遮光

The front element is very wide making the lens slightly prone to ghosting and flaring, so keeping the hood on is mandatory.

它前面的广角部分使得该镜更易于拍摄和闪光，因此最好加上遮光罩。

The lens design incorporates an inner focusing system that prevents the front of the lens from rotating, making it particularly suitable for using circular polarizing filters and petal-shaped lens hoods.

该镜头的设计采用了内对焦系统，防止旋转镜头的前面，使特别是使用圆形偏振滤镜和花瓣形镜头遮光罩合适。

The stray light properties of the off-axis three-mirror telescope was analyzed and the basic design principles of the light shade and baffle vanes were presented,then the design of them was discussed.

分析了离轴三反射望远镜的杂散光特性，给出了遮光罩设计的基本原则并进行了初步的设计。

Thus, it is quite necessary to deeply investigate some related problems, such as stray light transfer, stray light analysis and calculation, stray light suppression method, and baffle system design, bi-directional reflectance distribution function of material surface, and accurate quantitative analysis and measurement of stray light performance of optical systems, like point source transmittance etc.

因此，对系统杂光的产生和传输、分析和计算、杂光抑制措施的采用与遮光系统的设计、材料表面BRDF以及系统杂光PST的定量测试等方面进行深入研究，是非常有必要的。

Although analytical formulas are not accurate enough to calculate stray light, they can help designer to distinctively understand the cause of formation of seven types of stray radiation and their influences, so as to adopt proper methods to restrain stray light and to optimize baffle design.

采用公式法计算系统杂光，精度虽然稍差，却可清楚地了解系统七种类型杂光的成因和影响，便于有针对性采取抑制措施，优化遮光设计。

But none of this seemed to matter to the short, long-faced, middle-aged man who was now behind the focusing cloth, clattering the shutter furiously in tenth-of-a-second bursts, to take her picture.

但是，那个身材短小长着一张长脸的中年男人却对此并不在意，他依然站在遮光布后以每秒10张的速度对着哈里斯一阵猛拍。

But none of this seemed to matter to the short, long-faced, middle-aged man who was now behind the focusing cloth, clattering the shutter furiously in tenth-of-a-second bursts, to take her picture.

但是这些丝毫没有阻止个子小小，长脸的中年男人的慧眼，瞧，他此刻正躲在遮光黑布后面，疯狂地按动快门，十分之一秒的脉冲，对她狂拍不止。

An observation deck – for staff and visitor use – has been created along the southern side of the building above the louvres.

建筑南侧立面的遮光板上方，一个观景平台依势而建。

Something, such as a window shade or a Venetian blind, that hinders vision or shuts out light.

遮光物：如窗帘或软百叶窗等能遮挡视线或挡住阳光的物体

There are some rules regarding sunscreens too.

这里有些关于遮光剂的使用方法。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。