It is a simple principle and higher measurement precision without complicated phase unwrapping and calibration procession, and can be used to measure the discontinuous and spatial isolation shape.
且原理简单，测量精度高，不需要复杂的相位展开和校准过程，特别适用于测量突变面形和空间离散面形。
2
Advantage of the approach is that the depth measurement range is expanded very much, it can be used to measure the profile of the deep or discontinuous surface.