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利用空间角度复用方式与球面参考波相结合的全息复用存储技术,在盘状LiNbO3∶Fe晶体单一扇形区域内成功存储10000幅高分辨率图像,存储面密度达33 7 bits/μm2.在此基础上,将分批热固定的方法应用于盘式体全息存储,分4批次存储了5000幅高分辨率图像,从而将存储面密度进一步提高到50 bits/μm2.会聚的球面参考波及优化的光路配置减小了参考光的反射光斑尺寸,同时也减少了有害的杂散光从晶体表面反射进入成像光路,保证存储图像能得到良好的再现.
Utilizing the holographic multiplexed memory technology, which combines space angle multiplexing with spherical reference wave, successfully stores 10,000 high-resolution images in a single fan-shaped area of the disk-like LiNbO3: Fe crystal with a memory density of 33 7 bits / μm2. On this basis, the method of batch heat fixation was applied to disc body holographic storage, and 5000 high-resolution images were stored in 4 batches, further increasing the storage density to 50 bits / μm 2. The optimized optical path configuration reduces the size of the reflected light spot of the reference light and reduces the reflection of harmful stray light from the crystal surface into the imaging optical path to ensure that the stored image can be reproduced well.