Abstract
Phase-sensitive optical coherence elastography (PhS-OCE) is a high-sensitivity method for measuring internal displacement fields of semi-transparent materials. Although the displacement measurement sensitivity of PhS-OCE reaches sub-nanometer level, the dynamic range of the measured displacements is limited to micrometers due to displacement-induced speckle decorrelation. In this Letter, a displacement tracking method is developed to overcome this limitation. The method uses a subset-based match approach and takes the noise number of the phase difference map as the match quality, which can effectively track both axial and lateral displacements. For validation, the phase changes inside the polymer samples due to the displacements produced by the temperature/mechanical load changing were measured. The results show that many previously undetectable mechanical behaviors can be quantitatively detected after applying the proposed method.
© 2018 Optical Society of America
Full Article | PDF ArticleMore Like This
Bo Dong, Rui Wu, Zihao Ni, Shengli Xie, and Yulei Bai
Opt. Lett. 49(4) 867-870 (2024)
Gongpu Lan, Manmohan Singh, Kirill V. Larin, and Michael D. Twa
Biomed. Opt. Express 8(11) 5253-5266 (2017)
Chih-Hao Liu, Dmitry Nevozhay, Alexander Schill, Manmohan Singh, Susobhan Das, Achuth Nair, Zhaolong Han, Salavat Aglyamov, Kirill V. Larin, and Konstantin V. Sokolov
Opt. Lett. 43(9) 2006-2009 (2018)