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Progress in manufacturing the first 8.4 m off-axis segment for the Giant Magellan Telescope

Advanced Optical and Mechanical Technologies in Telescopes and Instrumentation, SPIE 7018 (2008). 2. The GMT. GMT is designed to guarantee smooth wavefront over large subapertures, with minimal reliance on active alignment and phasing.24 m f/0.7 primary mirror consists of seven 8.4 m segments, the

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Progress in manufacturing the first 8.4 m off-axis segment for the Giant Magellan Telescope

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    1. Advanced Optical and Mechanical Technologies in Telescopes and Instrumentation, SPIE 7018 (2008) 1 Buddy Martina, Jim Burgea,b, Brian Cuerdena, Warren Davisona, Jeff Kingsleya, Cary Kittrella, Randy Lutza, Steve Millera, Chunyu Zhaob and Tom Zobristb aSteward Observatory, University of Arizona bCollege of Optical Sciences, University of Arizona Progress in manufacturing the first 8.4 m off-axis segment for the Giant Magellan Telescope

    2. Advanced Optical and Mechanical Technologies in Telescopes and Instrumentation, SPIE 7018 (2008) 2 The GMT GMT is designed to guarantee smooth wavefront over large subapertures, with minimal reliance on active alignment and phasing. 24 m f/0.7 primary mirror consists of seven 8.4 m segments, the largest that can be made. Adaptive Gregorian secondary is segmented to match primary, with 1.1 m segments. Fine alignment, adaptive correction, and phasing are done with small, agile secondary segments. GMT design is simplest way to achieve a coherent wavefront over 24 m aperture.

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