The principle of the system is laser screen cutting: when the object moving laser screen, its velocity is gained using of acquiring optics flux.
该系统利用激光光幕区截原理：即当运动目标通过激光光幕时，采集光通量的变化从而获得运动目标的平均速度。
As the optics of the primary stage heliostat is of non-imaging nature, the analytical method for studying the flux distribution of the hot spot of this type of solar furnace would be complicated.
由于主聚光定日镜的非成像特征，使用解析方法对该太阳炉的热点进行聚光比分布的分析就变得非常复杂。
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