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LSST secondary mirror system final design

Neill, Douglas
Bogan, G.; Zajac, D.; Araujo, C.; Gressler, W.J.; DeVries, J.; Hileman, E.A.; Lotz, P.J.; Mills, D.; Thomas, S.; Sebring, T.A.; Sebag, J.; Warner, M.; Wiecha, O.
Douglas R. Neill ; Gregory Bogan ; Dale Zajac ; Constanza Araujo ; William J. Gressler, et al. " LSST secondary mirror system final design ", Proc. SPIE 9906, Ground-based and Airborne Telescopes VI, 990667 (July 27, 2016); doi:10.1117/12.2234021; http://dx.doi.org/10.1117/12.2234021
Publication Date: 
Wednesday, July 27, 2016
Type: 
Conference Papers
SPIE
Citable: 
no
SPIE Proceedings
Volume: 
9906
Abstract: 
The Large Synoptic Survey Telescope (LSST) has a 10 degrees square field of view which is achieved through a 3 mirror optical system comprised of an 8.4 meter primary, 3.5 meter secondary (M2) and a 5 meter tertiary mirror. The M2 is a 100mm thick meniscus convex asphere. The mirror surface is actively controlled by 72 axial electromechanical actuators (axial actuators). Transverse support is provided by 6 active tangential electromechanical actuators (tangent links). The final design has been completed by Harris Corporation. They are also providing the fabrication, integration and testing of the mirror cell assembly, as well as the figuring of the mirror. The final optical surface will be produced by ion figuring. All the actuators will experience 1 year of simulated life testing to ensure that they can withstand the rigorous demands produced by the LSST survey mission. Harris Corporation is providing optical surface metrology to demonstrate both the quality of the optical surface and the correctablility produced by the axial actuators. © (2016) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Document-21545
Reviewed Under: 
LSST Project Publication Policy
Bibtex reference: 
@proceeding{doi:10.1117/12.2234021, author = {Neill, Douglas R. and Bogan, Gregory and Zajac, Dale and Araujo , Constanza and Gressler, William J. and DeVries, Joe and Hileman, Edward A. and Lotz, Paul J. and Mills, Dave and Thomas, Sandrine and Sebring, Thomas A. and Sebag, Jacques and Warner, Mike and Wiecha, Oliver}, title = { LSST secondary mirror system final design }, journal = {Proc. SPIE}, volume = {9906}, number = {}, pages = {990667-990667-12}, abstract = { The Large Synoptic Survey Telescope (LSST) has a 10 degrees square field of view which is achieved through a 3 mirror optical system comprised of an 8.4 meter primary, 3.5 meter secondary (M2) and a 5 meter tertiary mirror. The M2 is a 100mm thick meniscus convex asphere. The mirror surface is actively controlled by 72 axial electromechanical actuators (axial actuators). Transverse support is provided by 6 active tangential electromechanical actuators (tangent links). The final design has been completed by Harris Corporation. They are also providing the fabrication, integration and testing of the mirror cell assembly, as well as the figuring of the mirror. The final optical surface will be produced by ion figuring. All the actuators will experience 1 year of simulated life testing to ensure that they can withstand the rigorous demands produced by the LSST survey mission. Harris Corporation is providing optical surface metrology to demonstrate both the quality of the optical surface and the correctablility produced by the axial actuators. }, year = {2016}, doi = {10.1117/12.2234021}, URL = { http://dx.doi.org/10.1117/12.2234021}, eprint = {} }

Financial support for LSST comes from the National Science Foundation (NSF) through Cooperative Agreement No. 1258333, the Department of Energy (DOE) Office of Science under Contract No. DE-AC02-76SF00515, and private funding raised by the LSST Corporation. The NSF-funded LSST Project Office for construction was established as an operating center under management of the Association of Universities for Research in Astronomy (AURA).  The DOE-funded effort to build the LSST camera is managed by the SLAC National Accelerator Laboratory (SLAC).
The National Science Foundation (NSF) is an independent federal agency created by Congress in 1950 to promote the progress of science. NSF supports basic research and people to create knowledge that transforms the future.
NSF and DOE will continue to support LSST in its Operations phase. They will also provide support for scientific research with LSST data.   




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