Gu Huarong, Yin Songfeng, Tan Qiaofeng, Cao Liangcai, He Qingsheng, Jin Guofan
State Key Laboratory of Precision Measurement Technology and Instruments, Tsinghua University, Beijing, 100084, China.
Appl Opt. 2009 Nov 10;48(32):6234-40. doi: 10.1364/AO.48.006234.
A cross-shaped aperture is proposed to improve signal-to-noise ratio (SNR) in the holographic data storage system (HDSS). Both simulated and experimental results show that higher SNR can be achieved by the cross-shaped aperture than traditional square or circular apertures with the same area. A maximum gain of 20% in SNR is obtained for the optimized cross-shaped aperture. The sensitivities to pixel misalignment and magnification error are also numerically compared.
提出了一种十字形孔径以提高全息数据存储系统（HDSS）中的信噪比（SNR）。模拟和实验结果均表明，与具有相同面积的传统方形或圆形孔径相比，十字形孔径能够实现更高的信噪比。对于优化后的十字形孔径，信噪比可获得高达20%的最大增益。还对像素对准误差和放大误差的敏感度进行了数值比较。
