This paper analyzes the basic theory of rapid rotating scanning scheme for the off-axis 45° parallel two-mirror system, and constructs the transformation action matrix of optical vector in the rotating scanning process. Based on simulation with MATLAB, the relationship between the four control parameters of rotating scanning scheme for the off-axis 45° parallel two-mirror system and the scanning trajectories is analyzed in-depth, and the basic conditions of the control parameters are determined to achieve various scanning strategies. The performances of two scanning strategies (Linear scanning in any direction and Elliptical scanning in different ranges) are analyzed in detail. The scanning scheme discussed in this paper has the advantages of simple control, high scanning efficiency (100%), and flexible scanning strategy and so on by scanning with mirror rotating. It can realize the functions of rapid scanning for imaging with high linearity, region ergodic searching, random or complex path for searching and so on.
Based on the theory of reflection and rotation for vector, this paper theoretically analyzes the scanning scheme by rotating the coaxial two-mirror, and constructs the transformation matrix for vector. On this basis, the relationship between the five control parameters for the scanning scheme by rotating coaxial two-mirror and the scanning trajectory (corresponding to different scanning strategies) is deeply analyzed. The scanning scheme by rotating the coaxial two-mirror designed and analyzed in this paper has the advantages of simple control (with uniform circular motion), high scanning efficiency (100%), and flexible scanning strategy and so on. It can realize the functions of rapid scanning for imaging, region ergodic searching, random or complex path for scanning and so on.
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
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.