System Description
39
From the optical filter the radiation passes through the entrance slit (Slit 1) of the
monochromator.
The radiation is dispersed at the grating to produce a spectrum. The rotational
position of the grating effectively selects a segment of the spectrum, reflecting this
segment through the exit slit (Slit 2) to mirror M3.
Figure 6 Optical Path for Lambda 25, 35, 45
*
replaced with a pre-monochromator in the Lambda 45
†
- selectable on the Lambda 35/45
Halogen
lamp
Deuterium
lamp
Filter wheel
M2*
M1
Slit 1
Slit 2
M5
Reference
Sample
M3
Detector
Lens
Lens
Detector
M4
Grating
(Monochromator)
Beam Splitter
M = Mirror
M1, M4, and M5 = Plane Mirror
M2 = Toroidal Mirror
M3 = Spherical Mirror
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