College of Information and Communication Engineering, Harbin Engineering University, Harbin, Heilongjiang 150001, China.
Opt Lett. 2012 Aug 1;37(15):3213-5. doi: 10.1364/OL.37.003213.
A common-path interferometer is proposed with a tri-window. It is built using a 4f optical system with Ronchi ruling as a spatial filter. The input rectangular aperture is formed by three windows; the central window supports a phase object, and the other two are used for reference beams. Using an appropriate grating period relative to input aperture size, an interferogram containing three patterns can be obtained in the output plane. The object phase can then be reconstructed from the three patterns using just one interferogram. The experiments are carried out to demonstrate the feasibility and reliability of the proposed scheme.
提出了一种具有三窗口的共光路干涉仪。它是使用具有 Ronchi 光栅作为空间滤波器的 4f 光学系统构建的。输入矩形孔径由三个窗口形成；中央窗口支持相位物体，另外两个窗口用于参考光束。通过使用相对于输入孔径尺寸的适当光栅周期，可以在输出平面上获得包含三个图案的干涉图。然后，可以仅使用一个干涉图从三个图案中重建物体相位。实验验证了所提出方案的可行性和可靠性。
