Laser beam is propagated in the long range and diffused by the target in the solid angle n. So the real reflected optical energy is very weak.
激光束经过远距离传输,又经目标漫反射(在立体角π内都反射能量),实际返回的光能很弱。
参考来源 - 应用激光主动成像探测小暗目标的技术研究First of all, a new solid angle ray-tracing simulation with its three-dimension soundray model is proposed here.
首先,在理论上提出了一种新的声线模拟计算方法——立体角算法和相应的声线三维模型。
参考来源 - 厅堂音质设计中声线模拟立体角分频并行计算和应用研究·2,447,543篇论文数据，部分数据来源于NoteExpress
以上来源于: WordNet
N a geometric surface consisting of lines originating from a common point (the vertex) and passing through a closed curve or polygon: measured in steradians 立体角
From certain angles, the building's roof appears to float above the solid walls due to the narrow window that extends around the entire structure.
由于狭窄的窗口围绕整个结构延伸，从某些角度上看去，建筑物的屋顶似乎漂浮在坚实的墙壁上。
Base course treatment - the base course surface shall be smooth, solid and free from acute angles, floating dust or water, and go through good waterproof node processing as required in the design.
基层处理——基层表面应平整，坚实、无尖锐角、浮尘和明水，并按设计要求做好防水节点处理。
Due to the true solid state structure, all EL displays are inherently rugged and capable of handling wide temperature ranges and wide viewing angles.
场致发光显示器采用真正的固态结构，自身都坚固耐用，工作温度范围宽，视角大。
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