针对噪声严重影响全息图采集时的质量和全息重建的效果,采取了电机带动毛玻璃片旋转的方法来去除全息系统的噪声。其理论依据为高速旋转的毛玻璃片能够降低激光的相干性,从而减小系统的本征噪声。利用旋转毛玻璃片的作用机理,将其应用于全息系统中,可有效去除系统中的噪声。实验表明,该方法能有效去除系统中的噪声,提高系统的信噪比,改善全息重建的效果。

Since noise seriously affects the quality of holograms and holographic reconstructions, a rotated diffuser was used to remove the noise of the holographic system. The rotated diffuser can reduce the coherence of the laser, thus reducing the intrinsic noise of the system. Based on this theoretical analysis, rotated diffuser was applied to the holographic system. Experiments show that the method described in this paper can eliminate the noise in the system effectively and improve its signal to noise ratio (SNR) and quality of the holographic reconstruction.