Design Of Aspheric Wavefront Reconstruction System Based On Liquid Crystal Spatial Light Modulator

With the continuous development of optical technology,the requirements of optical components become more and more demanding.The lens has also developed from the traditional spherical surface to aspheric surface and even free-surface.However,aspheric surface and free-surface are limited in some applications because of the high difficulty in machining and testing.In this paper,the combination of liquid crystal spatial light modulator and traditional spherical lens which is easy to be machinable is studied to reconstruct the wavefront of aspheric lens,so as to avoid the problem of processing and testing aspheric lens.This paper has carried out a detailed design and research,the optical working band of the system is 532 nm.Firstly,the optical aspheric surface and liquid crystal spatial light modulator are systematically introduced,and the development status and application scenarios of liquid crystal spatial light modulator are introduced in detail.Secondly,the properties of liquid crystal materials,especially the electro-optic effect,are introduced,and the electronically controlled birefringence effect and phase delay theory used in liquid crystal spatial light modulator are discussed.And for this project combined with theoretical analysis of the use of liquid crystal spatial light modulator restrictions,then,on this basis established the basic experimental framework of this study.The lens that used for compensating and zernike phase diagram of the spherical lens are both designed and the imaging quality is analyzed.For the implementation of the scheme,a detailed tolerance simulation analysis and tolerance consistency analysis are carried out,and a mechanical clamping system suitable for this study is designed.Finally,a comparison between the designed system and the substituted aspheric surface system is made.The experimental results show that the wavefront reconstruction system designed has a good substitution of aspheric lens.This study provides the same industry design workers with new ideas,feasible design scheme,detailed design steps,has a very good reference significance.