DOTIFS: fore-optics and calibration unit design

Haeun Chung; A. N. Ramaprakash; Pravin Khodade; Chaitanya V. Rajarshi; Sabyasachi Chattopadhyay; Pravin A. Chordia; Amitesh Omar; Changbom Park

doi:10.1117/12.2312394

9 July 2018 DOTIFS: fore-optics and calibration unit design

Haeun Chung, A. N. Ramaprakash, Pravin Khodade, Chaitanya V. Rajarshi, Sabyasachi Chattopadhyay, Pravin A. Chordia, Amitesh Omar, Changbom Park

Author Affiliations +

Proceedings Volume 10702, Ground-based and Airborne Instrumentation for Astronomy VII; 107027U (2018) https://doi.org/10.1117/12.2312394
Event: SPIE Astronomical Telescopes + Instrumentation, 2018, Austin, Texas, United States

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.

Citation Download Citation

Haeun Chung, A. N. Ramaprakash, Pravin Khodade, Chaitanya V. Rajarshi, Sabyasachi Chattopadhyay, Pravin A. Chordia, Amitesh Omar, and Changbom Park "DOTIFS: fore-optics and calibration unit design", Proc. SPIE 10702, Ground-based and Airborne Instrumentation for Astronomy VII, 107027U (9 July 2018); https://doi.org/10.1117/12.2312394

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