Bibcode
Cobos Duenas, Francisco J.; Gonzalez-Hernandez, Jesus; Tejada, Carlos; Cepa, Jordi; Rasilla, Jose Luis
Referencia bibliográfica
Proc. SPIE Vol. 4008, p. 237-243, Optical and IR Telescope Instrumentation and Detectors, Masanori Iye; Alan F. Moorwood; Eds.
Advertised on:
8
2000
Número de citas
3
Número de citas referidas
1
Descripción
The Optical System for Imaging and low Resolution Integrated
Spectroscopy (OSIRIS) is being designed as a Day-One optical instrument
for the 10.4 mts Gran Telescopio CANARIAS (GTC). It will be the first
instrument, on such a large telescope, belonging to a new class of
tunable spectrographs, implementing last advances in Volume Phase
Holographic Gratings and tunable imaging combined with charge shuffling
capabilities, covering the optical wavelength range. OSIRIS< to be
first mounted dat one of GTC's Nasmyth platforms, is designed to be
compact enough to fit at the Cassegrain focus as well. The optical
design is devised around the classical concept of collimator plus
camera. The collimator is an off axis ellipsoidal mirror, while the
f/2.475 camera consists of several groups of all spherical surfaces
lenses, forming a unit together with the detector rand cryocooler. A
folder mirror prevents interference with the GTC acquisition and guiding
subsystem. Several combinations of color and interference filters. TFs
and VPHs are available in the collimated beam, near the pupil, to
provide the wide versatility of required observing modes and
resolutions. Short descriptions of the OSIRIS geometry, specifications,
design strategy and the optical design are presented.