Abstract
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 language | English |
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Title of host publication | Fifth International Conference on Optical and Photonics Engineering |
Editors | Anand Krishna Asundi |
Place of Publication | Washington, USA |
Publisher | SPIE |
Number of pages | 11 |
Volume | 10449 |
ISBN (Electronic) | 9781510613737 |
ISBN (Print) | 9781510613720 |
DOIs | |
Publication status | Published - 13 Jun 2017 |
Event | Fifth International Conference on Optical and Photonic Engineering - , Singapore Duration: 4 Apr 2017 → 7 Apr 2017 Conference number: 5 http://icopen.net/history.html (Link to Conference Details ) |
Publication series
Name | Proceedings of SPIE - The International Society for Optical Engineering |
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Publisher | SPIE |
Volume | 10449 |
ISSN (Print) | 0277-786X |
ISSN (Electronic) | 1996-756X |
Conference
Conference | Fifth International Conference on Optical and Photonic Engineering |
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Abbreviated title | icOPEN 2017 |
Country/Territory | Singapore |
Period | 4/04/17 → 7/04/17 |
Internet address |
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