Abstract
We introduce a relatively simple and efficient optical technique to measure nanoscale displacement based on visibility variations of the Fresnel diffraction fringes from a two-dimensional phase step. In this paper we use our technique to measure electromechanical expansions by a thin piezoelectric ceramic and also thermal changes in the diameter of a tungsten wire. Early results provide convincing evidence that sensitivity up to a few nanometers can be achieved, and our technique has the potential to be used as a nanodisplacement probe.
© 2012 Optical Society of America
Full Article | PDF ArticleMore Like This
Shuangshuang Zhao, Changlun Hou, Jian Bai, Guoguang Yang, and Feng Tian
Appl. Opt. 50(10) 1413-1416 (2011)
Ju-Yi Lee, Ming-Pei Lu, Kun-Yi Lin, and Szu-Han Huang
Appl. Opt. 51(8) 1095-1100 (2012)
Benyong Chen, Liping Yan, Xiguo Yao, Tao Yang, Dacheng Li, Wenjun Dong, Chaorong Li, and Weihua Tang
Opt. Express 18(3) 3000-3010 (2010)