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Proceedings Paper

Laser differential reflection-confocal lens thickness measurement
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Paper Abstract

A new laser differential reflection-confocal lens thickness measurement (DRCTM) method is proposed for the high-accuracy measurement of the lens thickness. DRCTM uses the test beam reflected from the lens first and last surface to determine the vertex positions of the two surfaces. Differential confocal technology is used to precisely identify the lens vertexes of the lens first and last surfaces, thereby enabling the precise measurement of the lens thickness. Compared with the existing measurement methods, DRCTM has high accuracy and strong anti-interference capability. Theoretical analysis and experimental results indicate that the DRCTM measurement error can be limited to 0.0015%.

Paper Details

Date Published: 8 October 2015
PDF: 7 pages
Proc. SPIE 9677, AOPC 2015: Optical Test, Measurement, and Equipment, 96771I (8 October 2015); doi: 10.1117/12.2199689
Show Author Affiliations
Nan Zhou, Beijing Institute of Technology (China)
Yun Wang, Beijing Institute of Technology (China)
Weiqian Zhao, Beijing Institute of Technology (China)
Lirong Qiu, Beijing Institute of Technology (China)
Lingfeng Chen, Beijing Institute of Technology (China)


Published in SPIE Proceedings Vol. 9677:
AOPC 2015: Optical Test, Measurement, and Equipment
Sen Han; Jonathan D. Ellis; Junpeng Guo; Yongcai Guo, Editor(s)

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