The expression of opticaxialAngle and ray axial Angle on light wave plane can be obtained by using the curve equations of the wavefront of light wave and normal plane of light wave.
利用光波面和光波法线面的曲线方程，得出了光波面上光轴角和光线轴角的表达式。
2
Optic-axialAngle and refractive index are two important optic constants for the identification of transparent minerals.