@inproceedings{82e6adc756ba4dd8bcb17ea894855cbc,
title = "Lens central thickness measurement by laser reflection-confocal technology",
abstract = "A new laser reflection-confocal thickness measurement (LRCTM) method is proposed for the reference lens central thickness calibration of the combined focal-length. LRCTM uses the reflector to reflect the convergent beam that come from the test lens to precisely identify the vertexes of test lens first and last surface, then uses ray tracing facet iterative algorithm to obtain lens central thickness. The test lens is put in the parallel light which makes its coaxality easier to adjust, and the optical path can be shortened with the reflector reflecting the convergent beam. LRCTM has high precision and concise structure, and it is suitable to be applied in the engineering. Preliminary experiments and analysis indicate that the relative measurement accuracy can be better than 0.03%.",
keywords = "laser confocal, lens central thickness, reflection-confocal, reflector",
author = "Lirong Qiu and Yongkui Guo and Weiqian Zhao and Yang Xiao",
note = "Publisher Copyright: {\textcopyright} COPYRIGHT 2015 SPIE.; 2015 International Conference on Optical Instruments and Technology: Optical Systems and Modern Optoelectronic Instruments, OIT 2015 ; Conference date: 17-05-2015 Through 19-05-2015",
year = "2015",
doi = "10.1117/12.2193394",
language = "English",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
publisher = "SPIE",
editor = "Kimio Tatsuno and Xiaodi Tan and Yongtian Wang",
booktitle = "2015 International Conference on Optical Instruments and Technology",
address = "United States",
}