focal aperture

• 聚焦孔径

focal aperture的用法和样例：

例句

1. He stopped down the lens to a small aperture.
   他把镜头光圈孔径缩小。
2. The ACSL electrical-waveform generator consists of two striplines coupled through an aperture in their common ground plane.
   一个电脉冲整形器由两条通过其公共接地板上的耦合孔径发生耦合作用的带状传输线所组成的四端口装置。