光像

Although it was only off by 2.2 micrometres, this badly blurred the telescope's vision and made the scientists who had promised the world new images and science in exchange for $1.5 billion of public money the butt of jokes.

格瑞尼在2008年说伽利略观测到的星图其实是叫做艾利斑的衍射图像，艾利斑是指一束光通过一个小孔时得到的同心圆图像，就像一束星光通过一个小孔时呈现的图像。

Accordingly, as the major targets weighing the quality of the telescope,its luminous energy concentration degree directly influence the quality of the image of the celestial body. So many kinds of technique about the optical quality testing of telescope have came forth. Hartmann screen test is one of the most classical among them and it has become one of the main testing method on several large-scale telescopes in the world because of some strongpoints suchas briefness, visuality and easy handlment.The image through the350mm telescope of the Yunnan observatory has aberration in general, subsequently,the relative position of the primary mirrior has err when blooming and reinstalling .

因此，天文望远镜光能集中度作为衡量天文望远镜质量的重要指标，直接影响到所成天体像的质量好坏，所以就出现了多种天文望远镜光学质量检测方法，其中最经典的是哈特曼光栏法，它因简单、直观、操作方便等优点而成为世界上多台大型天文望远镜的重要质量检测方法之一。

The following results are found: Talbot self-imaging effect will appear when the full width at half-maximum of the incident short-pulsed light Δτ is within picoseconds and it will be gradually diminished at Δτ becomes small.

当激光脉冲的Δτ从皮秒逐渐减小时，塔尔博特自成像现象逐渐消失。而当激光脉冲的Δτ小于几十个飞秒时在第一个塔尔博特距离处光栅的衍射光强的最大值随Δτ的减小而减小。

The temple also included lightsaber training areas and an area that provided views of giant holographic star maps.

圣殿中也包括了光剑训练区，以及一个提供观看巨大的全像投影星系图的地方。

The ratio between geometric and crystallographic contrast can be modulated by the signal processing method.

对标准扫描光路，电子通道显微像的放大倍数是由电子束的扫描角范围控制，而几何衬度和结晶学衬度的比例可通过讯号处理方法来调节； 2。

I appraised the light, adjusted the lens setting and distance, locked a bulb in the flashgun

于是，我对好光，调好焦距，又安了一个闪光灯泡，然后举起像机，将这一场面在取景器中定格。

I appraise d the light, adjusted the lens setting and distance, locked a bulb in the flashgun, raised the camera and composed the scene in the viewfinder

于是，我对好光，调好焦距，又安了一个闪光灯泡，然后举起像机，将这一场面在取景器中定格。

I appraised the light, adjusted the lens setting and distance, locked a bulb in the flashgun, raised the camera and composed the scene in the viewfinder

于是，我对好光，调好焦距，又安了一个闪光灯泡，然后举起像机，将这一场面在取景器中定格。

The camera length of electron diffraction in transmisson electron microscopy is one of the main technical parameters in designing electron microscope and the electron diffraction analysis to microcrystal sample. According to Bragg law, the formula of calculating TEM electron diffraction camera length is derived from the research on the ray path of electron diffraction images in TEM and the comparison on electron diffraction with ordinary electronic diffractometer. The difference of physical significance of electron diffraction camera length between TEM and ordinary electronic diffractometer is discussed.

透射式电子显微镜(Transmisson Electron Microcopy， TEM)中的电子衍射相机长度，是电子显微镜设计和对微晶体样品进行电子衍射分析的主要技术参数之一依据布拉格定律，经对TEM中电子衍射成像光路的探讨与研究，并通过TEM与普通电子衍射仪的电子衍射的对比分析，导出了TEM电子衍射相机长度的精确计算公式，阐述了TEM和普通电子衍射仪的电子衍射相机长度所表征的物理意义的区别。

Fresnel lens is a lens branch, as it compared with other lens is small in size, light weight, the advantages of compact structure. At the same time, it will have no worse than other lens in Condenser and imaging performance. Therefore, it is widely used in various fields such as defense, aviation, space, industrial production and civilian.

菲涅尔透镜是透镜的一个分支，由于它同其他的透镜相比，具有体积小，重量轻，结构紧凑的优点，同时它拥有不逊于其它透镜的良好聚光性和成像性能，因此在国防、航空、空间、工业生产和民用等各个领域获得广泛的应用。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。