Detection of rapid induction kinetics with a new type of high-frequency modulated chlorophyll fluorometer

@article{Schreiber2004DetectionOR,
  title={Detection of rapid induction kinetics with a new type of high-frequency modulated chlorophyll fluorometer},
  author={Ulrich Schreiber},
  journal={Photosynthesis Research},
  year={2004},
  volume={9},
  pages={261-272}
}
A newly developed modulation fluorometer is described which operates with 1 μsec light pulses from a light-emitting diode (LED) at 100 KHz. Special amplification circuits assure a highly selective recording of pulse fluorescence signals against a vast background of non-modulated light. The system tolerates ratios of up to 1:107 between measuring light and actinic light. Thus it is possible to measure the “dark fluorescence yield” and record the kinetics of light-induced changes. A high time… 

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