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22 July 2014 Design development of a deployable tertiary mirror for Keck
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The University of California Observatories will design and construct a deployable tertiary mirror (named K1DM3) for the Keck 1 telescope, which will complement technical and scientific advances in the area of time-domain astronomy. The K1DM3 device will enable astronomers to swap between any of the foci on Keck 1 in under 2 minutes, both to monitor varying sources (e.g. stars orbiting the Galactic center) and catch rapidly fading sources (e.g. supernovae, flares, gamma-ray bursts). In this paper, we report on the design development during our in-progress Preliminary Design phase. The design consists of a passive wiffle tree axial support system and a diaphragm lateral support system with a 5 arcminute field-of-view mirror. The mirror assembly is inserted into the light path with an actuation system and it relies on a kinematic mechanism for achieving repeatable, precise positioning. This project, funded by an NSF MRI grant, aspires to complete by the end of 2016.
© (2014) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
J. X. Prochaska, J. Cabak, C. Ratliff, S. Adkins, M. Bolte, D. Cowley, H. Epps, J. Nelson, A. Tripsas, A. C. Phillips, W. Deich, and M. Peck "Design development of a deployable tertiary mirror for Keck", Proc. SPIE 9145, Ground-based and Airborne Telescopes V, 91453X (22 July 2014);

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