22 July 2014 Design development of a deployable tertiary mirror for Keck
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Abstract
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.
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J. X. Prochaska, J. X. Prochaska, J. Cabak, J. Cabak, C. Ratliff, C. Ratliff, S. Adkins, S. Adkins, M. Bolte, M. Bolte, D. Cowley, D. Cowley, H. Epps, H. Epps, J. Nelson, J. Nelson, A. Tripsas, A. Tripsas, A. C. Phillips, A. C. Phillips, W. Deich, W. Deich, M. Peck, M. Peck, } "Design development of a deployable tertiary mirror for Keck", Proc. SPIE 9145, Ground-based and Airborne Telescopes V, 91453X (22 July 2014); doi: 10.1117/12.2055275; https://doi.org/10.1117/12.2055275
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