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Proceedings Paper

Study on wavefront pre-compensation of thermal deformation aberrations in the beam path by FEM and Zernike polynomials
Author(s): Qiong Zhou; Wenguang Liu; Zongfu Jiang; Xiaojun Xu
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Paper Abstract

We present a new method to calculate wavefront pre-compensation of the thermal deformation aberrations based on the finite element method (FEM) and Zernike polynomials. The thermal deformation aberrations of a plat circular Si mirror are theoretically analyzed in detail. Model of the beam path with 4 reflective mirrors and a uniform incident laser source is established. With the above model, performances of the outgoing laser with and without wavefront pre-compensation are calculated, respectively. The results show that the Strehl ratio of the outgoing laser beam is increased from 0.13 to 0.66 with wavefront pre-compensation using the new method. The influence of Fresnel number on the ability of wavefront pre-compensation was also studied. The value of SR increases to 0.83 as the Fresnel number is 257. The ability of wavefront pre-compensation is limited when the Fresnel number is small.

Paper Details

Date Published: 1 May 2014
PDF: 9 pages
Proc. SPIE 9131, Optical Modelling and Design III, 91311C (1 May 2014); doi: 10.1117/12.2050245
Show Author Affiliations
Qiong Zhou, National Univ. of Defense Technology (China)
Wenguang Liu, National Univ. of Defense Technology (China)
Zongfu Jiang, National Univ. of Defense Technology (China)
Xiaojun Xu, National Univ. of Defense Technology (China)


Published in SPIE Proceedings Vol. 9131:
Optical Modelling and Design III
Frank Wyrowski; John T. Sheridan; Jani Tervo; Youri Meuret, Editor(s)

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