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Proceedings Paper

Wavefront correction system based on an equilateral triangular arrangement of actuators
Author(s): J. Thaddeus Salmon; John W. Bergum; Michael W. Kartz; Robert W. Presta; Charles D. Swift
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Paper Abstract

We are developing an adaptive optics system that is based on an array of actuators arranged with subapertures that are equilateral triangles. The wavefront sensor is a video Hartmann sensor that also uses an equilateral array of lenslets. The controller hardware uses a VME bus. The design minimizes the generation of reflected wavefronts higher than first order across each lenslet for large excursions of actuators from positions where the mirror is flat and, thus maximizes the precision of the slopes measured by the Hartmann sensor. The design is also immune to the waffle mode that is present in the reconstructors of adaptive optics systems where actuators are arranged in a square array.

Paper Details

Date Published: 25 August 1993
PDF: 9 pages
Proc. SPIE 1920, Active and Adaptive Optical Components and Systems II, (25 August 1993); doi: 10.1117/12.152669
Show Author Affiliations
J. Thaddeus Salmon, Lawrence Livermore National Lab. (United States)
John W. Bergum, Lawrence Livermore National Lab. (United States)
Michael W. Kartz, Lawrence Livermore National Lab. (United States)
Robert W. Presta, Lawrence Livermore National Lab. (United States)
Charles D. Swift, Lawrence Livermore National Lab. (United States)


Published in SPIE Proceedings Vol. 1920:
Active and Adaptive Optical Components and Systems II
Mark A. Ealey, Editor(s)

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