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Diffraction device for real-time recognizing and tracing the moving target

A novel method to detect the convolution interlaced minimum for recognizing and tracing the moving target is proposed in this paper. A diffraction device, which can divide an incidence light into 33 X 33 arrays evenly is designed and fabricated. With two 33 X 33 diffraction devices, a dual channel optical real-time processor is built for parallel performing the recognition and tracing of the moving target. Some measures for compensating scale and rotation distortion for moving recognition are provided. The experimental results show that: (1) The 33 X 33 diffraction device has a good diffraction efficiency, 62.5%. (2) The moving target can be recognized parallelly by one step of operation. (3) The scale and rotation distortion of the moving target recognition is insensible. The change of rotation angle to be allowed in moving target recognition is from -25 degree(s) to +25 degree(s).