1·Screen length, incline angle, and screen-aperture are the most important screen parameters, which directly relate to the capacity and efficiency of the screen.
筛面长度、倾角和筛孔孔径是最重要的筛面参数，与筛分机的处理能力和筛分效率有着直接的关系。
2·If the aperture is circular, a circular spot of light appears on the screen.
如果孔是圆形的，那么在屏幕上出现一圆形光斑。
3·This formula is not limited by the aperture radius and the distance from the screen and can be used as a theory of near field optics.
推导了圆孔衍射公式，该公式不受孔径大小和到屏距离的限制，可以作为近场光学的理论。
4·Is it true that there is no direct conversion between the aperture size (diameter) and meshes of silk screen?
丝网孔度(直径)和目之间是否无法直接换算？
5·A general diffraction formula for circular apertures is derived. This formula is not limited by the aperture radius and the distance from the screen and can be used as a theory of near field optics.
推导了圆孔衍射公式，该公式不受孔径大小和到屏距离的限制，可以作为近场光学的理论。