Because of the real data does not obtain from normal incidence, hence, the radius formula of Fresnel zone for non-zero incidence angle was derived.
根据实际资料都不见垂直入射这一事实，推导了非零入射角条件下非涅尔带半径公式。
2
On the basis of these conceptions, we advance the computational formula of the absolute incidence degree, which keep invariant of translational transformation, and give a computation example at last.