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, all spherical 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.
@article{arxiv.1810.03621,
title = {DOTIFS: spectrograph optical and opto-mechanical design},
author = {Haeun Chung and A. N. Ramaprakash and Pravin Khodade and Deepa Modi and Chaitanya V. Rajarshi and Sabyasachi Chattopadhyay and Pravin A. Chordia and Vishal Joshi and Sungwook E. Hong and Amitesh Omar and Swara Ravindranath and Yong-Sun Park and Changbom Park},
journal= {arXiv preprint arXiv:1810.03621},
year = {2018}
}
Comments
14 pages, 10 figures, Conference poster at SPIE Astronomical Telescopes + Instrumentation, 2018, Austin, Texas, United States