20 June 2006 Alignment and test of a Constellation-X SXT mirror segment pair
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A single Constellation-X Spectroscopy X-ray Telescope (SXT) mirror segment pair is being aligned in the Optical Alignment Pathfinder 2 (OAP2) platform using a combination of mechanical and optical techniques. Coarse positioning was provided through a contact probe, the alignment was refined in a collimated while-light facility used for the Suzaku (ASTRO-E2) satellite, and then finalized with a combination of a Centroid Detector Assembly (CDA) and an interferometer coupled to a novel conical null lens providing surface map imaging over 60% of the mirror surface at one time. Due to a variety of reasons, the positioning and figure of the mirror segment under examination can shift, and we test how reliably high quality alignment can be reproduced on any given day. Also, the mirror segment's deformation response to deliberate misalignments has been tested, providing a response matrix for these thin glass mirror segments.
© (2006) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Scott M. Owens, Scott M. Owens, Thomas Meagher, Thomas Meagher, Theo Hadjimichael, Theo Hadjimichael, John P. Lehan, John P. Lehan, David A. Content, David A. Content, Timo Saha, Timo Saha, William W. Zhang, William W. Zhang, Rob Petre, Rob Petre, Paul Reid, Paul Reid, William D. Jones, William D. Jones, Stephen O'Dell, Stephen O'Dell, } "Alignment and test of a Constellation-X SXT mirror segment pair", Proc. SPIE 6266, Space Telescopes and Instrumentation II: Ultraviolet to Gamma Ray, 62661W (20 June 2006); doi: 10.1117/12.672663; https://doi.org/10.1117/12.672663

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