Design and test of reference mirror in 300 mm interferometer
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Design and test of reference mirror in 300 mm interferometer
Optics and Precision EngineeringVol. 15, Issue 8, Pages: 1235-1240(2007)
作者机构:
1. 中国科学院 国家天文台南京天文光学技术研究所,江苏 南京,210042
2. 南京理工大学 电光学院,江苏 南京,210094
作者简介:
基金信息:
DOI:
CLC:TH744.3
Received:23 October 2006,
Revised:29 May 2007,
Published Online:30 August 2007,
Published:30 August 2007
稿件说明:
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WU Xu-hua, CHEN Lei, WANG Lei. Design and test of reference mirror in 300 mm interferometer[J]. Optics and precision engineering, 2007, 15(8): 1235-1240.
DOI:
WU Xu-hua, CHEN Lei, WANG Lei. Design and test of reference mirror in 300 mm interferometer[J]. Optics and precision engineering, 2007, 15(8): 1235-1240.DOI:
Design and test of reference mirror in 300 mm interferometer
In order to find an optimal supporting scheme for the reference mirror in a 300 mm interferometer
horizontal supports were modeled and analyzed in adhered spot edge support and band-back support using finite element method. For the sake of simplicity and economy
the ringy-band support with 10 mm wrap bandwidth was accepted to optimize the design
the ideal surface deformation of the reference mirror due to self-weight was obtained in the optimal support scheme. According to this result
a certain allowance was given for deformation when the mirror blanks were polishing. Then the surface of this mirror under practical condition was measured through building absolute liquid reference. By comparison
the differences of PV magnitudes and RMS values are only 0.008 λ and 0.005 λ
respectively. It is clear that the structural design of the interferometer reference mirror meets technical requirements very well. At last
several suggestions were given to eliminate the effects of thermal turbulence.