9 September 2005 Design and optimization of the Spherical Primary Optical Telescope (SPOT) primary mirror segment
Author Affiliations +
Proceedings Volume 5877, Optomechanics 2005; 587711 (2005) https://doi.org/10.1117/12.626566
Event: Optics and Photonics 2005, 2005, San Diego, California, United States
The 3m Spherical Primary Optical Telescope (SPOT) will utilize a single ring of 0.86 m point-to-point hexagonal mirror segments. The f2.85 spherical mirror blanks will be fabricated by the same replication process used for mass-produced commercial telescope mirrors. Diffraction-limited phasing will require segment-to-segment radius of curvature (ROC) variation of ~1 micron. Low-cost, replicated segment ROC variations could be almost 1 mm, necessitating a method for segment ROC adjustment & matching. A mechanical architecture has been designed that allows segment ROC to be adjusted up to 400 microns while introducing a minimum figure error, allowing segment-to-segment ROC matching. A key feature of the architecture is the unique back profile of the mirror segments. The back profile of the mirror was developed with shape optimization in MSC.Nastran™ using optical performance response equations written with SigFit. A candidate back profile was generated which minimized ROC-adjustment-induced surface error while meeting the constraints imposed by the fabrication method.
© (2005) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Jason G. Budinoff, Jason G. Budinoff, Gregory J. Michels, Gregory J. Michels, } "Design and optimization of the Spherical Primary Optical Telescope (SPOT) primary mirror segment", Proc. SPIE 5877, Optomechanics 2005, 587711 (9 September 2005); doi: 10.1117/12.626566; https://doi.org/10.1117/12.626566


Design of the Giant Magellan Telescope
Proceedings of SPIE (July 21 2014)
Progress report on the Magellan 8-m telescope project
Proceedings of SPIE (June 30 1990)
Experience with wind-excited mirror vibrations
Proceedings of SPIE (July 06 2004)
Large Binocular Telescope M3 units design
Proceedings of SPIE (August 01 2000)
21st Century Telescope
Proceedings of SPIE (August 19 1986)

Back to Top