光寻址空间光调制器前置滤波  

Prefilter in Spatial Light Modulator of Light Address

作　　者：邓志鹏[1] 杨杰[1] 全勇[1] 

机构地区：[1]上海交通大学图像处理和模式识别研究所,上海200030

出　　处：《上海交通大学学报》2002年第6期789-791,795,共4页Journal of Shanghai Jiaotong University

摘　　要：分析了光寻址空间光调制器对连续图像采样和能量量化所产生的噪声和假频 ,判别出产生噪声主要为高斯噪声 .借助电子学中 A/D转换前置滤波概念 ,提出了一种光学前置滤波的方法 ,即在傅立叶变换透镜前加入矩形窗函数用于消除假频和抑制噪声 ,将此函数融入系统的设计中 ,既没有使系统结构复杂 ,同时又使此系统具有滤波。The sources of noises and artificial frequency in the process of imaging are sampling continuous image and quantification of energy by using spatial light modulator of light address, and the produced noises is mainly Gauss noises, it was analyzed in theory. Using the antialiasing prefilters which is a notion of electronics, a method of light prefilter was put forward, by which a function of rectangular windows is added in front of Fourier lens to reduce artificial frequency and restrain noises. This function can be realized in the system designing which does not increase the complexity of system structure, and also makes this system have the functions of filter, restraining noises and improving the signal to noise.

关 键 词：光寻址空间光调制器 前置滤波 光学傅立叶变换 A/D转换 假频消除 噪声抑制 信噪比 光学信号处理 

分 类 号：TN911.74[电子电信—通信与信息系统]