An integrated simulation method is established,and the performance assessment of optical systems is obtained,accordingly.New assessment functions are used for rigid-body displacement separation,which is conducted by deformation data from the Ansys thermal simulation.The computational accuracy of 0.3%is tested through setting displacement parameter and random value.Householder algorithm is adopted for Zernike fitting,and the Zernike coefficients are used as the interface for data exchange with Zemax,which is...