Sensor scheme and measuring principle
The CiS Research Institute starts developments on a miniaturized optical sensor for investigations of blood flow velocity in the skin. The sensor principle is based on the laser Doppler method. Here, elastic scattering at the moving blood components causes a shift of the light wavelength, which becomes measurable by coherent superposition with the excitation light. The minaturized component is based on the institute’s MORES™ technology, in which the light source (here a VCSEL) can be integrated directly into the sensor chip by 3D structuring of silicon.
As part of a research project, it is being investigated whether depth information on perfusion can be obtained in addition to the blood flow contour curve by combining different laser wavelengths in one sensor. Compared to commercially available solutions, the compact sensor operates completely without optical fibers. This should enable monitoring applications. In addition, it is being evaluated whether, in combination with an in-ear PPG sensor, access to new medically relevant parameters will be possible. Interested partners from industry are cordially invited to participate in the evaluation of the system.
The research and development work is funded by the German Federal Ministry of Economics and Technology (Funding code: VF140011).
Product and project presentations at:
COMPAMED, November 12-14, 2014, Düsseldorf, Hall 8a, Booth H23.1