Choice of aperture for large telescopes for optical wavelengths

Details Choice of aperture for large telescopes for optical wavelengths Choice of aperture for large telescopes for optical wavelengths

Aug 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998spie.3352..754a&link_type=abstract

Proc. SPIE Vol. 3352, p. 754-765, Advanced Technology Optical/IR Telescopes VI, Larry M. Stepp; Ed.

Physics

Optics

1

Scientific paper

For a very large telescope for optical and adjacent wavelengths, we have studied a number of parameters that influence choice of aperture size. These are defined by scientific drivers, aspects of segmentation, f-ratio considerations, provisions for interferometry, and structural limitations as well as cost. Alignment systems and adaptive optics operation have been studied. Primary mirror layout and provisions for interferometric operation are commented. Cost estimates have been made based on a number of selected parameters. We conclude that a range of 25 - 50 m seems most interesting for the diameter of the primary mirror. Tentatively, we opt for a 40 m telescope with fully adaptive operation and with optional non-adaptive wide-field operation. The primary mirror is composed of 2 m super-segments, divided into 15 cm adaptive segments.

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