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Proceedings Paper

The dynamic interferometry technology of 4.5-meter concave aspherical mirror and relativity precision analysis
Author(s): Zhao Wang; Wei Zhang; Zhi-bin Ren
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Paper Abstract

The dynamic interferometry is used to overcome the problem of the vibration and the air turbulence present in the testing process of concave aspherical mirror, whose aperture is extra large, and optical path is extra long. Aiming to 4.5m aperture concave mirror, two schemes have been designed: offner refractive and reflective compensators. The analytical model of the theoretical error analysis under the dynamic interferometry condition has been built. According to the result we can come to a conclusion that using the method of dynamic interferometry, the accuracy of measuring can be reached within λ/80. The optical testing path of mirror with multiple segments has been designed in the end. Results of this paper could provide references for the design, processing, assembling and testing technologies of large or extra large optical system.

Paper Details

Date Published: 20 November 2009
PDF: 8 pages
Proc. SPIE 7511, 2009 International Conference on Optical Instruments and Technology: Optoelectronic Measurement Technology and Systems, 75110D (20 November 2009); doi: 10.1117/12.835988
Show Author Affiliations
Zhao Wang, Harbin Institute of Technology (China)
Wei Zhang, Harbin Institute of Technology (China)
Zhi-bin Ren, Harbin Institute of Technology (China)


Published in SPIE Proceedings Vol. 7511:
2009 International Conference on Optical Instruments and Technology: Optoelectronic Measurement Technology and Systems
Shenghua Ye; Guangjun Zhang; Jun Ni, Editor(s)

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