镜头的最大光圈直径和焦距的比数，叫做“有效孔径”，是表示镜头的最大通光量，也是镜头的最大口径。譬如，一只镜头的最大光圈直径是25毫米，焦距是50毫米，则有25:50=1:2。这就是说，镜头的焦距比口径长二倍，口径是焦距的1/2，这只镜头的有效孔径就是1:2，也作F/2或称F2。
... EDM instrument,电磁波测距仪 effective aperture,有效孔径 effective area,有效面积 ...
基于4个网页-相关网页
透镜有效孔径 effective lens aperture
物镜有效孔径 effective aperture of obejctive
有效孔径天线 real aperture antenna
有效孔径面积 effective area of aperture ; aperture effective area of
有效孔径时间 Effective Aperture Delay Time
最大有效孔径 maximum effective ; maximum effective aperture
有效孔径系数 coefficient of effective aperture
有效孔径分布函数 Effective Aperture Distribution Function
有效通光孔径 CA
·2,447,543篇论文数据，部分数据来源于NoteExpress
其实测有效孔径比可达到92。8%极大提高了微透镜阵列的聚光效率。
Its practicality effective aperture ratio has been improved to about92.8% consequently the concentration efficiency of microlens array is increased.
其实测有效孔径比可达到92.8%极大提高了微透镜阵列的聚光效率。
Its practicality effective aperture ratio has been improved to about92.8%, consequently the concentration efficiency of microlens array is increased.
其实测有效孔径比可达到92.8%，极大提高了微透镜阵列的聚光效率。
Its practicality effective aperture ratio has been improved to about 92.8%, consequently the concentration efficiency of microlens array is increased.
应用推荐