17 July 2008 ASM: a scaled down Active Segmented Mirror for the Active Phasing Experiment
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The construction of extremely large telescope is only possible with a segmented primary mirror. The phasing of the primary mirror due to its size and its number of segments is a main concern at the European Southern Observatory. The European Southern Observatory has developed a test bench called Active Phasing Experiment to study new phasing technology and new telescope control system. The key subsystem of this experiment is a scaled down Active Segmented Mirror (ASM) composed of sixty-one hexagonal segments of seventeen millimeters side to side. Each hexagonal mirror can all be controlled in piston, tip and tilt. The integration of this jewel piece of opto-mechanic started after the successful results obtained with the manufacturing of a prototype composed of only seven modules.
© (2008) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Christophe Dupuy, Frédéric Gonté, Christoph Frank, "ASM: a scaled down Active Segmented Mirror for the Active Phasing Experiment", Proc. SPIE 7012, Ground-based and Airborne Telescopes II, 70123B (17 July 2008); doi: 10.1117/12.790350; https://doi.org/10.1117/12.790350

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