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Contact |
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Geiser Martial |
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Title |
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Development of interferometer for refractive index measurement of aqueous solution in a microfluidic chip |
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Author(s) |
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Chen M. H., Geiser M., Truffer F., Song C. L. |
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References |
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Laser Physics Letters 10, Issue 4, April 2013, 45701-45701 |
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Url |
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http://iopscience.iop.org/1612-202X/10/4/045701 |
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Abstract |
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This study presents the design and development of an interferometer for the measurement of the refractive index or concentration of a sub-microliter volume of aqueous solution in a microfluidic chip. This proposed interferometer is manifested by the successful measurement of the refractive index of a sugar–water solution, using a He–Ne laser as a light source and robust instrumentation for practical implementation. The measurement principle and the feasibility of the system are analyzed theoretically. The experimental device is constructed with a He–Ne laser, two lenses, two optical plates and a complementary metal oxide semiconductor detector. The refractive index change is determined by measuring the positional changes of the interference fringes. A refractive index change of 10-4 is inferred from the measured image data. |
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