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The Computer Design of Off Axis Tolerance in an Optical System

Wang Yongzhong, Wang Xiao (Section 204,National University of Defense Technology,Changsha,410073)  
By use of the light path calculation and image quality evaluation theory in non coaxial optical system,we calculate the corresponding limited differential in Tchebycheff image quality function through the micro displacement and micro tilt of optical surface,optical element and component,thus the influence degree of various kind of off axis errors on image quality can be obtained.The various off axis tolerances in a coaxial optical system can be obtained according to the extremum theory of multi element function and the adaptive optimizing technique.The optimal distribution of the tolerances can be realized through feedback and nonlinear processing.
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