Novel phase-shifting Savart Shearing Interferometer for Slope Contour Measurements

• Main Authors: Meng-Chi Wei, 魏孟琪
• Other Authors: Shyh-Tsong Lin
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/c899b5

碩士 === 國立臺北科技大學 === 光電工程系研究所 === 101 === An innovative shearing interferometer for slope contour measurements is proposed in this paper. It incorporates a novel fringe identification method and the five-step phase-shifting technique with the Savart shearing interferometer, so the phase map of the interferogram can be obtained without using the conventional phase-unwrapping technique, and the disadvantage (i.e., the error and noise propagation) due to this technique can therefore be eliminated. The measurement theory is first introduced, a setup comprising a light-source module, the Savart shearing interferometer, and an image processing system is then demonstrated, and the experimental results from the uses of the setup are finally presented. The results agree the feasibility of the proposed interferometer.