According to this model, the parallel misalignment and angular misalignment can be calculated so long as light spot coordinate of PSD at two discretionary angles is measured.
据此模型，只要测量出任意两个角度时光斑在PS D上的坐标，即可求出两轴的径向偏差和角度偏差。
For the question of fusing display of circular area on 3d model, a simple solution was put out, that used a spot light source to simulate the fusing effect of circular area display on 3d model.
针对虚拟仿真应用程序开发中的二维圆形区域与三维实体模型的融合显示问题，提出了一种简便的解决方案，即用聚光光源产生的光斑来模拟二维圆形区域在三维目标模型上的影印效果。
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