Measurement techniques for large aspheric optics - LOFT, Large ...

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The Giant Magellan Telescope • Uses proven mirror technology • Challenges of optical testing has been solved • Primary segment #1 nearing completion • The casting of the second primary mirror segment is currently being planned J. H. Burge University of Arizona 22
<strong>Large</strong> Synoptic Survey Telescope 8.4-m aperture Uses three-mirror design to attain 3.5° field of view 15-sec exposures to survey the sky 30TB of data per night! Plan <strong>for</strong> 2016 operation in Chile J. H. Burge University of Arizona 23
Page 1 and 2: Measurement techniques for large as
Page 3 and 4: The Giant Magellan Telescope Site i
Page 5 and 6: Key optical testing challenges for
Page 7 and 8: Interferometric surface measurement
Page 9 and 10: CGH test of small optics system •
Page 11 and 12: 3.75 m fold sphere • UA produced
Page 13 and 14: Scanning pentaprism test Uses the
Page 15 and 16: Laser Tracker Plus Guide initial fi
Page 17 and 18: Comparison of Laser Tracker with In
Page 19 and 20: Measurement Principle • SCOTS mea
Page 21: SCOTS work underway • Large scale
Page 25 and 26: Null test of M1, M3 Separate interf
Page 27 and 28: TMT optical challenges 3.1-m convex
Page 29 and 30: The European Extremely Large Telesc
Page 31 and 32: E-ELT primary mirror • 42-m f/1 n
Page 33 and 34: CGH Fizeau test for primary mirror
Page 35 and 36: Optical layout for EELT segment tes
Page 37 and 38: Projection marks for aligning test
Page 39 and 40: UA achieved low noise measurements
Page 41 and 42: SOC performance 0.02 0.015 Repeatab
Page 43 and 44: Power (ROC measurement) using spher
Page 45 and 46: Fizeau interferometry for large sec
Page 47 and 48: Data with Coherent Noise
Page 49 and 50: Measurement of large flat mirrors T
Page 51 and 52: UA Fizeau test for TMT tertiary Lay
Page 53: Conclusion • University of Arizon

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