LEAF: a fiber-optic fluorometer for field measurement of chlorophyll fluorescence

Piero Mazzinghi

doi:10.1117/12.47137

1 September 1991 LEAF: a fiber-optic fluorometer for field measurement of chlorophyll fluorescence

Piero Mazzinghi

Proceedings Volume 1510, Chemical and Medical Sensors; (1991) https://doi.org/10.1117/12.47137
Event: ECO4 (The Hague '91), 1991, The Hague, Netherlands

Abstract

This paper presents a portable, battery operated, instrument for measuring chlorophyll fluorescence on both peaks (685 and 720 nm) simultaneously. The instrument is named LEAFR (Laser Excited Automatic Fluorometer). The fluorescence is excited by a low power HeNe laser through a single optical fiber. The same fiber is also used to collect fluorescence, through a clip on probe. Fluorescence signals are detected by two photomultipliers with wavelengths selected by interference and long pass filters. An internal microprocessor controls the instrument and stores data in permanent RAM, for a later backup on an external PC. The preprocessing software allows real time display of parameters of physiological significance, as the F685/F730 ratio or fluorescence induction kinetics parameters. Some typical applications results are also briefly discussed.

Citation Download Citation

Piero Mazzinghi "LEAF: a fiber-optic fluorometer for field measurement of chlorophyll fluorescence", Proc. SPIE 1510, Chemical and Medical Sensors, (1 September 1991); https://doi.org/10.1117/12.47137

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