The second image is obtained by rotating the cross-grating interferometer an angle about its axis of symmetry.
将光栅干涉仪绕其对称轴转过一角度，得到第二个像。
2
The interference pattern of a cross-grating interferometer is analyzed by the so-calledeffective source approach.
本文用有效光源法分析了正交光栅干涉仪的干涉图。
3
In the applications of fiber grating sensors, there exist cross sensitivity problems. It must be take various kinds of measures to compensate or distinguish them.