DOTIFS: fore-optics and calibration unit design

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 deliver...

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Bibliographic Details
Published in:arXiv.org 2018-10
Main Authors: Chung, Haeun, Ramaprakash, A N, Khodade, Pravin, Rajarshi, Chaitanya V, Chattopadhyay, Sabyasachi, Chordia, Pravin A, Omar, Amitesh, Park, Changbom
Format: Article
Language:English
Subjects:
Arc lamps
Calibration
Focal plane
Integrals
Krypton
Mercury (metal)
Neon
Optics
Subsystems
Xenon
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Summary: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.
ISSN:2331-8422
DOI:10.48550/arxiv.1810.03627