当折射棱镜折射角很小时，称之为光楔。

It is called the optical wedge, when the refraction Angle of the refracting prisms is tiny.

文中介绍了如何获得及同化GPS折射角资料的原理。

This paper introduces how to obtain and assimilate the GPS bending angle.

利用光子晶体的完全色散关系，研究了一维光子晶体中折射角与入射角之间的关系。

The relationship between refracting Angle and incident Angle in the one-dimensional photonic crystals was studied by means of complete dispersion relation.