Apr. 2017

Article Contents

Chinese Optics> 2017> 10(2): 267-279.

JI Yi, ZHANG Xue-jun, YUAN Ting, TAO Xiao-ping. Deflectometry measurement system for smart mobile devices[J]. Chinese Optics, 2017, 10(2): 267-279. doi: 10.3788/CO.20171002.0267

Citation:

JI Yi, ZHANG Xue-jun, YUAN Ting, TAO Xiao-ping. Deflectometry measurement system for smart mobile devices[J].Chinese Optics, 2017, 10(2): 267-279.doi:10.3788/CO.20171002.0267

JI Yi, ZHANG Xue-jun, YUAN Ting, TAO Xiao-ping. Deflectometry measurement system for smart mobile devices[J]. Chinese Optics, 2017, 10(2): 267-279. doi: 10.3788/CO.20171002.0267

Citation:

JI Yi, ZHANG Xue-jun, YUAN Ting, TAO Xiao-ping. Deflectometry measurement system for smart mobile devices[J].Chinese Optics, 2017, 10(2): 267-279.doi:10.3788/CO.20171002.0267

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Deflectometry measurement system for smart mobile devices

doi:10.3788/CO.20171002.0267

Key Laboratory of Optical System Advanced Manufacturing Technology, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China

Funds:

National Natural Science Foundation of China61036015

Received Date:17 Oct 2016
Rev Recd Date:02 Dec 2016
Publish Date:01 Apr 2017

Abstract

Abstract

Deflectometry is a three-dimension surface measurement method using simple equipment. In this paper, deflectometry based on portable devices such as smart phones and tablets is discussed. First, the calibration error and advantages of mobile devices are proposed. Then, according to analysis of the data and errors in experiments, a series of methods, such as camera non-linear calibration, improved phase shift algorithm, grid position calibration, automatic gain adjustment, are introduced to improve the measurement accuracy and stability. Finally, app launched in an iPad is used to test a 105 mm SiC workpiece. Experimental results indicate that the precision of global surface is 33 μm RMS with millimeter scale calibration accuracy. The error is mostly of low frequency, and the sensitivity is rather high in some areas. It proves that deflectometry integrated in smart tablet has the capability of achieving a measurement accuracy of tens of microns without other external equipment.
- shape measurement,
- optical testing,
- fringe reflection,
- portable device

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References (22)

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