42
IFS 125M User Manual Bruker Optik GmbH
Description 4
4.10 Optical path
In standard operation, the parallel input beam is focused by an off-axis-paraboloidal
(OAP) mirror onto computer-controlled filter and aperture wheels. After passing the field
stop, the input beam is re-collimated onto the beamsplitter.
The optical filter and aperture are selected by the operator to optimize instrumental
response for the experimental conditions. After recombining the beam from the two arms
of the interferometer, a computer-controlled mirror stage selects between two detectors.
Alternatively, using an optional dichroic filter, the modulated beam can be split to two
detectors, thus enabling simultaneous collection from two data channels.
For calibration purposes, a mirror stage allows light from either a globar or tungsten
source to pass through a 10
cm gas cell and then follow the same optical path. The
selection between the calibration source and the collimated input is computer controlled.
Figure 4.10: IFS 125M - Optical path
To Next Page
Loading...
Need help?
General
