The equations of caustic curve and its initial curve for a crack illuminated by an oblique incidentlightbeam in reflection arrangement were deduced using the space analytic geometry method.
When the initial power is equal to the critical power and lightbeam is incident at the beam waist, the elliptical Hermite-Gaussian spatial optical soliton is obtained.
当初始功率等于这一临界功率，光束从光腰处入射时，可得到椭圆厄米高斯空间光孤子。
3
According to the multi-beam interference occurred at the air gap for the polarizing light of Taylor prism, the transmitted light intensity depends on the incident Angle.