@inproceedings{5534e23923df4fe0a82ce8c782972495,
title = "Corneal surface reconstruction by using heterodyne Moir{\'e} method",
abstract = "In this paper, we propose a simple method for reconstructing the corneal surface profile by using the Talbot effect, projection moir{\'e} method, and heterodyne interferometry. A linear grating is obliquely illuminated by an expanding collimated light, and a self-image of this grating can be generated and projected on the corneal surface. The deformed grating fringes are imaged on the second grating to form the moir{\'e} fringes. If the first grating is moved with a constant velocity along the grating plane, a series of sampling points of the sinusoidal wave which behave like the heterodyne interferometric signal can be recorded by a CMOS camera. The phase distribution of the corneal surface then can be obtained with the IEEE 1241 least-square sine fitting algorithm and 2D phase unwrapping. Finally, the corneal surface profile can be reconstructed by substituting the phase distribution into special derived equation. This method provides the advantages of a simple optical setup, ease of operation, high stability, and high resolution.",
keywords = "Corneal surface profile, Talbot effect, heterodyne interferometry., projection moir{\'e}",
author = "Chang, {Wei Yao} and Chen, {Kun Huang} and Chen, {Der Chin} and Tseng, {Jung Kai} and Chen, {Shyan Tarng} and Sun, {Han Ying} and Chen, {Jing Heng} and Ken-Yuh Hsu",
year = "2013",
doi = "10.1117/12.2020423",
language = "English",
isbn = "9780819496089",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
publisher = "SPIE",
booktitle = "Optical Methods for Inspection, Characterization, and Imaging of Biomaterials",
address = "美國",
note = "Optical Methods for Inspection, Characterization, and Imaging of Biomaterials ; Conference date: 15-05-2013 Through 16-05-2013",
}