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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, Gregory H. Ames, David J. Markason, Skip Radau, and 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);


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