光寻址空间光调制器前置滤波

分析了光寻址空间光调制器对加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作假频和抑制噪声，将比函数入系统的设计中，既没有使系统结构复杂，同时又使此系统具有滤波，抑制噪声和提高信噪比的功能。

Prefilter in Spatial Light Modulator of Light Address

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.