focal property meaning in English

焦点性质
聚焦性能

The main research work is shown as below : 1 . summarize the focal property and aberration correcting ability of vls plane grating
主要研究内容： 1 、对平面变栅距光栅的聚焦特性和像差校正原理进行了较全面的综述。
These lenses consist of droplets that can alter their focal properties by changing shape in response to a voltage applied to a surface with which they are in contact
这类镜头由小水滴构成，改变施加在接触面的电压，就可改变水滴的形状，进而调整聚焦特性。
With the focal property and the aberration correcting ability , the varied line - space ( vls ) grating has been successfully used in the areas of astronomical physics , synchrotron radiation , fiber communications and so on . therefore , the ruling of the vls grating is one of the greatest significant tasks of the grating fabrication
变栅距光栅具有像差校正、自聚焦等优点，在天文物理学、同步辐射、光纤通信等领域有着重要的应用，因此，变栅距光栅的刻划技术一直是国际光栅制作领域的重大课题之一。