查询词典 Lens

This article outlines the progress of ancient Chinese lenses from the Pre-Qin Period to the Five Dynasties, and discusses mainly two arguments: First, the"yangsui" recorded and narrated in Lun Heng by Wang Chong of Eastern Han Dynasty may be a plano-convex glass lens; secondly, the"four mirrors" recorded and narrated in Tanzi Hua Shu by Tan Qiao of Southern Tang Dynasty may be a plano-convex lens, a biconvex lens, a transparent planeparallel plate and a concave-convex lens respectively, but what kind of tra...

本文概述了中国古代透镜从先秦到五代的发展进程，着重从古代文献和出土文物的研究出发，结合中国古代社会经济发展水平，论证了东汉王充《论衡》中记述的阳燧可能是玻璃平凸透镜；论证了南唐谭峭的《谭子化书》中记述的"四镜"可能是平凸透镜、双凸透镜、平光镜和凹凸透镜。作者认为《谭子化书》"四镜"段可能实际上是对中国古代透镜发展的阶段性总结。

I'll recommend you to take a look at the website: Zenni Optical if your answer is Yes! Do not hesitate to visit it right now,You'll get to know you find the Great Discovery: Zenni Optical .ZenniOptical.com Sells Stylish Prescription Glasses Online. You will find huge selection of frames, with single vision lens, sunsensorlens, tinted suglasses lens, bifocal lens and progressive lens.

如果是的话，我推荐这个网站给你： Zenni Optical ZenniOptical.com 为你在线出售时髦，漂亮的的眼镜，从框架到镜片都提供各种不同的样式，上面有一些样式的图片，你可以看一下。

The said Martinez stretcher comprises concave spherical reflecting lens, plane reflecting lens and grating. The said compressor comprises plane reflecting lens, inner right angle reflecting lens and grating, which is characterized by the following: the grating fringe density of the stretcher is larger than that of the compressor.

所述的马丁内兹展宽器由凹球面反射镜、平面反射镜和光栅组成；所述的压缩器由平面反射镜、内直角形反射镜和光栅组成，其特征在于，展宽器的光栅条纹密度大于压缩器的光栅条纹密度；展宽器中的凹球面反射镜曲率半径位0.9～1.2米，光栅距凹球面反射镜的位置为凹球面反射镜曲率半径的1/3～1/2。

A dioptre is 1 divided by the focal length of the lens in centimetres. So a 1-dioptre lens has a focal length of 1m; a 2-dioptre lens has a focal length of 50cm; a 5D lens has a focal length of 20cm.

一屈光度是1除以该镜头焦距在厘米，所以一屈光度镜头焦距一米； 2屈光度镜头焦距50厘米； 1日5日镜头焦距二○厘米）。

Electrostatic forces are employed to manipulate the shape of liquid polymer lens. Surface profile distortions of the liquid lens result in its focus variability. UV light is employed to cure the liquid lens when its surface profile and focal spot are appropriate. Therefore, aspherical micro-lens with nice optical imaging and focusing abilities can be fabricated.

在实时进行光学检测的条件下，选择光固化材料，利用电场作用操控液滴透镜的面形实现变焦，在检测到较好的透镜面形和聚焦状态时，采用紫外光固化技术使液滴透镜固化，可制作具有良好光学成像和聚焦性能的非球面微透镜。

In the paper, on the basis of aggregation of previous studies, the development of optical technology and development trends at home and abroad are introduced, the principle of Fresnel lens is summarized. In accordance with its principle, circle equidistant steps Fresnel lens design is described. And on this basis, based on Fresnel design, also based on a continuous upward spiral of the plane curve concept, incidence surface and the backlight is set up to greet Archimedes - Fresnel lens design formula and the Second parabolic type Fresnel lens design formula, and on this basis, the advantages and disadvantages of the three designs is discussed.

本文在充分了解非球面光学技术在国内外的发展状况和趋势的基础上，同时从菲涅尔透镜的光学原理出发，并根据它的工作原理推导了圆环等距菲涅尔透镜的设计步骤，并在此基础上依据菲涅尔的设计思想，同时依据平面曲线的连续又呈螺旋的构思，推导出了迎光面和背光面阿基米德型菲涅尔透镜的设计公式和二次抛物面型菲涅尔透镜的设计公式，并在此基础上讨论了这三种设计各自的优缺点。

The optical pickup apparatus is provided with the objective lens for applying a light beam to the signal recording layer, a lens holder supporting the objective lens, and a coating layer formed on the disk side end face of the lens holder.

该光拾取装置包括物镜，使光束作用于信号记录层上；一透镜支架，用于支撑物镜；一涂层，它形成在透镜支架的盘侧端面上。

After the sound enters the movie the space and time structure, strengthened in the lens space and time relations, has enriched in the lens spatial level and the implication, simultaneously has also enriched between the lens and the lens space and time relations.

声音进入电影的时空结构后，加强了镜头内的时空关系，丰富了镜头内的空间层次和涵义，同时也丰富了镜头与镜头之间的时空关系。

The article focuses on Flash animation for the solution to problems, from a technical point of view can not be over-reliance on Flash, should make use of other technology-rich Flash animation of visual expression; to improve modeling capabilities, in shape not only the pursuit of "alternative" style ; grasp the movement of animation can not be over-reliance on Flash for several deformation, so monotonous movements, stiff; master the basic knowledge of lens design, the lens forms, master lens fluid connection method, grasp the lens space and time in order to improve Narrative, performance capacity.

文章重点探讨了针对Flash动画所存在问题的解决途径，从技术角度上不能过分依赖Flash，应该借助其它技术丰富Flash动画的视觉表现力；提高造型能力，在造型上不能仅仅追求"另类"的风格；把握动画运动规律，不能过分依赖Flash所提供的几种变形形式，使动作单调、生硬；掌握镜头设计基础知识，镜头表现形式，掌握镜头联接流畅的方法，把握镜头的空间与时间，以提高叙事、表现能力。

If you wish to set up a 2.40 rig using an A-lens (I am weary of typing out the phrase "anamorphic lens" so henceforth it shall be A-lens, or simply lens if the context is clear), the HC6800 has the capability of switching back and forth between 2.40 format movies or 16:9 material without moving the A-lens.

如果你想建立一个2.40钻机使用A -镜头（我厌倦输入4个字&变形镜头&，因此今后应是A镜头，或只是镜头如果上下文是明确的），该HC6800拥有2.40之间的交换格式的电影或16：9的材料不来回移动的A镜头的能力。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了