Abstract
The images projected by scanned laser pico-projectors (SLPPs) contain speckle noise caused by the reflection of the high coherent laser light source from the projection screen. A speckle pattern can be used to detect the concentration of liquid solution with nanoparticle. Three samples: solid solution, liquid solution, and collagen solution are tested. The experimental results show that the green laser within the SLPP provides a better sensitivity and resolution than the red or blue lasers. In solid solution measurement, different concentrations of nanoparticles embedded in a poly (methyl methacrylate) (PMMA) matrix are tested. In liquid solution measurement, different concentrations of nanoparticles dissolved in deionized water are also tested. Finally, the system shows ability to measure the collagen concentrations from 0.125 % to 0.025 %. Accordingly, the proposed system provides a viable, low-cost solution for high-sensitivity in biomedical, chemical and environmental applications.
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Acknowledgements
The financial support provided to this study by the National Science Council of Taiwan, R.O.C., under contract no. NSC 99-2221-E-006-034-MY3 is gratefully acknowledged. This work has been partially published in Chuang C-H et al. (2012) Relative two-dimensional nanoparticle concentration measurement based on scanned laser pico-projection. Sensors and Actuators B: Chemical 173: 281–287.
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© 2014 The Society for Experimental Mechanics, Inc.
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Chuang, CH., Sung, TW., Huang, CL., Lo, YL. (2014). Nanoparticle and Collagen Concentration Measurements Using Scanned Laser Pico-projection. In: Jin, H., Sciammarella, C., Yoshida, S., Lamberti, L. (eds) Advancement of Optical Methods in Experimental Mechanics, Volume 3. Conference Proceedings of the Society for Experimental Mechanics Series. Springer, Cham. https://doi.org/10.1007/978-3-319-00768-7_2
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DOI: https://doi.org/10.1007/978-3-319-00768-7_2
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