“光斑”造句
这一点是指其身体上的发
光斑或发光点.
This may show as luminescent blotches or spots on the body.
我们将它称为光束的 “
光斑尺寸 ”.
We will consequently refer to it as the beam'spot size ".
如果孔是圆形的, 那么在屏幕上出现一圆形
光斑.
If the aperture is circular, a circular spot of light appears on the screen.