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Proceedings Paper

A novel optical approach based on speckle effect produced by VCSEL for tracking on glass surface
Author(s): Wei Huang; Huaqiao Gui; Liang Lv; Jing Xu; Fugui Yang; Hongbo Wang; Jianping Xie; Hai Ming
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Paper Abstract

The paper presents a novel optical approach to realize tracking on glass based on speckle effect produced by vertical-cavity surface-emitting laser (VCSEL). The range of incident angle has been investigated which shows incident angle in the range of 75 to 90 degrees is favorable to acquire a pure speckle field with purity better than 90%. In the system, nearly grazing angle of incidence 85 degrees is introduced, and big operating current of VCSEL and high gain of CCD are adopted to ensure signal detected. We analyze the cause of background contained in the image and remove them by placing a barrier between the laser diode and charge coupled device (CCD) and an infrared filter in front of CCD. After above-mentioned improvement of the system, a good linear dependence between displacement of speckle images and amount of glass translation is proved by experiment and the slope of the fitted line agrees well with theoretical predictions, the accuracy of tracking system is better than 4%.

Paper Details

Date Published: 8 January 2008
PDF: 7 pages
Proc. SPIE 6838, Optoelectronic Devices and Integration II, 683816 (8 January 2008); doi: 10.1117/12.754826
Show Author Affiliations
Wei Huang, Univ. of Science and Technology of China (China)
Huaqiao Gui, Univ. of Science and Technology of China (China)
Liang Lv, Univ. of Science and Technology of China (China)
Jing Xu, Univ. of Science and Technology of China (China)
Fugui Yang, Univ. of Science and Technology of China (China)
Hongbo Wang, Univ. of Science and Technology of China (China)
Jianping Xie, Univ. of Science and Technology of China (China)
Hai Ming, Univ. of Science and Technology of China (China)


Published in SPIE Proceedings Vol. 6838:
Optoelectronic Devices and Integration II
Xuping Zhang; Hai Ming; Maggie Yihong Chen, Editor(s)

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