The relatively rational parameters of grating are chosen according to the calculated results to make that when incidence angle or azimuth is varied, the light of different wave band will be reflected.

• 通过计算结果，找出相对合理的光栅参数，使得当入射光的入射角或方位角发生变化时，光栅反射出不同波段的光，即反射出不同颜色的光。