Physics – Optics
Scientific paper
Jan 2012
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21915602k&link_type=abstract
American Astronomical Society, AAS Meeting #219, #156.02
Physics
Optics
Scientific paper
The LSST Project continues to advance the design and development of an observatory system capable of capturing 18,000 deg2 of the sky uniformly in depth in six wavebands over ten years with a 3.5 degree field of view optical system and 3.2 billion pixel camera. The telescope and site engineering designs to support the mission have developed to a preliminary state and construction activities using non-federal funds are proceeding in the areas of mirror fabrication and early site development. Mirror fabrication of each of the mirrors has started using these private funds; an 8.4 m primary (M1) and 5.0 m tertiary (M3) built into a single monolithic substrate and the 3.5 m diameter secondary (M2). Optical fabrication of the unique M1/M3 monolithic mirror has entered final front surface optical processing. Loose abrasive grinding of the M1 surface is complete and has begun on the M3 surface. Polishing will follow and final optical testing is planned in mid 2012. Several critical aspects of the support systems for these mirrors have been prototyped and further risk reduction prototypes are planned. The telescope design has been advanced to include revised baffling that works more efficiently with the dome stray light and wind screen. Design of the dome has been updated to include the positioning of the updated calibration screen. The full summit facility is now at a 90% level of completion; a state sufficient to reveal many of the building details to support operations on the summit including the service and maintenance activities. The active optics wavefront system has been prototyped and shows alignment and mirror surface figure can be maintained to specifications.
Andrew John R.
Barr Jeffrey D.
Chandrasekharan Shailesh
Claver Charles Frederick
DeVries Joe
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