Abstract
| Original language | English |
|---|---|
| Article number | 10293 |
| Pages (from-to) | 1-8 |
| Number of pages | 8 |
| Journal | Scientific Reports |
| Volume | 7 |
| Early online date | 31 Aug 2017 |
| DOIs | |
| Publication status | Published - 1 Dec 2017 |
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Full-field 3D shape measurement of discontinuous specular objects by direct phase measuring deflectometry. / Liu, Yue; Huang, Shujun; Zhang, Zonghua; Gao, Nan; Gao, Feng; Jiang, Xiangqian.
In: Scientific Reports, Vol. 7, 10293, 01.12.2017, p. 1-8.Research output: Contribution to journal › Article
TY - JOUR
T1 - Full-field 3D shape measurement of discontinuous specular objects by direct phase measuring deflectometry
AU - Liu, Yue
AU - Huang, Shujun
AU - Zhang, Zonghua
AU - Gao, Nan
AU - Gao, Feng
AU - Jiang, Xiangqian
PY - 2017/12/1
Y1 - 2017/12/1
N2 - With the advent of intelligent manufacturing, phase measuring deflectometry (PMD) has been widely studied for the measurement of the three-dimensional (3D) shape of specular objects. However, existing PMDs cannot measure objects having discontinuous specular surfaces. This paper presents a new direct PMD (DPMD) method that measures the full-field 3D shape of complicated specular objects. A mathematical model is derived to directly relate an absolute phase map to depth data, instead of the gradient. Two relevant parameters are calibrated using a machine vision-based method. On the basis of the derived model, a full-field 3D measuring system was developed. The accuracy of the system was evaluated using a mirror with known positions along an accurate translating stage. The 3D shape of a monolithic multi-mirror array having multiple specular surfaces was measured. Experimental results show that the proposed DPMD method can obtain the full-field 3D shape of specular objects having isolated and/or discontinuous surfaces accurately and effectively.
AB - With the advent of intelligent manufacturing, phase measuring deflectometry (PMD) has been widely studied for the measurement of the three-dimensional (3D) shape of specular objects. However, existing PMDs cannot measure objects having discontinuous specular surfaces. This paper presents a new direct PMD (DPMD) method that measures the full-field 3D shape of complicated specular objects. A mathematical model is derived to directly relate an absolute phase map to depth data, instead of the gradient. Two relevant parameters are calibrated using a machine vision-based method. On the basis of the derived model, a full-field 3D measuring system was developed. The accuracy of the system was evaluated using a mirror with known positions along an accurate translating stage. The 3D shape of a monolithic multi-mirror array having multiple specular surfaces was measured. Experimental results show that the proposed DPMD method can obtain the full-field 3D shape of specular objects having isolated and/or discontinuous surfaces accurately and effectively.
KW - Imaging and sensing
KW - Optical metrology
KW - Optical sensors
UR - https://www.nature.com/srep/
U2 - 10.1038/s41598-017-11014-5
DO - 10.1038/s41598-017-11014-5
M3 - Article
VL - 7
SP - 1
EP - 8
JO - Scientific Reports
JF - Scientific Reports
SN - 2045-2322
M1 - 10293
ER -