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采用信噪比损失系数 (LSNR)深入研究了光折变铌酸锂晶体中散射噪声对全息输入图像像质的影响。对不同掺杂物质、不同掺杂浓度、不同处理方法以及不同记录方式的大量晶体进行了实验研究 ,并重点考察了物光束引起的散射噪声的特性。实验结果表明 ,氧化态晶体的散射噪声的影响小于生长态和还原态晶体 ,反射光路较之透射光路和邻面入射 ( 90°)光路更不易受散射噪音影响
The effect of scattering noise on the image quality of holographic input image is studied in detail by using the loss of signal to noise ratio (LSNR). A large number of crystals with different dopants, different doping concentrations, different treatment methods and different recording methods were studied experimentally, and the characteristics of scattering noise caused by the object beam were emphatically investigated. The experimental results show that the scattering noise of the oxidized crystal is smaller than that of the grown and reduced crystals, and the reflected optical path is less affected by the scattering noise than the transmitted and adjacent incident (90 °) optical paths