Research On Optical Centering Assembly Reflective And Measuring System

With the rapid development of optical technology,the performance requirements of optical systems are becoming more and more strict,which makes the optical system more complicated,and correspondingly puts higher requirements on optical equipment and technology.The central deviation is one of the important evaluation indexes for evaluating the quality of optical system adjustment.Its existence destroys the straightness of the optical system optical axis and seriously affects the performance index of the optical system.And with the development of invisible light imaging technology,the center deviation detection technology for the optical system in the invisible light band presents a new challenge.For the problem of center deviation detection of multi-band optical system,this paper designs a new type of catadioptric optical centering instrument.The center deviation of multiple band optical systems can be measured while maintaining high accuracy.Firstly,based on the induction and summary of the central deviation measurement method,based on the selfcollimation reflection rotation measurement method,the initial structure of the optical system is determined by the improvement of the double mirror reflection system.The analysis results show that the near-axis field of view of the optical system in the visible and near-infrared bands is close to 0.2 at a spatial frequency of 40 lp/mm.The energy of 80% is concentrated in the range of less than 48 ?m in diameter,and the distortion is less than 0.2%,which satisfies the system requirements;Secondly,according to the requirements of technical indicators,the structural design of the center-bias detection system is completed,and its mechanical properties and vibration modes are analyzed.The analysis results show that the mechanical mechanism of the system is very stable and can effectively guarantee the imaging quality of the system;Finally,this paper builds a related experimental device,which verifies the center-offset measurement of the system in the visible and invisible bands,and compares it with the measured data of the standard centering instrument.The experimental results show that the measurement in the visible light system The error is 0.67?m,and the measurement error of the system in the invisible light band is 0.63?m.The design scheme can be used for lens center deviation measurement of multiple bands,and the measurement accuracy is high,meeting the design specifications and usage requirements.