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Proceedings Paper

Some methods for the fabrication of large diameter off-axis paraboloids
Author(s): Depei Li; Xiaolian Chen
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Paper Abstract

Off-axis paraboloid is commonly used in optical systems and collimator, its greatest advantage is that no central shelter. Difficulties of manufacture depend on the processing precision of mirror, focal length, aperture size and off-axis. As an asymmetry surface, it is really a hard work to manufacture a surface with an amount of large off-axis, large-diameter, large volume of non-sphere. Here, some of the techniques such as "the way of cutting from master mirrors", "the way of filling up with sub mirrors", "the way of polishing sub mirrors directly", "the way of stretch deformations with stress" are discussed. Finally, some manufactures and results of master mirrors with diameter from 500 millimeters to 2000 millimeters are reported.

Paper Details

Date Published: 14 October 2010
PDF: 8 pages
Proc. SPIE 7654, 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes, 76541O (14 October 2010); doi: 10.1117/12.867636
Show Author Affiliations
Depei Li, Nanjing Institute of Astronomical Optics & Technology (China)
Xiaolian Chen, Nanjing Astronomical Instrument Co. Ltd. (China)


Published in SPIE Proceedings Vol. 7654:
5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes

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