B1.2 - Comparative analysis of PAM fluorometer detector circuits
- Event
- 22. GMA/ITG-Fachtagung Sensoren und Messsysteme 2024
2024-06-11 - 2024-06-12
Nürnberg - Band
- Vorträge
- Chapter
- B1 - Optische Messtechnik
- Author(s)
- S. Baghbani, S. Rupitsch - Universität Freiburg
- Pages
- 137 - 141
- DOI
- 10.5162/sensoren2024/B1.2
- ISBN
- 978-3-910600-01-0
- Price
- free
Abstract
Measuring the quantum yield’s efficiency of photosystem II allows to noninvasively monitor the photosynthetic activity in plants and indicate their health or stress. However, measuring with the pulse amplitude modulation (PAM) technique faces different challenges. The main challenge copes with finding the balance between sensitivity and dynamic range in the chlorophyll fluorescence detector circuit. Because when measurements take place in the field, the detector should reveal fluorescence changes by modulated light in a wide range of light intensities. This contribution presents two different electronic read-out circuits for the fluorescence detection: (i) transimpedance amplifiers, and (ii) switched integrators.