26 Agilent InfinityLab LC Series 1260 Infinity II FLD User Manual
1
Introduction to the Fluorescence Detector
Optical Unit
Reference System
A reference diode, located behind the flow cell, measures the excitation (EX)
light transmitted by the flow cell and corrects flash lamp fluctuations and
long-term intensity drift. Because of a non-linear output of the diode
(depending on the EX-wavelength), the measured data are normalized.
A diffuser is located in front of the reference diode (see Figure 7 on page 20).
This diffuser is made of quartz, reduces light and allows integral measurement
of the light.
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