effective aperture meaning in Chinese

实效光圈
有效孔径（光学）
有效口径

Effective aperture of obejctive
物镜有效孔径
Photographic lenses - methods for the measurement of the effective aperture , f - number and relative aperture
摄影镜头.有效孔径光圈数和相对孔径的测量方法
A collinear acoustooptic - deflector of pronton - exchanged linbo3 channel wave - guide is studied . the theoretical analysis , structure design and device fabrication of linbo3 pronton - exchanged acoustooptic wave - guided deflector have been finished in this thesis . the width of wave - guide , the width , spacing , effective aperture and width of electrode of interdigital transduces have been theoretically analyzed and designed
本论文研究了一种质子交换linbo3沟道波导共线式声光偏转器,其特点是利用了沟道波导的横向约束,限制了声波的发散和衍射效应,使得窄孔径电极结构得以实现,从而增加了功率密度,使总的声场驱动功率降低。