Based on Lau effect in double grating, the focal distance of lens is measured.
根据计量光栅的特点，可以利用双光栅效应测量透镜焦距。
But only with the right focal distance and correct aperture could we get the true pictures.
只有我们调对了焦距，对准了光圈，才有可能得到真实的图像。
This may avoid remedy mistake because of the actual different focal distance brings from AS function.
这样可以避免AS功能启动是由于实际的焦距不同带来的矫正错误。
The authors have reported two methods for measuring the efficient focal distance of the laser rod lenses.
提出几种计算和测量激光棒负透镜等效焦距的方法。
Conjugate method is an accurate, simple and convenient method to measure the focal distance of thin convex lens.
共轭法是一种较为准确和简便的测量薄透镜焦距的方法。
Here the focal distance and both eyes parallax are absolute values which was measured by highly efficient sensor in one's eyes.
这就是我们两个眼球所测量得到的焦距和视差的绝对值。
An experimental investigation of the combination of a long focal distance Bragg-Fresnel lens with a bimorph mirror is described.
描述了对长焦距布拉格-菲涅耳透镜与可变曲率半径反射镜组合所做的实验研究。
In measuring the focal distance of lens, the experimental accuracy is often affected by the poor quality in the formation of images.
在测量透镜焦距时，往往由于成像质量差而影响实验的精度。
The picture would become clear lucidity while only adjusting good focal distance, this embodied the strength that the concentration has.
只有调整好焦距时，图像才会变得清晰明朗，这就体现了集中所具有的力量。
From the focal distance formula of thin lens, the convergence and divergence nature of each kind of thin lens are discussed in different media.
从薄透镜的焦距公式出发，讨论了各种透镜在不同介质中的会聚与发散性质。
Correct under the guiding of route we successfully design and have trial-produced the one kind of new long large-scale camera of focal distance.
在正确路线的指引下，我们成功地设计和试制了一种新型长焦距大型照相机。
This text is to compare Frensnel s zones plate with ordinary lens, on the axle point of light intension and focal distance as well as their difference in use.
当光通过菲涅耳半波带与普通透镜时，可发现在轴上点的光强、焦距以及用途上的不同。
Comparing to see the objects with glasses, with seeing them directly will become bigger, equal or small all depends on focal distance between glasses and eyes.
戴眼镜看物体与眼睛直接看物体时相比，物体究竟变小、等大还是变大，取决于眼镜与眼睛光心之距与眼睛的焦距。
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。
Moreover, applying the matrix method in the close axis optics leads directly to the expression of the focal distance of magnetic lens if the matrix is transmitted by the lens.
此外，应用类似于近轴光学中的矩阵方法，山磁透镜传输矩阵，直接导出了该磁透镜的焦距的表达式。
One major problem the researchers had to overcome was the fact that the human eye, with its minimum focal distance of several centimetres, cannot resolve objects on a contact lens.
研究人员必须解决的一个重要的问题是，人眼的最小焦距是几厘米，无法分辨出隐形眼镜上显示的物体。
Abstract: the rules of ganssian light beams extended by lens are disscussed firstey and the relation between the optimum waist extended and focal distance of the lens are found out.
文摘：首次讨论了用透镜来扩展高斯光束的一般规律，找出了最佳扩展束腰与透镜焦距的关系。
A slide lever on the bridge of the eyeglasses pushes the fluid forward or backward to alter the shape of that membrane, changing the focal distance depending on what the user is doing.
在眼镜横梁上的滑动控制杆推动流体向前或向后，以改变那层薄膜的形状，从而根据用户当前的动作来调整焦距。
This paper introduces a method for the measurement of stress of thin film. In this method a long focal distance microscope is used and deformation of the thin film on thin glass sheet is observed.
本文介绍一种利用长焦距显微镜观察玻璃薄片由镀膜淀积引起的形变来测量薄膜应力的方法。
The invention discloses a telescopic mechanism for mobile phone lens, which is object to resolve the defect that the prior mobile phone cannot use the lens telescoping to regulate the focal distance.
本发明公开了一种用于手机镜头的伸缩机构，旨在解决现有的手机不能通过镜头的伸缩来调节焦距之缺陷。
The first step in that plan is to distance the singer from Neverland, which, as a focal point for the trial, is indelibly linked with those charges in the eyes of the public.
这个计划的第一步是，将这名歌星和梦幻岛庄园分割开来。 这个庄园作为当年审判的焦点，在公众的眼里，永远和那些可怕的指控有着联系。
This is the distance (usually in mm.) from the lens (or primary mirror) to the point where the telescope is in focus (focal point).
就是从透镜(或者主反射镜)到焦点的距离，通常单位是毫米(mm)。
The first shot was taken with a short focal length (around 70mm) and from a relatively close distance and the background looked quite far away and small.
第一张焦距约70 mm，在相对近的距离拍摄，背景看起来很远而且很小。
The focal length you need depends on your distance from the burst and what you're trying to capture.
你所需要的焦距取决于你和被拍摄焰火间的距离，以及你想捕捉到怎样的画面。
Using a longer focal length and photographing stars far from the north star increase the distance stars will move across the image.
使用长焦镜头拍摄远离北极星的星星，会增加星星在相片上移动轨迹。
A lens is primarily defined by its focal length. Figure 4 illustrates the relationship between the focal length of the lens, field of view, sensor size, and working distance.
一个镜头的基础定义是其焦距，图4图示出镜头焦距，视野，感应器大小，和工作距离间之关系。
If you know the FOV, sensor size, and working distance, you can compute the focal length of the lens you need using the following formula.
如果你知道视野FOV，感应器大小，和工作距离，你能用以下之方程序去计算你所需之镜头的焦距。
It is a question of focal adjustment, of a certain distance that the inner eye thrills to surmount, and a certain contrast that the mind perceives with a gasp of perverse delight.
这是一个焦点调节的问题，是内在眼睛能颤栗着超越特定距离的问题。
Focal length: The distance between the centre of a lens and its principal focus.
焦距：镜头中心与其主焦点的距离。
Focal length: The distance between the centre of a lens and its principal focus.
焦距：镜头中心与其主焦点的距离。
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