2I-10800-10
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Figure 6-1: Quest ATR - Front Cover Plate Removal
6.2. Synopti-Focal Mirror System
The Synopti-Focal mirror arrangement is shown in figure 5-2. For a right-
to-left beam direction, the beam strikes the mirrors in the following
sequence from source-side (S) to detector-side (D):
S, M1, M2, M3, M4, ATR Crystal, M5, M6, D
A left to right beam direction spectrometer inverts the order of the mirrors
between the source and detector. The mirrors M1, M2, M3 and
M6 are
flat, gold coated mirrors. (M6 is the slightly larger sized mirror). Mirrors
M4
and
M5 are aspheric, focusing gold coated mirrors. The angle of
incidence for the IR light beam when it interacts at the crystal/sample
interface surface is nominally set at 45°.
