Some methods for the fabrication of large diameter off-axis paraboloids

Depei Li; Xiaolian Chen

doi:10.1117/12.867636

13 October 2010 Some methods for the fabrication of large diameter off-axis paraboloids

Depei Li, Xiaolian Chen

Proceedings Volume 7654, 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes; 76541O (2010) https://doi.org/10.1117/12.867636
Event: 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies, 2010, Dalian, China

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.

Citation Download Citation

Depei Li and Xiaolian Chen "Some methods for the fabrication of large diameter off-axis paraboloids", Proc. SPIE 7654, 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes, 76541O (13 October 2010); https://doi.org/10.1117/12.867636

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