Abstract
In the present research, a new bending system using a segmented vacuum chuck for Stressed Mirror Polishing (SMP) is developed. SMP is a special fabrication method for thin aspheric mirrors, where simple flat or spherical fabrication is applied while a mirror blank is deflected. Since a mirror blank is usually glued to a bending fixture in the conventional SMP process, there are drawbacks such as long curing time, inconvenience of mirror replacement, risk of mirror breakage, and stress concentration near the glued area. To resolve the drawbacks, a new bending system is designed to effectively hold a mirror blank by vacuum. For the developed bending system, the optimal bending load to achieve the designated mirror deflection is found by finite element analysis and an optimization algorithm. With the measurement results of the deflected mirror surfaces with the optimal bending loads, the feasibility of the developed bending system is investigated. As a result, it is shown that the bending system is appropriate for the SMP process.
© 2017 Optical Society of Korea
PDF Article
More Like This
Active Optics: stress polishing of toric mirrors for the VLT SPHERE adaptive optics system
Emmanuel Hugot, Marc Ferrari, Kacem El Hadi, Pascal Vola, Jean Luc Gimenez, GĂ©rard R. Lemaitre, Patrick Rabou, Kjetil Dohlen, Pascal Puget, Jean Luc Beuzit, and Norbert Hubin
Appl. Opt. 48(15) 2932-2941 (2009)
Cited By
Optica participates in Crossref's Cited-By Linking service. Citing articles from Optica Publishing Group journals and other participating publishers are listed here.