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RQM/MEOPAR TReX Graduate Students & Postdoc Awards
The aim for TReX project is to develop a low cost fluorometer for the surface water and deep-water experiments measuring rhodamine B with at least a lower limit of detection of 1nM. The sensor contains two main components: an optical assembly design for effective light collection, and a signal processing firmware development in the form of a lock-in amplifier for reliable and precise measurements. The optical assembly consist of an LED light source, collimating lenses for focusing the excitation beam, a source filter (excitation filter), collimating lenses for collecting fluorescence, a filter for fluorescence (emission filter) and a light detector. This optical setup is not a traditional orthogonal setup; the light source being orthogonal to the detector, but rather a 65° setup such that all optics can be placed on one side of a flat interface between the sensor and the environment.
