The optical design of the wide field optical spectrograph for the Thirty Meter Telescope

Details The optical design of the wide field optical spectrograph for the Thirty Meter Telescope The optical design of the wide field optical spectrograph for the Thirty Meter Telescope

Jul 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006spie.6269e..97p&link_type=abstract

Ground-based and Airborne Instrumentation for Astronomy. Edited by McLean, Ian S.; Iye, Masanori. Proceedings of the SPIE, Volu

Astronomy and Astrophysics

Astronomy

1

Scientific paper

WFOS (Wide Field Optical Spectrograph) is a multi-object spectrograph for the TMT (Thirty Meter Telescope) project. A ten month WFOS feasibility study has been undertaken and the resulting optical design is presented. The instrument concept is a multi-barrel approach, comprising four identical instruments placed about the optical axis. A novel off-axis collimator has been utilized with catadioptric cameras. Minimizing fabrication risk has been central to the design, with aspheric surfaces and exotic materials being avoided where possible. The field sizes of the barrels and grating sizes were selected based on optical element manufacturability and dispersion element diffraction efficiency.

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