Lightweight Tn-Plane Actuated Deformable Mirrors for Space Telescopes (Paperback) (ISBN-13: 9781288332632)

This research focused on lightweight, in-plane actuated, deformable mirrors, with the ultimate goal of developing a 20-meter light gathering aperture for space telescopes. The 0.127 meter diameter deformable mirror small scale testbed was modelled in finite elements using MSC. Nastran software and then used as a basis for a quasi-static controller. Experi- mental tracking of Zernike tip, tilt, and defocus modes was accomplished. The analytical solutions to plate-membrane and beam-string ordinary differential equations were developed. A simplified approach to modelling the axisymmetric cases was also presented. A novel static control strategy, the Modal Transformation Method, was developed to form Zernike surfaces within an interior, or clear aperture, region using a number of statically-actuated Bessel-based vibration modes. The scaling problem for membrane optics is addressed. Significantly, it is shown linear modelling may correctly explain the behavior of small-scale models, but only non-linear models will account for the important terms which govern the full-scale large aperture membrane telescopes.

Author: Michael J. Shepherd
ISBN-10: 1288332637
ISBN-13: 9781288332632
Publisher: Biblioscholar
Language: English
Published: 11/21/2012
Pages: 240
Format: Paperback
Weight: 0.75lbs
Size: 9.21h x 6.14w x 0.51d