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main mirror is the classic example that shows the need for such testing. In this case, a test facility such as LOTIS was not easily available, so the completed optics were not tested as a unit, and instead relied on careful testing of the individual components. Unfortunately, due to a mis-assembled
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Bell, R.M. and Robins, G.C. and Eugeni, C. and Cuzner, G. and
Hutchison, S.B. and Baily, S.H. and Ceurden, B. and Hagen, J. and Kenagy, K. and Martin, H.M. and Tuell, M. and Ward, M. and West, S.C. (July 2008). "LOTIS at completion of Collimator integration".
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mirror was not discovered until the telescope was placed into service. This is exactly the type of problem that LOTIS can detect, since it is designed to test large optical systems as a unit by creating realistic inputs and operating conditions for them.
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for testing large optical components under realistic conditions. LOTIS has large, thermally stabilized
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Hutchison, S.B. and
Cochrane, A. and McCord, S. and Bell, R. (2008).
108:"Updated status and capabilities for the LOTIS 6.5 meter collimator"
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