Volume 11 Issue 4
Jul.  2018
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ZHAO Xiao-dong, WANG Jing. Analysis of the mirror deformation of one-meter theodolite protective window[J]. Chinese Optics, 2018, 11(4): 654-661. doi: 10.3788/CO.20181104.0654
Citation: ZHAO Xiao-dong, WANG Jing. Analysis of the mirror deformation of one-meter theodolite protective window[J]. Chinese Optics, 2018, 11(4): 654-661. doi: 10.3788/CO.20181104.0654

Analysis of the mirror deformation of one-meter theodolite protective window

doi: 10.3788/CO.20181104.0654
Funds:

National Nature Science Foundation of China No.11403064

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  • Corresponding author: WANG Jing, E-mail:wangjing@ciomp.an.cn
  • Received Date: 2017-12-26
  • Rev Recd Date: 2018-02-05
  • Publish Date: 2018-08-01
  • In order to accurately analyze the mirror deformation of the one-meter theodolite protective window under exterior loads, the model of one-meter theodolite protective window is built on the base of frictional contact finite element theory, the differences between linear rigid joint and nonlinear frictional contact simulation methods are compared. Homogeneous coordinate transformation method is used to remove the rigid body displacement, and the mirror distortion data of the protection window of the meter-caliber theodolite is obtained. The Zernike polynomial is used as an interface tool for the integrated optomechanical analysis, and Zernike polynomial coefficients are introduced into ZEMAX. The effect of mirror distortion on image quality is measured by the RMS value of wavefront aberration, and is compared with the results of the interferometer test. The RMS value of the mirror wavefront aberration is 38.095 nm and the PV is 205.027 nm. The RMS value of the wavefront aberration is 40.626 nm and the PV is 235.654 nm. The experimental results show that the deviation of the RMS value of the specular wavefront aberration between the simulation experiment and the interferometer detection experiment considering the frictional contact condition is 6.23%, thus more accurately reflect the mirror deformation of the meter-level aperture protection window.
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