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双光子吸收三维光信息存储是实现高密度光存储的重要方法。三维数据写入过程中光束需经过两层不同的介质(如空气和存储材料),对像差和存储效果产生很大的影响,因此在理论和实验上分析系统各项光学参量对折射率失配引起的像差和存储效果的影响具有很大的意义。首先建立光学存储系统模型,在平行平板条件下,利用波像差函数推导展开,获得五项初级(赛德耳)像差,即球差、彗差、像散、场曲、畸变,然后对于存储材料在水平和倾斜两种情况下对初级像差进行模拟计算与分析,理论模拟与实验表明:物镜的数值孔径越大,像差随着存储深度增加而增大的速度就越快。
Two-photon absorption three-dimensional optical information storage is an important method to achieve high-density optical storage. In the process of 3D data writing, the light beam needs to pass through two layers of different media (such as air and storage materials) and has a great influence on the aberration and the storage effect. Therefore, the theoretical and experimental analysis of the system’s optical parameters on the refractive index loss The effects of aberration and storage caused by matching are of great significance. Firstly, the model of optical storage system is established. Under the condition of parallel plates, the wavefront aberration is used to derive and derive five primary (Seidel) aberrations, ie, spherical aberration, coma, astigmatism, curvature of field and distortion. The primary aberrations of the storage material are simulated and analyzed in both horizontal and oblique conditions. The theoretical simulation and experiments show that the larger the numerical aperture of the objective lens, the faster the aberration increases with the increase of the storage depth.