查询词典 Lens

As a singlet curved lens is impossible to correct all the five primary aberrations regardless it is made of PIMs or NIMs, the primaxy-aberration-free lens systems composed of two thin lenses or two thick lenses based on the use of NIMs are intentionally presented.

由于只靠单块曲面透镜是无法同时消除全部五种初级像差的，因而我们接着研究了由负折射率介质构造的能同时消除全部五种初级单色像差的双薄透镜组合系统和双厚透镜组合系统。

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A new way to change the parameters of non-diffracting beam using a popular sphere lens telescope system is proposed based on the relationship of lens transform between non-diffracting beam and ring light source.

本文提出一种用普通球面透镜望远系统来改变无衍射光束参数的新方法。

It also has a small lens at its tip, through which images are carried via a fiber optic lens system to a video monitor, which the surgeon and other staff can view in real time.

它也有一个小镜头，它的提示，通过这些图像进行通过光纤透镜系统，视频监控，这是外科医生和其他工作人员可以查看实时。

According to the relationship between temperature and the focal spot of lens antenna, the focal spot size of homemade millimeter wave dielectric lens antenna was measured by infrared temperature measurement technology. The experimental result, which was regard as the actual value, was achieved through analyses and calculations, and its designed value was corrected with it, then the exact radiation of millimeter wave was achieved.

摘 要：根据温度与透镜天线焦斑之间的对应关系，用红外热像测温方法对自行设计的毫米波介质透镜天线的焦斑进行了测量，经分析计算，得到了透镜天线焦斑的实测值，对透镜天线焦斑焦距的设计值进行了修正，实现了毫米波的定位定功率密度辐射。

Ray tracing method is used to calculate the spot pattern for different lens section plane,and then lens section plane of available dielectric material is optimized to reduce aberrations,so as to expand the field-of view.

采用射线追迹方法计算不同透镜剖面成像系统焦面上的点列图，对商用介质材料透镜通过优化剖面形状来减小像差从而获得视场扩大的效果。

The influence of the size of sound lens and the sound velocity in sound lens material and crude oil and rock stratum on the sphere of action is studied.

分析了声透镜尺寸及材料中的声速、原油及岩层中的声速对其传播距离的影响。

The sagittal depth ," S ",(also called sagitta , sagittal height or sag)is the perpendicular distance between the geometric center of the back lens surface and the diameter of the lens.

12矢深，& S &，，指镜片内曲面的几何学中心至线状直径之间的垂直距离。

I make it a point to always have both a short zoom lens and an intermediate telephoto lens with me when I am in the field.

我在野外，通常都带着1个短焦镜和一个中间透镜，使我获益菲浅。

Canon, Nikon, and other brands have a huge auto-focus lens group, from ultra-wide-angle to ultra-telephoto, from the macro to the soft focus, users can choose according to their own needs matching lens.

佳能、尼康等品牌都拥有庞大的自动对焦镜头群，从超广角到超长焦，从微距到柔焦，用户可以根据自己的需求选择配套镜头。

The system can be widely used in belt weighing and batching process control,etc.

介绍了基于智能模糊控制的嵌入式配料系统的设计方法，对模糊PID控制过程和系统调零作了重点的讨论，同时给出了PID控制的程序流程图和系统定长调零子程序。

"I dunno," she answered,"but if you show me aroun', I'll recognize it from the lighthouse just outside the porthole."

"我不知道，"她回答说，"如果你能带我转转，我能认出来的，因为灯塔就在舷窗外。"