多阶存储是一种无需减小记录波长或增大数值孔径而显著提高光存储容量的新颖方法。对光致变色材料采用不同的光能量写入 ,读出时则具有不同的吸收率 ,该特性可用来实现多阶数据存储。在研究光致变色材料曝光特性的基础上 ,提出了基于光致变色原理的多阶存储数学模型 ,该模型反映了光致变色材料吸收率与曝光量之间的非线性关系 ,为光致变色材料的多阶存储写策略的优化提供了理论依据。在 4阶和 8阶静态存储实验结果中 ,各信号峰值之间有明显的阶次变化 ,且信号之间没有交叠现象 ,从而验证了利用该材料进行多阶存储的可行性。将该多阶技术应用在实际光盘存储中 ,可实现两至三倍于普通光盘容量的高密度存储 Multi-level storage is a novel method that significantly increases the optical storage capacity without reducing the recording wavelength or increasing the numerical aperture. Different photochromic materials are used for photochromic materials and have different absorption rates when read out. This feature can be used to achieve multi-level data storage. Based on the study of the photochromic material’s exposure characteristics, a multi-stage storage mathematical model based on the principle of photochromism is proposed. The model reflects the nonlinear relationship between the photochromic material absorptance and the exposure amount, The material multi-stage storage write strategy optimization provides a theoretical basis. In the fourth and eighth order static storage experiment results, there is obvious order change between the signal peaks, and there is no overlap between the signals, which verifies the feasibility of using the material for multi-stage storage. Applying this multi-stage technology to actual disc storage enables high-density storage two to three times faster than regular disc capacity