Research On The Influence Of Optical Machine Structure Parameters On The Impact Resistance Of Optical System

With the development of photoelectric detection technology,it is gradually applied to detecting the target in high overload environment,which puts forward new requirements for the structure design of photoelectric detection system.In order to provide a theoretical basis for the optimal design of the structural parameters in high overload environment,this paper studies the impact resistance of the opto-mechanical structural parameters.In this paper,the finite element method(FEM)is introduced to study the whole-field evolution process of the stress and the deformation of the opto-mechanical structures under strong impact condition,and the finite element form of the mathematical model of stress and structure evolution of the optical systems is deduced.Secondly,based on Solid Works combined with ANSYS,taking the lens of diameter 35 mm as the object,the deformation and distribution of equivalent stress of the lens in different mounting structures have been obtained under the overload condition of 10000 g.The effects of the lens material,the washer thickness and the preload on the stress and deformation of optical lens are analyzed.The results show that increasing the pre-tightening force and the thickness of the washer is helpful to improve the overload resistance of the system.The optimum pre-tightening force is 9800 N in this paper.Thirdly,to optimize the design of the opto-mechanical structure against the high impact environment,the orthogonal test method is introduced to analyze the order,the trend and the proportion of the three factors affecting the maximum deformation and stress value of the lens.Finally,the actual installation structure of the lens with a diameter of 35 mm is used to validate the simulation conclusion.The impact test results verify that the lens of K9 glass can withstand 10000 g overload impact when the washer thickness is 1.0mm and the preload is 9800 N.The research in this paper provides an effective way for the analysis of the mechanical and structural evolution characteristics of optical system in strong impact environment,and has a certain reference value for the optimization design of structural parameters of the optical mechanical system in strong impact environment.