Study On The Driving Structure Of All Solid State Zoom Microlens Based On PDMS Thin Film

In recent years,micro-lenses have played an irreplaceable role as the camera of smart devices.People are more and more enthusiastic about taking pictures to record people,things or scenery at that moment,to record their beautiful moments.The traditional lens optical zoom generally uses a voice coil motor(VCM)camera,in which the focal length of the lens does not change,the size of the VCM power supply current is controlled by the Driver IC,and a magnetic force is generated to adjust the distance moved by the lens mounted on the VCM.When adjusted to an appropriate position In order to take a clear picture.This working principle makes the voice coil motor occupy a relatively large space in the camera assembly.The thickest part of the smart device is often the camera area.This makes the camera unable to be miniaturized,and because it is magnetically driven,it has electromagnetic interference and power.Consumption,long response time,etc.And the micro-lens of some smart devices abandons the traditional optical zoom and uses digital focusing,which makes it impossible for the micro-lens to change the focal length when shooting a distant target.The image is not clear.As a result,more and more experts and scholars at home and abroad have begun to study changing the focal length of the microlenses themselves.Therefore,variable microlenses have emerged as the times require.This article focuses on the various types of zoom microlenses reported.From the principle of zooming,it can be roughly divided into twocategories: changing the surface morphology of the lens body and changing the refractive index of the lens body.Based on a thorough understanding of them,we propose an all-solid-state variable focus microlens and carry out a more in-depth study of it.In this paper,an all-solid-state zoom microlens is proposed.Based on the research at home and abroad,two kinds of zoom microlenses based on electrostatic driving and piezoelectric driving are designed,using finite element The simulation method carried out a series of simulations,including the deformation of the microlens lens body,the deformation of the driver,the change of the radius of curvature,and the influence of the changes of the lens components on the deformation of the microlens under different voltages.I also used ZEMAX software to compare the calculated results with the simulation results,and found that the calculated focal length difference between the two is about 6cm,and the error is relatively small.We conducted a detailed analysis of the final simulation results,which provided a solid theoretical basis for the subsequent production of variable focus microlenses.Finally,according to the existing conditions in the laboratory,we made a manually driven variable microlens and a piezoelectric driven variable microprojection lens.Immediately afterwards,an optical platform for the laboratory was built,and the focusing effect of the lens was briefly tested.Studies have shown that at 0-70 V,the variable focal length of the variable microlens has a wide range and clear imaging,but the required driving voltage is higher,which is the direction of our future efforts.