B6.4 - Liquid-based Sensor Systems Applying Novel Optofluidic Elements Fabricated by Micro-Stereolithography
- Event
- SENSOR+TEST Conferences 2009
2009-05-26 - 2009-05-28
Congress Center Nürnberg - Band
- Proceedings SENSOR 2009, Volume II
- Chapter
- B6 - Optical Sensors
- Author(s)
- M. Rosenauer, M. Vellekoop - Vienna University of Technology, Vienna, Austria
- Pages
- 107 - 11
- DOI
- 10.5162/sensor09/v2/b6.4
- ISBN
- 978-3-9810993-5-5
- Price
- free
Abstract
In this paper we present the design, simulation and measurement results of microfluidic optical sensors fabricated by single-layer micro-stereolithographic prototyping in a transparent photoresin. To improve the optical performance of liquid-based analysis systems in terms of excitation light guiding and focusing two novel optofluidic elements have been developed and integrated. We introduce a hydrodynamically adjustable fluidic lens with the ability to focus light three-dimensionally. The convex lens body is formed by the design of the fluid channels and the laminar flow rates of the input streams with different refractive indices and can be reconfigured continuously. The second optical device comprises a dynamic liquid-core/liquid-cladding waveguide which is used to excite the sample inspection region in an analysis channel. The guiding properties are defined by different core and cladding fluids and flow ratios. The fluidic waveguide allows the irradiated light to couple in the analytical channel for measurement purposes.