"焦距"是个多义词,它可以指焦距(衡量光聚集或发散的度量方式),焦距(《焦距》周渔、吴梦奇词曲作品),焦距(手机影视摄影编辑应用软体)。
焦距(Focal Length):这是一个衡量你手上的镜头能变焦多少的数值。简单来说,以50mm镜头为标准,数值低于50mm的时候会被认为这是一款广角镜头,超过...
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超焦距 [摄] hyperfocal distance ; hyperfocal ; pan-focus ; Hyperfokale Entfernung
焦距转换率 crop factor
后焦距 [摄] back focal length ; BFL ; back focal distance ; BACK FOCUS IN AIR
等效焦距 [光] equivalent focal length ; equivalent focal distance ; EF Equivalent Focal Length
焦距计 [光] focometer ; focal length gauge ; focometer focimeter
焦距长度 Focal length ; Focal distance length ; Lens focal length
长焦距镜头 Telephoto lens ; tele lens ; long focal lengh lenses ; [光] [摄] long-focus lens
双焦距透镜 bifocal lens
可变焦距透镜 zoomar lens ; variable focal length lens ; vari-focal lens
A kind of new way to measure optical system focal distance automatically is proposed, which is based on CCD optical-electrical method and digital image processing method.
提出了一种基于CCD光电法和数字图像处理方法自动测量光学系统焦距的新方法。
参考来源 - 基于CCD的光学系统焦距自动测量技术Using Gradual Aberration optimization Method, a 6m focal length, 600mm aperture off-axis aspherical optical system is successfully aligned.
采用像差逐项优化法,成功地装调了焦距为6m 口径600 mm 的离轴三反镜光学系统。
参考来源 - 三反射镜光学系统的计算机辅助装调技术研究A new method of microlens focal length measurement by rotation method based on grating diffraction is introduced.
介绍了一种利用光栅的多缝衍射分光代替传统转角法的角度测量的微透镜焦距测量方法。
参考来源 - 基于光栅多缝衍射的转角法测量微透镜焦距·2,447,543篇论文数据,部分数据来源于NoteExpress
圆锥角度直接受到焦距的控制。
这是指望远镜的焦距与其孔径的比值。
This is the ratio of the focal length of the telescope to its aperture.
你最好把照相机的焦距调整一下对准那些小船。
In other words, if you look too closely at a picture or if you stand too far away from it you don't see it clearly it's out of focus but if you achieve just the right distance from it, it comes into focus.
换句话说,如果你站得离一幅图画太近,或太远都无法看清它,它在焦距之外,但是如果你站在合适的位置上,焦距就对准了,画就清晰了。
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