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Proceedings Paper

15-m laser-stabilized imaging interferometer
Author(s): Robin T. Stebbins; Peter L. Bender; Che Jen Chen; Norman A. Page; David L. Meier; A. K. Dupree
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Paper Abstract

The LAser-Stabilized Imaging Interferometer (LASII) concept is being developed as an astronomical telescope for the next generation of optical resolution beyond Hubble Space Telescope (HST). The essential ingredients are: a rigid and stable structure to minimize mechanical and thermal distortion, active control of the optical geometry by a laser metrology system, a self-deploying structure fitting into a single launch vehicle, and ultraviolet operation. We have modified earlier design concepts to fit the scale of an intermediate sized NASA mission. Our present design calls for 24 0.5 m apertures in a Mills Cross configuration, supported on four trusses. A fifth truss perpendicular to the primary surface would support the secondary mirror and the laser metrology control points. Either separate interferometers or two guide telescopes would track guide stars. This instrument would have about 6 times the resolution of HST in the visible and the same collecting area. The resolution would reach 2.5 mas at 150 nm. The primary trusses would fold along the secondary truss for launch, and automatically deploy on orbit. Possible orbits are sun-synchronous at 900 km altitude, high earth orbit or solar orbit. Infrared capability could be included, if desired.

Paper Details

Date Published: 26 June 1995
PDF: 16 pages
Proc. SPIE 2477, Spaceborne Interferometry II, (26 June 1995); doi: 10.1117/12.213002
Show Author Affiliations
Robin T. Stebbins, Univ. of Colorado/Boulder (United States)
Peter L. Bender, Univ. of Colorado/Boulder (United States)
Che Jen Chen, Jet Propulsion Lab. (United States)
Norman A. Page, Jet Propulsion Lab. (United States)
David L. Meier, Jet Propulsion Lab. (United States)
A. K. Dupree, Harvard-Smithsonian Ctr. for Astrophysics (United States)

Published in SPIE Proceedings Vol. 2477:
Spaceborne Interferometry II
Robert D. Reasenberg, Editor(s)

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