Modeling the response features of optical sensors for oxygen: an overview

Andrew Mills

doi:10.1117/12.371296

23 November 1999 Modeling the response features of optical sensors for oxygen: an overview

Andrew Mills

Proceedings Volume 3856, Internal Standardization and Calibration Architectures for Chemical Sensors; (1999) https://doi.org/10.1117/12.371296
Event: Photonics East '99, 1999, Boston, MA, United States

Abstract

The response features of optical oxygen sensors based on luminescence quenching are complex and typically include downward curving Stern-Volmer plots and multi-exponential luminescence decays in the absence and presence of oxygen. The principle features and failings of some of the established models used to describe these response features are considered. A new model is introduced: 'a log-Gaussian distribution in (tau) ₀ and k_q,i ' model, or 'log- Gaussian' model for short. The key basic equations of this model are given and appear able to simulate the diverse response characteristics of many optical oxygen sensor. The model is used to fit the observed Stern Volmer plots and luminescence decays for two real sensors. The model appears to provide a reasonable physical basis for the very diverse response characteristics observed for optical oxygen sensors.

Citation Download Citation

Andrew Mills "Modeling the response features of optical sensors for oxygen: an overview", Proc. SPIE 3856, Internal Standardization and Calibration Architectures for Chemical Sensors, (23 November 1999); https://doi.org/10.1117/12.371296

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