DIN EN 60793-1-43:2015 光纤.第1-43部分:测量方法和试验程序.数字孔径(IEC 60793-1-43-2015);德文版本EN 60793-1-43-2015
Optical fibres - Part 1-43: Measurement methods and test procedures - Numerical aperture measurement (IEC 60793-1-43:2015); German version EN 60793-1-43:2015