Figure 7.
Schematic view on the photo-fluorimeter core unit. The design allows the simultaneous recording of absorbance and fluorescence signals from a passing droplet. (A) Excitation laser diode; (B) fluorescence excitation filter; (C) photodiode for absorbance measurement; (D) Photosensor (avalanche diode) for the detection of fluorescence light; (E) fluorescence emission filter; (F) FEP-tube for guiding the droplet sequences; (G) optical beam forming elements. The excitation wavelength of the laser diode (A) and filters (B + E) must be adapted to the desired fluorescence wavelength.