The influence of errors on the optical system’s image quality was theoretically investigated using error theory. The accuracy of surface figure fitting was researched. In this paper, we analyzed many sections that may cause error based on thermal analysis and mechanical analysis. We used error analysis to consider the accuracy of surface figure fitting. We took account of the error of ABAQUS modeling, initial error, error of surface figure fitting, error of MATLAB and the error of ZEMAX. We at last gained the total error, and analyzed which is the dominant error. The main result can be used to assess and correct the error of opto-mechanical-thermal, and provide support for Quadratic optimization design.
Zernike polynomials are usually used to describe the wave-front of an optical system, but it is also used to
stand for the surface of an optical system. Researching the algorithm in this paper is according to this
When temperature of a lens increases from -60°C to 60°C, the surface of the lens will change
simultaneously, which will influence the image quality and the sensitivity of the detector. In this paper this
progress will be simulated by finite element software, abaqus. After that the data of the lens whose
surfaces have deformed will be exported. Zernike polynomials are used to describe the changed surface,
and zernike coefficients are calculated with matlab by using the method of least squares. All of the the
zernike coefficients are imported to an optical design software, zemax, and then the aberrations
coefficients can be got from the software. Finally, the solution of avoiding these problems caused by
temperature changing can be obtained.