Research On Centering Edge Grinding Technology Of Aspherical Lens

With the rapid development of modern science and technology,aspheric optical lens with its unique imaging features are widely used in many optical instruments,compared with spherical lens,the aspheric lens not only improves the imaging quality of the optical system,but also ensures the lightweight of the system.However,because of the limitation of lens processing conditions in large diameter aspherical lens edge grinding process,the center deviation error prone to change,undermining the coaxality of the optical system,the influence effect of imaging system.The control of the center deviation error has become the key link in the process of aspheric lens edge grinding,this paper from the aspects of theory and practice,on the aspheric lens at the center deviation error.To study the change of aspheric lens center deviation error to the effects of the optical system,this paper from the perspective of the theory of aberration,aspheric lens in the optical system introduced disturbance parameters,through the analysis of the change of system astigmatism and coma,be changed on the aspheric lens center deviation error and the spherical mirror affect trend of different.Research shows that the change of the aspheric lens center deviation error caused aberration of optical system is larger,compared with spherical lens,in the process of edge grinding of aspheric lens,more strict control of its center deviation error.This topic to design a new type of vertical double location centering edge grinding equipment.According to the requirements of the aspheric lens center deviation error technology,propose the overall design scheme and technical indicators of the equipment,shafting system,optical centering system and control system and other key parts of the design.The equipment adopts a vertical structure to avoid the influence of the self-weight of the lens on the centering accuracy during edging;the equipment adopts a double-station structure,which further improves the processing efficiency;the equipment adopts the laser centering method,which further improves the centering accuracy;the equipment improves The structure of the end face of the lens chuck increases the contact area with the lens,which can effectively avoid the indentation on the working surface after the lens is clamped.At the same time of friction,the equipment accuracy is further improved.Finally according to the actual working condition of equipment,the equipment has carried on the static and dynamic simulation analysis of frame structure,results show that the equipment of frame structure with good rigidity and stability,and can satisfy the use requirement.And according to the requirements of the design index of equipment assembly,finishing the whole assembly of the equipment.