Wavefront correction system based on an equilateral triangular arrangement of actuators

J. Thaddeus Salmon; John W. Bergum; Michael W. Kartz; Robert W. Presta; Charles D. Swift

doi:10.1117/12.152669

25 August 1993 Wavefront correction system based on an equilateral triangular arrangement of actuators

J. Thaddeus Salmon, John W. Bergum, Michael W. Kartz, Robert W. Presta, Charles D. Swift

Proceedings Volume 1920, Active and Adaptive Optical Components and Systems II; (1993) https://doi.org/10.1117/12.152669
Event: 1993 North American Conference on Smart Structures and Materials, 1993, Albuquerque, NM, United States

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.

Citation Download Citation

J. Thaddeus Salmon, John W. Bergum, Michael W. Kartz, Robert W. Presta, and Charles D. Swift "Wavefront correction system based on an equilateral triangular arrangement of actuators", Proc. SPIE 1920, Active and Adaptive Optical Components and Systems II, (25 August 1993); https://doi.org/10.1117/12.152669

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