主焦点

以一个Ni软X射线波带片为例，用叠加圆环衍射场的方法分析了随机环带位置误差和宽度误差对主焦点效率和分辨率的影响；

The influence of random zone position and width error of zones on the main focus efficiency and resolution of a Ni soft X-ray zone plate is calculated .

计算了Ni软X射线波带片的随机环带位置误差及宽度误差对主焦点效率的影响；计算了SiO2/Ni硬X射线溅射切片波带片的两种材料的相互扩散和粗糙度对衍射效率的影响。

The influence of random zone position and width error on the efficiencies of a Ni soft X-ray zone plate was calculated , and the influence of interdiffusion and roughness on the efficiencies of a SiO_2 / Ni hard X-ray sputtered sliced zone plate was analyzed .

在主焦点的频率响应；低音技术要点

The frequency response at the principal focus ; Bass technology main point

在主焦点的频率响应；

The frequency response at the principal focus ;

焦距：镜头中心与其主焦点的距离。

Focal length : The distance between the centre of a lens and its principal focus .

这两个项目的主焦点是为生产车间装备强大而可靠的驱动，提升轧钢厂的生产力和可用性。

The principal focus of both projects is to equip the production facilities with powerful and reliable drives that will increase the productivity and availability of the rolling mills .

在构建阶段，技术风险大大降低，此时的主焦点问题是“我们在此阶段结束之前能够完成所有的必要任务吗？”

By the Construction phase , with the technical risks effectively mitigated , the principal focus turns to the question " Can we get all the work done by the end of the phase ?"

列阵透镜由多个列阵元拼接而成，用以改善主透镜焦点附近能量分布的均匀性。

Lens array consists of many array units , which can improve energy distribution uniformity around the focus of main lens .

许多回应这些事件的都是同一拨人，但当邦联者和奴隶主的雕像成为焦点时，他们的反应就非常不同。

Many of those responding to these events were the same people who responded very differently later when statues of Confederates and slaveholders were the focus .