D6.4 - Pressure Sensor for Remote Readout in Aqueous Environment
- AMA Conferences 2017
2017-05-30 - 2017-06-01
- Proceedings Sensor 2017
- D6 - Mechanical Sensors: Special Applications
- M. Gerken, T. Karrock - Christian-Albrechts-Universität zu Kiel (Germany)
- 527 - 529
Implantable intraocular pressure sensors are of high interest for early diagnosis of glaucoma. We propose a miniaturized, remote-readout, pressure-sensitive element that can be integrated into an artificial intraocular lens. A reference volume is sealed with a flexible photonic-crystal membrane. The optical spectrum reflected from this nanostructured waveguide depends on the incidence angle. A deformation of the membrane is calculated from an RGB image. Signal drift is a challenge with this type of membrane sensor. Here, we investigate the stability of the sensor for operation in air and in water. We identify gas leakage as the main reason of the signal drift, which is significantly reduced in an aqueous environment.