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Proceedings Paper

Limits on adaptive optics systems for lightweight space telescopes
Author(s): Laura Needels; Bruce Martin Levine; Mark H. Milman
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Paper Abstract

Future space telescopes seek to maximize collecting aperture for increased sensitivity and high spatial resolution yet are limited in mass due to launch weight restrictions. JPL has developed the Controlled Optics Modelling Package (COMP) to easily facilitate analyses of optical systems whose elements are perturbed. Development of the computer tool, IMOS (Integrated Modeling of Advanced Optical Systems) allows modeling of structurally and thermally induced deformations to interact with optical systems. Presented here are analyses on the Segmented Reflector Telescope, (SRT), to estimate and then minimize the effect of anticipated disturbances on the resultant optical performance. Such studies are a needed prerequisite for estimating the requirements for adaptive optics due to structural movements. A simulation study estimates the space-time power spectral density of the residual telescope phases from reaction wheel disturbances. Results show that significant disturbances are concentrated in the first few Zernike polynomials with 87% of all disturbances described by the first 11 terms leaving a 0.35 micrometers rms residual. The time bandwidth of the disturbances is between 20 - 25 Hz which placed the required corrections in the adaptive optics regime.

Paper Details

Date Published: 1 November 1993
PDF: 9 pages
Proc. SPIE 1945, Space Astronomical Telescopes and Instruments II, (1 November 1993); doi: 10.1117/12.158760
Show Author Affiliations
Laura Needels, Jet Propulsion Lab. (United States)
Bruce Martin Levine, Jet Propulsion Lab. (United States)
Mark H. Milman, Jet Propulsion Lab. (United States)

Published in SPIE Proceedings Vol. 1945:
Space Astronomical Telescopes and Instruments II
Pierre Y. Bely; James B. Breckinridge, Editor(s)

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