In the system of measuring Angle of phase interferometer, it is considered that the impact brought by baseline obliquity on phase can be eliminated by equivalent baseline from geometric projection.
In a measuring Angle of laser interferometer, the different positions of the cube-corner prism make the range of the measuring Angle of this instrument changed.
在激光测角干涉仪中，由于角锥棱镜在安置方位的不同，将导致该仪器角度测量范围的变化。
3
Generel mathematical expression on incidence Angle of major signal in such signals with the interferometer is presented.