80
85-102113-00:1
In the polychromator, the two light beams are directed onto the
entry collimating mirror and then onto the diffraction grating. The
dispersed light hits the exit collimating mirror before being
focused onto the dual photodiode detectors by mirrors N4 and
N5.
Figure 18 Optical ray trace diagram
UV lamp
Visible lamp
Slit wheel
Grating
Collimating mirrors
Detectors
N1
Beam
splitter
N2
N3
Visible
focusing
lens
UV focusing
lens
N4 N5