The field identification according to the extinctionangle distinguish.
野外鉴定时可根据解理夹角相区分。
2
This paper presents a method of measuring the particle mean size and dust concentration by small angle near forward light scattering optics and the extinction theory.
本文综合前向小角光散理论及消光原理,提出一种测量粉尘平均粒径及粉尘浓度的光学方法。
3
And the effects of small changes of thin film thickness, incident angle and wavelength on extinction index of this polarizer are also studied.