NASA NTRS · 20080022256
Laser Metrology Sensing and Control for Large Segmented-Mirror Telescopes
Abstract
Described an optical hexapod metrology concept: a) Can work together with edge sensors; b) Can measure M1 - M2 distance and M1 global curvature. Swept-frequency laser metrology system: a) Absolute optical path length measurement (approx.1 micron); b) Relative optical path length measurement (approx.nm) Air turbulence is a concern for ground-based telescopes and needs further study.
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Zhao, Feng, Rao, Shanti, Ksendzov, Alex, Kadogawa, Hiroshi. 2006-05-30. Laser Metrology Sensing and Control for Large Segmented-Mirror Telescopes. https://ntrs.nasa.gov/citations/20080022256
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