Physics – Optics
Scientific paper
May 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994spie.2201..910g&link_type=abstract
Proc. SPIE Vol. 2201, p. 910-919, Adaptive Optics in Astronomy, Mark A. Ealey; Fritz Merkle; Eds.
Physics
Optics
Scientific paper
The Phased Array Mirror, Extendible Large Aperture telescope has been fully assembled and testing has started. The telescope is the first to have a fully adaptive primary mirror, which consists of 36 hexagonal injection-molded Pyrex segments that are seven centimeters flat-to- flat. The segments are mounted on three long-throw voice-coil actuators for tip, tilt, and piston motion. The segment tiles are measured with a Hartmann-Shack wavefront sensor and the piston errors between adjacent segments are measured via inductive edge-sensors. The personnel at NASA MSFC are performing a significant amount of testing in the area of controls/structure interactions; therefore, in addition to a description of the optical performance and aberration correction capability of the telescope, a description of the plan to model the mechanical structure with emphasis on how this will interact with the adaptive optics system is presented.
Ames Gregory H.
Gleckler Anthony D.
Markason David J.
Radau Skip
Waites Henry B.
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