return

Development of interferometer for refractive index measurement of aqueous solution in a microfluidic chip


 
 
Contact   Geiser Martial
 
Title   Development of interferometer for refractive index measurement of aqueous solution in a microfluidic chip
 
Author(s)   Chen M. H., Geiser M., Truffer F., Song C. L.
 
References   Laser Physics Letters 10, Issue 4, April 2013, 45701-45701
 
Url   http://iopscience.iop.org/1612-202X/10/4/045701
 
Abstract   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.
 
 
 
 
HES-SO Valais-Wallis • Route du Rawyl 47 • CP • 1950 Sion 2
+41 27 606 85 11 • info@hevs.ch • www.hevs.ch