S
YSTEM DESCRIPTION
ProStar 335 Photodiode Array Detector
81
Figure 19 ProStar 335 optical system
Deuterium (UV) lamp assembly
The UV light source is a high output Deuterium lamp capable of
putting out light from 190 to 950 nm. The light intensity in the UV
range (< 450 nm) is much higher than in the visible range. The
lamp is pre-aligned at the factory so no alignment is needed in
the detector. When the lamp is turned on by the Varian Star or
Galaxie Chromatography Workstation, the detector goes through
its initialization sequence. It can be turned off and on through the
Workstation. The light generated by the lamp is focused through
a lens before entering the detector’s optical system.
The lamp assembly consists of the lamp bulb rigidly cemented
into its mounting bracket. Since no alignment procedures are
required, lamp replacement is easy to perform. See page 92 for
instructions on how to replace the UV lamp.
Flowcell
(9 x 0 shown)
Visible lamp
UV
lamp
Polychromator
assembly
Sample beam
Reference
beam
Focusing
lenses
