The new ground-based optical telescopes

Details The new ground-based optical telescopes The new ground-based optical telescopes

Mar 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991pht....44c..22m&link_type=abstract

Physics Today (ISSN 0031-9228), vol. 44, March 1991, p. 22-30.

Physics

Optics

4

Astronomical Observatories, Equipment Specifications, Infrared Astronomy, Mirrors, Telescopes, Adaptive Optics, Honeycomb Structures, Systems Engineering, Very Large Array (Vla)

Scientific paper

The next round of advancements in ground-based astronomical telescopes' resolution and sensitivity can only be made via larger telescopes of arrays of telescopes; efforts are underway in Europe, Japan, and the U.S. to quadruple light-collecting area and achieve an order-of-magnitude increase in the production rate of new collecting area sensor technologies, relative to performance typical of the last two decades. Three distinct primary mirror designs are being developed toward these ends: (1) honeycomb-structure mirrors incorporating active glass-temperature control; (2) thin-meniscus zero-expansion material mirrors with actively controlled support; and (3) mirror mosaics with servocontrolled alignment systems, exemplified by the Keck telescope's mosaic of 36 1.8-m segments.

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