Research on edge control in the process of polishing using ultra precise bonnet on optical elements

Wei Wang, Min Xu, Guoyu Yu, David D. Walker, Hong Zhu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

High-quality optical elements are very important in modern technology; in particular top-quality aspheric optical elements. The concept of an extremely large ground based telescope is a significant technical challenge particularly for the manufacture of the optical components necessary to realize the very demanding performance. Extremely large ground based telescopes require many high-quality, large-diameter optical elements for their construction. The method of optical polishing, using an ultra precise bonnet, is based upon the use of computer controlled fabrication of an optical surface. A bonnet filled with air is used as a precise polishing tool which is flexible and can adapt itself well to the shape of the part, compared with other polishing methods. As with other polishing techniques the edge quality is a key factor affecting the performance of the optical element. In this paper, the effects of edge performance are analyzed, and three compensating techniques are discussed. It is demonstrated that, good edge control can be achieved by using a special removal function applied to the polishing process. Some experimental results are shown and a consecutive polishing process is described.

Original languageEnglish
Title of host publication5th International Symposium on Advanced Optical Manufacturing and Testing Technologies
Subtitle of host publicationLarge Mirrors and Telescopes
Volume7654
DOIs
Publication statusPublished - 15 Dec 2010
Externally publishedYes
Event5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes - Dalian, China
Duration: 26 Apr 201029 Apr 2010
Conference number: 5

Conference

Conference5th International Symposium on Advanced Optical Manufacturing and Testing Technologies
CountryChina
CityDalian
Period26/04/1029/04/10

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