In situ control of industrial processes using laser light scattering and optical rotation

In situ control of industrial processes using laser light scattering and optical rotation
Engineering Village 2
? 2006 Elsevier Inc
Accession number: 06149794378

Title: In situ control of industrial processes using laser light scattering and optical rotation

Authors: Sanchez, Patricia Judith Mendoza; Echevarria, Daniel Lopez; Ruelas, Jorge Adalberto Huerta

Author affiliation: CICATA-IPN, Col. Alameda, Queretaro, 76040, Mexico

Serial title: Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated serial title: Proc SPIE Int Soc Opt Eng

Volume: v 6046

Monograph title: Fifth Symposium Optics in Industry

Publication year: 2006

Pages: p 60460K

Language: English

ISSN: 0277-786X


Document type: Conference article (CA)

Conference name: Fifth Symposium Optics in Industry

Conference date: Sep 8-9 2005

Conference location: Santiago de Queretaro, Mexico

Conference code: 66956

Sponsor: Centro de Investigacion y Desarrollo Confumex;Sociedad de Instrumentistas de America, Seccion Mexico, A.C.;National Instruments Mexico, S.A. de C.V.;Consejo de Ciencia y Tecnologia del Estado de Queretaro;Telefonos de Mexico, S.A de C.V.;et al.

Publisher: International Society for Optical Engineering, Bellingham WA, WA 98227-0010, United States

Abstract: 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.

Number of references: 23

Ei main heading: Light scattering

Ei controlled terms: Laser applications - Epitaxial growth - Molecular beam epitaxy - Surface roughness - Lubricants - Heating - Cooling

Uncontrolled terms: Laser light scattering - On-line control - Oil degradation - Sugar inversion - Protein denaturation - Sugar-protein interaction - Product quality

Ei classification codes: 741.1 Light/Optics - 744.9 Laser Applications - 802.3 Chemical Operations - 933.1.2 Crystal Growth - 931.3 Atomic & Molecular Physics - 931.2 Physical Properties of Gases, Liquids & Solids - 607.1 Lubricants - 642.1 Process Heating - 641.2 Heat Transfer

Treatment: Theoretical (THR); Experimental (EXP)

DOI: 10.1117/12.674447

Database: Compendex

Compilation and indexing terms, ? 2006 Elsevier Inc. All rights reserved
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