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Proceedings Paper

The optical design of the wide field optical spectrograph for the Thirty Meter Telescope
Author(s): John S. Pazder; Murray Fletcher; Chris Morbey
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Paper Abstract

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.

Paper Details

Date Published: 30 June 2006
PDF: 10 pages
Proc. SPIE 6269, Ground-based and Airborne Instrumentation for Astronomy, 626932 (30 June 2006); doi: 10.1117/12.672729
Show Author Affiliations
John S. Pazder, Herzberg Institute of Astrophysics, National Research Council Canada (Canada)
Murray Fletcher, Herzberg Institute of Astrophysics, National Research Council Canada (Canada)
Chris Morbey, Herzberg Institute of Astrophysics, National Research Council Canada (Canada)


Published in SPIE Proceedings Vol. 6269:
Ground-based and Airborne Instrumentation for Astronomy
Ian S. McLean; Masanori Iye, Editor(s)

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