Full-Field 3D Shape Measurement of Specular Object Having Discontinuous Surfaces

Zonghua Zhang, Shujun Huang, Nan Gao, Feng Gao, Xiangqian Jiang

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

5 Citations (Scopus)


This paper presents a novel Phase Measuring Deflectometry (PMD) method to measure specular objects having discontinuous surfaces. A mathematical model is established to directly relate the absolute phase and depth, instead of the phase and gradient. Based on the model, a hardware measuring system has been set up, which consists of a precise translating stage, a projector, a diffuser and a camera. The stage locates the projector and the diffuser together to a known position during measurement. By using the model-based and machine vision methods, system calibration is accomplished to provide the required parameters and conditions. The verification tests are given to evaluate the effectiveness of the developed system. 3D (Three-Dimensional) shapes of a concave mirror and a monolithic multi-mirror array having multiple specular surfaces have been measured. Experimental results show that the proposed method can obtain 3D shape of specular objects having discontinuous surfaces effectively.

Original languageEnglish
Title of host publicationFifth International Conference on Optical and Photonics Engineering
EditorsAnand Krishna Asundi
Place of PublicationWashington, USA
Number of pages11
ISBN (Electronic)9781510613737
ISBN (Print)9781510613720
Publication statusPublished - 13 Jun 2017
EventFifth International Conference on Optical and Photonic Engineering - , Singapore
Duration: 4 Apr 20177 Apr 2017
Conference number: 5
http://icopen.net/history.html (Link to Conference Details )

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


ConferenceFifth International Conference on Optical and Photonic Engineering
Abbreviated titleicOPEN 2017
Internet address


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