Transmission parameters such as numerical aperture and normalized frequency of the fabricated holey fibers have been measured and compared with theoretical values based on effective index method. 测量了拉制成的有孔光纤的数值孔径(NA)和归一化频率等传输参数,并基于有效折射率方法与理论值进行了比较。
A new method for measurement of numerical aperture of photonic crystal fibers 光子晶体光纤数值孔径(NA)测试的一种新方法
This is achieved by a high numerical aperture ( NA ) lens axicon that utilizes spherical aberration to duplicate the performance of an axicon and to create an extended focal line. 该方法采用了高数值孔径(NA)的旋转三透镜,这种透镜利用球面透镜来复制旋转三棱镜的性能和产生一个延长焦线。
We study the high numerical aperture focusing properties and typical applications of axially-symmetric polarized beams ( ASPBs ) with high polarization orders. 研究了高偏振级次轴对称偏振光束的高数值孔径(NA)聚焦特性及其典型应用。
Hence the value of high numerical aperture for such specimens. 因此对这标本需采用大数值孔径(NA)的物镜。