Numerical methods to compute optical errors due to thermo-elastic effects

Yi Yang; Shijin Chen; Wei Zhang

doi:10.1117/12.574225

10 February 2005 Numerical methods to compute optical errors due to thermo-elastic effects

Yi Yang, Shijin Chen, Wei Zhang

Proceedings Volume 5638, Optical Design and Testing II; (2005) https://doi.org/10.1117/12.574225
Event: Photonics Asia, 2004, Beijing, China

Abstract

A method to compute optical errors subject to temperature variations in the optical components is presented. In general, temperatures, displacements and stresses at arbitrary located FE nodes can not be input directly into optical software. This paper discusses integrated techniques coupling finite element analysis and optical design software. The theory of the method is Zernike polynomials are useful to describe optical surface deformations and wave-front error due to thermal variations and mechanical stress. Thus Zernike polynomials act as the data transmission tool between optical and finite element analysis programs. The coefficient of Zernike polynomials as computed by which we designed codes may be output as CODE V files to evaluate the mechanical effects on the optical performance. An example is demonstrated for thermo-elastic affects the optical performance of a primary mirror of Cassegrain telescope.

Citation Download Citation

Yi Yang, Shijin Chen, and Wei Zhang "Numerical methods to compute optical errors due to thermo-elastic effects", Proc. SPIE 5638, Optical Design and Testing II, (10 February 2005); https://doi.org/10.1117/12.574225

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