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Research on rapid scanning technology for imaging with high performance based on rotating of two-mirror

In order to break through the bottlenecks for traditional optical mechanical scanning system (lower imaging frame frequency and difficult to control), this article analyzed the rapid scanning technology for imaging with high performance based on rotating of two-mirror. By using rotation of two-mirror instead of swinging back and forth for traditional scanning mode, we achieved scanning pattern with high linearity in the large field, while scanning fast, and 100% for scanning efficiency, the difficulty of system controlling is also reduced. This technology can effectively surmount the technical challenges of various optical imaging systems currently (especially for the terahertz detection system) in security screening field which requires high speed of scanning for imaging. Based on the theory of specular reflection and rotation for vectors, this article discussed and simulated several kinds of rapid scanning system for imaging by rotating of two-mirror in detail, such as Newton Telescope, Ritchey-Chretien or Gregory Telescope, dual 45 degree mirror system, fore based 45 degree mirror system，and so on. And then we obtained the quantitative relationship between the parameters of rotation for mirror controlling and the scanning trajectory in this paper. On this basis, this article compared and analyzed the performance for the series of two-mirror systems listed above which realized fast scanning for imaging, including the scanning range and scanning linearity. The results calculated in this paper can provide guidance for the selection of the structure and the optimization design of the scheme for the rapid scanning system for imaging