Most antennas are made in the shape of a dish to collect and reflect the radio waves to the sub reflector, in the same way as a curved mirror focuses visible light to one point.
大多数天线被制成碟形，用以收集和反射无线电波至亚反射器，就像曲面镜将可见光聚焦于一点一样。
2
An aspheric mirror can be tested just as simple as a spheric reflector. A conventional comparison of the measurement results with the design data is no more required.
对于非球面的检测不再象住常那样需要将测量值与计算值作比较，可以如同检测球面反射镜一样地简单。
3
It is found that there exist "amplification" and "self-compensation" of beam spread in the reflection from a mirror and a corner cube reflector, respectively.