Profile detection system for transparent parts' shaping

Yang Sun; Xin-zhu Sang; Chong-xiu Yu; Zhao Wu

doi:10.1117/12.2034229

19 September 2013 Profile detection system for transparent parts' shaping

Yang Sun, Xin-zhu Sang, Chong-xiu Yu, Zhao Wu

Proceedings Volume 8905, International Symposium on Photoelectronic Detection and Imaging 2013: Laser Sensing and Imaging and Applications; 89051G (2013) https://doi.org/10.1117/12.2034229
Event: ISPDI 2013 - Fifth International Symposium on Photoelectronic Detection and Imaging, 2013, Beijing, China

Abstract

An automatically detecting system for the shaping of transparent parts is designed and achieved. The system is based on detecting laser spots for profile shaping. During the transmission of the laser beam conveyed on the surface of transparent parts emitted from a He-Ne laser, the laser spot is captured by a CCD (Charge-coupled Device) camera. When the transparent part is shaped, the laser beam is blocked by parts and the laser spot decreases. Three key points on the surface of transparent part is monitored from three lasers, which realize the flexible forming of transparencies. Moreover, the inspection of changing laser spot is investigated, and the basis points of lasers and CCD cameras in horizontal and vertical direction are located by mechanical devices. The whole measurement for the profile detection of laser spot includes four steps: image capturing, image preprocessing, contour extracting and selecting, fitting and calculating. The changes of laser spot can be measured and the threshold value can be converted into the control of transparent parts’ shaping based on the mathematical method. Using the proposed method, a real transparent object is measured. Experimental results show that the proposed measurement system is effective and feasible.

Citation Download Citation

Yang Sun, Xin-zhu Sang, Chong-xiu Yu, and Zhao Wu "Profile detection system for transparent parts' shaping", Proc. SPIE 8905, International Symposium on Photoelectronic Detection and Imaging 2013: Laser Sensing and Imaging and Applications, 89051G (19 September 2013); https://doi.org/10.1117/12.2034229

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KEYWORDS

CCD cameras

Image processing

Image filtering

Charge-coupled devices

Inspection

Cameras

Digital filtering

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