Agilent Technologies 1100 Series Reference Manual page 244

7 Introduction to the Fluorescence Detector
Figure 75
The radiation emitted by the lamp is dispersed and reflected by the excitation
monochromator grating onto the cell entrance slit.
The holographic concave grating is the main part of the monochromator, dispersing and
reflecting the incident light. The surface contains many minute grooves, 1200 of them
per millimeter. The grating carries a blaze to show improved performance in the visible
range.
Y
Figure 76
The geometry of the grooves is optimized to reflect almost all of the incident light, in
the 1
244 1100 Series FD Reference Manual
Lamp Energy Distribution (vendor data)
Mirror Assembly
st
order and disperse it with about 70% efficiency in the ultra-violet range. Most