为了解决光学相关器无法与发生旋转的目标进行光学相关识别的问题，提出了使用平面反射镜组获取目标图像，与模板图像进行相关识别。在获取目标的光学系统中，加入一个由多个平面反射镜围成的正多棱柱体，它可以使目标产生的一组不同角度的镜像，将其作为目标图像与模板图像进行相关识别。可以从不同旋转角度的目标产生的镜像组中找到角度相似的镜像，这类目标图像与模板图像进行相关运算，能够得到相关峰。实验表明，将通过平面反射镜组获得的目标的镜像组作为目标图像，是解决光学相关器针对旋转目标识别问题的有效途径。

In order to research the problems which optical correlator can not recognize with the rotating target. It is proposed that by using the plane mirror group we can obtain the target image and recognize with the mirror image of the template image. In the optical system of acquire target, inserting a polygonal prism which is enclosed by plurality of plane mirror, it can make the target to produce a set of different angles mirror image. The similar angle mirror image can be found from a set of mirror image by different rotation angle target, and correlation peak is acquired when such target image and template are correlated. Experimental results show that mirror image of the rotating target obtained by the plane mirror group as the target image, is an effective way to resolve problem that optical correlator recognize with the target.