28 July 2014 Design and analysis of a large-diameter precision optical mount for NFIRAOS
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Abstract
This study describes the design evolution, finite element analysis (FEA) and experimental testing completed to develop the large optical mounts for the Near-Field IR Adaptive Optics System (NFIRAOS), the facility Adaptive Optics system for the Thirty Meter Telescope (TMT). The mount design incorporates a unique combination of bonded flexure-based linear actuators and a roller-chain radial support. Extensive FEA was completed to refine the design to ensure the final mount design will meet the required operational performance. Experimental work was conducted to ensure that the suitability of the bonded interface between the optic and the flexures and to verify that the high bond stiffness did not cause fracture of the glass during thermal cycling.
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Joeleff Fitzsimmons, Alexis Hill, "Design and analysis of a large-diameter precision optical mount for NFIRAOS", Proc. SPIE 9147, Ground-based and Airborne Instrumentation for Astronomy V, 91478U (28 July 2014); doi: 10.1117/12.2057213; https://doi.org/10.1117/12.2057213
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