透镜

A combination of two or more such pieces, sometimes with other optical devices such as prisms, used to form an image for viewing or photographing.Also called compound lens

镜头：由两片或更多的透镜组成的联合体，有些还要加上其它的光学仪器，如棱镜，用来成像以便观看或摄影也作 compound lens

We firstly studied the material feature in X-ray band. Base on this, we defined the diffractive screen function. Subsequently, by using diffraction theory, it studied the focus performance and transmission efficiency of X-ray compound lens.

1理论研究。首先研究了X射线波段的材料特性，并据此得出了物面的衍射屏函数，然后利用衍射理论研究了X射线组合透镜的聚焦性能和透射效率。

Some conventional optical antennas like hemispherical lens, compound parabolic concentrator, Cassegrain telescope were analyzed with the software of ZEMAX.

针对非视线大气光通信的需求，利用ZEMAX软件对半球透镜、复合抛物面聚光器和卡塞格伦望远镜等光学天线进行了性能分析。

Then the experimental setup for the focusing performance is described, and the focusing performance of the PMMA compound high-energy X-ray lens is tested under the inradiation of the 8 keV monochromatic X-ray.

最后给出8 keV单色X射线辐射下，PMMA材料X射线组合透镜的聚焦性能的测试结果，对实际测试结果进行了分析和讨论，得出结论，焦距等参量与理论计算结果基本吻合。

A 65mm FL910mm f/14 doublet achromatic lens was used.

甲65毫米双FL910mm f/14用消色差透镜。

Element achromatic lens with adjustable screw for collimation.

2元消色差透镜可调螺丝直。

A tube containing a convex ''.'achromatic'.'' lens at one end and a slit at the other with the slit at the focus of the lens;''.

一端包含一个凸起的消色差透镜另一端在镜头的中心有一个小切口的小管；''。

A tube containing a convex achromatic lens at one end and a ''.'slit'.'' at the other with the ''.'slit'.'' at the focus of the lens; light rays leave the ''.'slit'.'' as a ''.

一端包含一个凸起的消色差透镜另一端在镜头的中心有一个小切口的小管；光线通过小切口成为''。

On 24 June 1904 the issuing certificate for a new Zeiss trademark was issued; this logo was fashioned with "Carl Zeiss" within in the border of an achromatic doublet lens outline designed by a consultant Erich Kuithan b.

1904年6月24日，蔡司公司的新商标得到了确认。商标图案是一片消色差双合透镜外轮廓线，里面套着&Carl Zeiss&字母，由公司顾问埃瑞克库森（Erich Kuithan，1875年生，卒于1917年）设计。

Achromatic lens?

消色差透镜

I am sure after a few weeks of adaptation and familiarization I will have no difficulty in functioning on a daily basis in an English speaking society or in participating fully in graduate studies.

在大学的三年的学习生活不仅给予我自身的充实，更重要的是磨练和培养了我较强的自觉能力和严谨，踏实的作风以及不怕困难的精神，对未来充满了信心！

As the first volcanoes erupted, one of the gases that bellowed out was steam.

在第一批火山喷发时，喷出的气体之一就是水蒸汽。