Proceedings PaperVery high-precision absolute surface metrology gauges for building and qualifying SIM testbed intererometer compound optics
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The Stellar Interferometry Mission (SIM) and particularly one of its testbeds require compound optical pieces the construction and qualification of which, in turn, require very high-precision absolute surface metrology gauges. In this paper, the details of the design, construction and performance of a triplet of interferometers capable of performing the required measurements are presented.