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4 August 2009 The optical scanning technology in laser scanning and tracking system
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Laser scanning and tracking technology has been widely used in many applications. For a laser scanning and tracking system, a two-dimensional scanning mirror is usually combined with a plane array detector to detect and track the object. The scanning process and quality of acquired images from the detector are two key factors and they are both correlated with the choice of scanning mode, which is a known hard problem and little has been done in the subject. Based on this deficiency, this paper analyzes and compares two common two-dimensional scan mode-continuous scan and step scan, from a theoretical point of view. As we known, the continuous scan can acquire data quickly and is easy to implement. But the acquired images may blur severely due to the fast continuous scan velocity. The step scan can produce highquality images, but it takes much longer time and is more difficult to control. Formulas are proposed in this paper to quantitatively measure the characteristics of each mode and evaluate the parameters that affect the scanning process. These results can be provided as a reference for the proper choice of scanning mode. Moreover, through analysis of imaging characteristics of the detector, an improved raster scan pattern is presented to reduce the number of dead zones and enhance the performance of the system.
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Shu-ying Li and Shi-chun Zhou "The optical scanning technology in laser scanning and tracking system", Proc. SPIE 7383, International Symposium on Photoelectronic Detection and Imaging 2009: Advances in Infrared Imaging and Applications, 73832B (4 August 2009);

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