10 February 2006 In situ control of industrial processes using laser light scattering and optical rotation
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Proceedings Volume 6046, Fifth Symposium Optics in Industry; 60460K (2006) https://doi.org/10.1117/12.674447
Event: Fifth Symposium Optics in Industry, 2005, Santiago De Queretaro, Mexico
We present results of optical measurements in products or processes usually found in industrial processes, which can be used to control them. Laser light scattering was employed during semiconductor epitaxial growth by molecular beam epitaxy. With this technique, it was possible to determine growth rate, roughness and critical temperatures related to substrate degradation. With the same scattering technique, oil degradation as function of temperature was monitored for different automotive lubricants. Clear differences can be studied between monograde and multigrade oils. Optical rotation measurements as function of temperature were performed in apple juice in a pasteurization process like. Average variations related to optical rotation dependence of sugars were measured and monitored during heating and cooling process, finding a reversible behavior. As opposite behavior, sugar-protein solution was measured in a similar heating and cooling process. Final result showed a non-reversible behavior related to protein denaturation. Potential applications are discussed for metal-mechanic, electronic, food, and pharmaceutical industry. Future improvements in optical systems to make them more portable and easily implemented under typical industry conditions are mentioned.
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Patricia Judith Mendoza Sanchez, Patricia Judith Mendoza Sanchez, Daniel López Echevarria, Daniel López Echevarria, Jorge Adalberto Huerta Ruelas, Jorge Adalberto Huerta Ruelas, "In situ control of industrial processes using laser light scattering and optical rotation", Proc. SPIE 6046, Fifth Symposium Optics in Industry, 60460K (10 February 2006); doi: 10.1117/12.674447; https://doi.org/10.1117/12.674447

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