical Telescope Integral Field Spectrograph (DOTIFS). DOTIFS fore-optics is designed to modify the focal ratio of the light and to match its plate scale to the physical size of Integral Field Units (IFUs). The fore-optics also delivers a telecentric beam to the IFUs on the telescope focal plane. There is a calibration unit part of which is combined with the fore-optics to have a light and compact system. We use Xenon-arc lamp as a continuum source and Krypton/Mercury-Neon lamps as wavelength calibration sources. Fore-optics and calibration unit shares two optical lenses to maintain compactness of the overall subsystem. Here we present optical and opto-mechanical design of the calibration unit and fore-optics as well as calibration scheme of DOTIFS.

Paper Details

Date Published: 9 July 2018
PDF: 7 pages
Proc. SPIE 10702, Ground-based and Airborne Instrumentation for Astronomy VII, 107027U (9 July 2018); doi: 10.1117/12.2312394
Show Author Affiliations
Haeun Chung, Seoul National Univ. (Korea, Republic of)
Korea Institute for Advanced Study (Korea, Republic of)
A. N. Ramaprakash, Inter-Univ. Ctr. for Astronomy and Astrophysics (India)
Pravin Khodade, Inter-Univ. Ctr. for Astronomy and Astrophysics (India)
Chaitanya V. Rajarshi, Inter-Univ. Ctr. for Astronomy and Astrophysics (India)
Sabyasachi Chattopadhyay, Inter-Univ. Ctr. for Astronomy and Astrophysics (India)
Pravin A. Chordia, Inter-Univ. Ctr. for Astronomy and Astrophysics (India)
Amitesh Omar, Aryabhatta Research Institute of Observational Sciences (India)
Changbom Park, Korea Institute for Advanced Study (India)


Published in SPIE Proceedings Vol. 10702:
Ground-based and Airborne Instrumentation for Astronomy VII
Christopher J. Evans; Luc Simard; Hideki Takami, Editor(s)

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