Abstract
A novel compact dual-wavelength measurement system for absorbance chemical sensing incorporating digital lock-in amplifiers is reported. Its main innovation is the introduction of a reference wavelength to correct the possible non-specific optical changes of the system. The performance of the instrumentation has been tested on a laboratory setup and with integrated optical absorbance sensors.
Original language | English |
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Pages (from-to) | 3443-3450 |
Number of pages | 8 |
Journal | Measurement Science and Technology |
Volume | 18 |
Issue number | 11 |
DOIs | |
Publication status | Published - 1 Nov 2007 |
Keywords
- Absorbance measurement
- Digital signal processor
- DSP
- Dual-wavelength measurement
- Lock-in amplification