DOTIFS: spectrograph optical and opto-mechanical design

Haeun Chung; A. N. Ramaprakash; Pravin Khodade; Deepa Modi; Chaitanya V. Rajarshi; Sabyasachi Chattopadhyay; Pravin A. Chordia; Vishal Joshi; Sungwook E. Hong; Amitesh Omar; Swara Ravindranath; Yong-Sun Park; Changbom Park

doi:10.1117/12.2311594

8 July 2018 DOTIFS: spectrograph optical and opto-mechanical design

Haeun Chung, A. N. Ramaprakash, Pravin Khodade, Deepa Modi, Chaitanya V. Rajarshi, Sabyasachi Chattopadhyay, Pravin A. Chordia, Vishal Joshi, Sungwook E. Hong, Amitesh Omar, Swara Ravindranath, Yong-Sun Park, Changbom Park

Author Affiliations +

Proceedings Volume 10702, Ground-based and Airborne Instrumentation for Astronomy VII; 107027A (2018) https://doi.org/10.1117/12.2311594
Event: SPIE Astronomical Telescopes + Instrumentation, 2018, Austin, Texas, United States

Abstract

Devasthal Optical Telescope Integral Field Spectrograph (DOTIFS) is a new multi-Integral Field Unit (IFU) instrument, planned to be mounted on the 3.6m Devasthal optical telescope in Nainital, India. It has eight identical, fiber-fed spectrographs to disperse light coming from 16 IFUs. The spectrographs produce 2,304 spectra over a 370-740nm wavelength range simultaneously with a spectral resolution of R=1200-2400. It is composed of all-refractive, allspherical optics designed to achieve on average 26.0% throughput from the telescope to the CCD with the help of high transmission spectrograph optics, volume phase holographic grating, and graded coated e2v 2K by 4K CCD. We present the optical and opto-mechanical design of the spectrograph as well as current development status. Optics and optomechanical components for the spectrographs are being fabricated.

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Haeun Chung, A. N. Ramaprakash, Pravin Khodade, Deepa Modi, Chaitanya V. Rajarshi, Sabyasachi Chattopadhyay, Pravin A. Chordia, Vishal Joshi, Sungwook E. Hong, Amitesh Omar, Swara Ravindranath, Yong-Sun Park, and Changbom Park "DOTIFS: spectrograph optical and opto-mechanical design", Proc. SPIE 10702, Ground-based and Airborne Instrumentation for Astronomy VII, 107027A (8 July 2018); https://doi.org/10.1117/12.2311594

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