1) preselection of aperture
光圈预选
2) preset diaphragm
预选光阑
3) automatic pre-set aperture
自动预置光圈
4) diaphragm
[英]['daɪəfræm] [美]['daɪə'fræm]
光圈
1.
In making a video recording, the control of diaphragm is actually the control of the picture exposure and its shadow adjusting.
在摄像艺术创作中,对光圈的控制实际上是对画面曝光和产生不同影调的控制。
5) aperture
[英]['æpətʃə(r)] [美]['æpɚtʃɚ]
光圈
1.
In the television teaching material photography,the adjustment and the control of camera aperture is actually that of the picture exposure,and is also closely connected with the program art effect and the picture technology quality.
在电视教材拍摄中,对摄像机光圈的调节和控制实际是对画面曝光的调节和控制,无论与节目艺术效果还是与画面技术质量都紧密相关。
2.
This paper is the discussing about the aperture-coefficients of the Zoom Lens, the formula for the calculating is: F=f/d (where.
该论文是探讨变焦镜头的光圈系数 ,镜头的光圈系数的计算公式 :F=f/D(其中 :F为光圈系数 ,f 为镜头焦距 ,D为光圈开口直径 ) 。
3.
The functions, the hardware structure and the software structure of the test system for aperture performance are presented in this paper, and the designs of electric controller and optics coupling system are discussed in detail.
介绍了光圈性能测试控制系统的硬件组成和功能及软件的结构,对电气控制部分和光学耦合系统的设计进行了详细的讨论。
6) preconcentration
['pri:kɔnsen'treiʃən]
预选
1.
Design and Research of Dedusting in Jingtieshan Ore Preconcentration;
镜铁山矿矿石预选除尘设计及研究
2.
The fine crushing-wet preconcentration and grinding experiment is done on lean magnetite ore from Inner Mongolia area in China.
对内蒙古某贫磁铁矿进行细碎—湿式预选、预选粗精矿细磨后精选的试验研究,结果表明在采用细碎湿式预选抛尾和BKY型预选用磁选设备的情况下,可以实现低品位贫磁铁矿的低成本开发利用。
补充资料：光圈
摄影机等光学仪器的镜头中改变通光孔径的大小、调节进入光量的装置。也叫光孔、光阑。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条