Three-wave shearing interferometer based on spatial light modulator.
The use of a SLM for the three-wave lateral shearing interference is proposed, and an eight-step phase-shifting scheme is developed for extracting phase information from three-wave interferograms. The two-dimensional phase of object is reconstructed from two phase differences which are calculated from two orthogonal sheared interferograms. The flexibility of SLM can be fully utilized in the sense of dynamical controlling of the direction and amount of shear, as well as phase shift. The numerical simulation and optical experiment are carried out to demonstrate the feasibility and reliability of the proposed scheme.
Zhai
Si-Hong
SH
Nanjing National Laboratory of Microstructures and Department of physics, Nanjing University, Nanjing 210093, China.
Ding
Jianping
J
Chen
Jing
J
Fan
Ya-Xian
YX
Wang
Hui-Tian
HT