31 May 1994 PAMELA: progress report on a 0.5-m-diam telescope with a 36-segment adaptive primary mirror
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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.
© (1994) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Anthony D. Gleckler, Anthony D. Gleckler, Gregory H. Ames, Gregory H. Ames, David J. Markason, David J. Markason, Skip Radau, Skip Radau, Henry B. Waites, Henry B. Waites, } "PAMELA: progress report on a 0.5-m-diam telescope with a 36-segment adaptive primary mirror", Proc. SPIE 2201, Adaptive Optics in Astronomy, (31 May 1994); doi: 10.1117/12.176125; https://doi.org/10.1117/12.176125

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