•Be wary of the multiple definitions of the term "numerical aperture". It may use the sine of the marginal ray angle, the sine of the angle at which the intensity has fallen to 1/e2 (both definitions are used in different calculations in OpticStudio, as we shall see) or the sine of the angle at which the intensity has fallen to 1% of peak, as used by Corning. Definitions matter!
frantic0722
2017-02-08 15:24
以光强最大值处对应的角度为0度，光强降到1%时与光强最大时的夹角假设为a（可参阅高斯光束表达式），n*sin（a）=0.09；应该是这么算出来的，楼主再想想。 f^hJA Z
