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Abstract ：
A new structure for 3-D measurement was developed, based on projection Moiré. The method of changing light is used instead of applying mechanical structure for phase shift. It increases the measuring speed greatly (4-8 s). Two CCD are used to eliminate the reflection and the structures of vertical projecting and incline imaging are used to get the better light field. The system can measure large area (300 mm×300 mm). The precision of the system reaches 40 μm. Experiment shows that the method is effective and satisfactory.
Keyword ：
3-D inspection Changing light Phase shift Projection Moiré
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| GB/T 7714 | Wang, Xueli , Zhao, Hong , Li, Genqian et al. New 3-D measurement system based on projection Moiré [J]. | Guangxue Xuebao/Acta Optica Sinica , 2001 , 21 (10) : 1239-1244 . |
| MLA | Wang, Xueli et al. "New 3-D measurement system based on projection Moiré" . | Guangxue Xuebao/Acta Optica Sinica 21 . 10 (2001) : 1239-1244 . |
| APA | Wang, Xueli , Zhao, Hong , Li, Genqian , Tan, Yushan . New 3-D measurement system based on projection Moiré . | Guangxue Xuebao/Acta Optica Sinica , 2001 , 21 (10) , 1239-1244 . |
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Abstract ：
Shadow moire profilometry is a whole field non-contact 3-D measurement method. Generally there exist mechanical motion so that the measurement speed, life time and reliability are limited. A fast measurement method without mechanical motion has been realized by using the technique of optional multiple light sources. The method satisfies the need for the on-line measurement of BGA coplanarity.
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| GB/T 7714 | Song, Yuanhe , Li, Genqian , Zhao, Hong et al. Shadow moire technique by optional multiple light sources for BGA coplanarity measurement [J]. | Chinese Journal of Lasers B (English Edition) , 1999 , B8 (2) : 121-124 . |
| MLA | Song, Yuanhe et al. "Shadow moire technique by optional multiple light sources for BGA coplanarity measurement" . | Chinese Journal of Lasers B (English Edition) B8 . 2 (1999) : 121-124 . |
| APA | Song, Yuanhe , Li, Genqian , Zhao, Hong , Dong, Daqun , Jian, Yushan . Shadow moire technique by optional multiple light sources for BGA coplanarity measurement . | Chinese Journal of Lasers B (English Edition) , 1999 , B8 (2) , 121-124 . |
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Abstract ：
A new method of 360° turning three-dimensional shape measurement by using light sectioning and phase shifting techniques was presented. A sinusoidal light field was applied in the projected light stripe, and phase shifting technique was used to calculate the phase of light slit. The wrapped phase distribution of the slit was formed and the unwrapping process was made by using the height information based on the light sectioning method. The three-dimensional shape data of target can be produced according to the geometric relationship between phase and object height.
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| GB/T 7714 | Zhao, Hong , Song, Yuanhe , Li, Genqian et al. Novel 360° three-dimensional profilometry [J]. | Guangxue Xuebao/Acta Optica Sinica , 1999 , 19 (4) : 497-500 . |
| MLA | Zhao, Hong et al. "Novel 360° three-dimensional profilometry" . | Guangxue Xuebao/Acta Optica Sinica 19 . 4 (1999) : 497-500 . |
| APA | Zhao, Hong , Song, Yuanhe , Li, Genqian , Yue, Kaiduan , Chen, Wenyi , Tan, Yushan . Novel 360° three-dimensional profilometry . | Guangxue Xuebao/Acta Optica Sinica , 1999 , 19 (4) , 497-500 . |
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