2012
DOI: 10.1364/ao.51.001929
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In-plane effects on segmented-mirror control

Abstract: Extremely large optical telescopes are being designed with primary mirrors composed of hundreds of segments. The "out-of-plane" piston, tip, and tilt degrees of freedom of each segment are actively controlled using feedback from relative height measurements between neighboring segments. The "in-plane" segment translations and clocking (rotation) are not actively controlled; however, in-plane motions affect the active control problem in several important ways, and thus need to be considered. We extend earlier a… Show more

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Cited by 7 publications
(1 citation statement)
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“…The influence of the in-plane motions of the segments (translations and clocking), although important for curved mirrors [21], is not significant for flat mirrors.…”
Section: Control Strategymentioning
confidence: 94%
“…The influence of the in-plane motions of the segments (translations and clocking), although important for curved mirrors [21], is not significant for flat mirrors.…”
Section: Control Strategymentioning
confidence: 94%