苏联科学院西伯利亚分院所属的大气光学研究所最近研制了一种激光灯塔,用于缓和航运交通繁忙海区的导航工作。传统灯塔灯光的能见度受天气状况的影响,而激光灯塔具有高度的定向性,它的能见度基本上不受天气条件的限制。其次,激光窄束具有反差守恒效应。激光反差(即信号源直接辐射的亮度与日光漫射背景之间的差异)的 The Institute of Atmospheric Optics, the Siberian branch of the Soviet Academy of Sciences, recently developed a laser light tower to ease the navigation of sea areas with heavy shipping traffic. The visibility of traditional lighthouse lighting is affected by the weather conditions, while the laser lighthouse has a high degree of orientation, and its visibility is basically not limited by the weather conditions. Second, the laser narrow beam has the effect of contrast conservation. Laser contrast (ie, the difference between the brightness of the direct radiation of the signal source and the daylight diffuse background)