LSST reflective coating studies

Jacques Sebag; Victor Krabbendam; Gary Poczulp; Douglas Neill; Tomislav Vucina; Maxime Boccas

doi:10.1117/12.670611

6 July 2006 LSST reflective coating studies

Jacques Sebag, Victor Krabbendam, Gary Poczulp, Douglas Neill, Tomislav Vucina, Maxime Boccas

Proceedings Volume 6273, Optomechanical Technologies for Astronomy; 62730X (2006) https://doi.org/10.1117/12.670611
Event: SPIE Astronomical Telescopes + Instrumentation, 2006, Orlando, Florida , United States

Abstract

The Large Synoptic Survey Telescope (LSST) baseline design includes aluminum coating for the large mirrors in its 3 element modified Paul Baker optical design. The 8.4 meter diameter of the primary provides a significant challenge to the LSST coating plans however such coatings have successfully achieved for this size aperture. LSST also recognizes that the use of mirror coatings with higher reflectivity and durability would significantly benefit its science by increasing its overall throughput and improving its operational efficiency. LSST has identified Lawrence Livermore National Laboratory (LLNL) blue-shifted protected silver coating as a possible candidate to provide this blue wavelength performance. A study has been started to assess the performance of these and other coatings in the observatory environment. We present the details of this ongoing program, the results obtained so far, and related coating tests results. LSST has also engaged in collaboration with the Gemini Telescope in the development and testing of an Al-Ag coating based on their current recipe. The first results of these tests are also included in this report.

Citation Download Citation

Jacques Sebag, Victor Krabbendam, Gary Poczulp, Douglas Neill, Tomislav Vucina, and Maxime Boccas "LSST reflective coating studies", Proc. SPIE 6273, Optomechanical Technologies for Astronomy, 62730X (6 July 2006); https://doi.org/10.1117/12.670611

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