| Abstract : | VBT is a 2.34m equatorial telescope. It is a classical-design telescope with primary parabolic and secondary hyperbolic profiles. Three spectroscopic instruments are used with VBT - Optical Medium Resolution (OMR) spectrograph, Echelle high-resolution spectrograph, and SILFID low-resolution spectrograph. The High-resolution Echelle spectrograph is coupled from the prime focus of VBT, while the other two are coupled from the Cassegrain focus. Presently, spectroscopic observations are carried out with one instrument at a time. To optimize the usage of VBT light, we devised a method to utilize the half-degree field of view of VBT and all three spectrographs simultaneously. We present here the concept of optimization and preliminary design of the wide field, its supporting system, and the concept of optimization of VBT for effective utilization of observation hours that can accommodate multiple spectrographs to use simultaneously. |
