S
YSTEM DESCRIPTION
ProStar 335 Photodiode Array Detector
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Optics hardware
The main optics components are the:
UV and visible source lamp assembly
Beam splitter
Flowcell assembly
Slit wheel
Polychromator (containing mirrors and diffraction grating)
Photodiode array detectors
The only user-serviceable optics components are the flowcell
and lamp assemblies. These assemblies are located behind the
panel on the front right side of the detector. To access the
flowcell and lamp assemblies, undo the captive screw in the top
left corner and remove the front panel. All other optical
components are pre-aligned and sealed and must not be
readjusted under any circumstance.
Optical path
The optical path of the ProStar 335 detector is as follows (for a
graphical representation, see Figure 18 and Figure 19).
Light coming from either source lamp is passed through a
focusing lens before hitting the beam splitter. Light from the
visible lamp passes through an attenuator to reduce the intensity
to an intensity comparable to the UV lamp. The beam splitter
divides the light into two equal paths of sample and reference.
The sample path then hits mirror N1 while the reference path hits
mirrors N2 and N3. The two beams then pass through the
flowcell and a slit wheel before entering the polychromator. The
slit helps determine the resolution of the detector optics.
Содержание ProStar 335
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