22Installation3.7 Beam pathFigure 7 shows the beam path of the DR 3900.Figure 7 Beam path1 Halogen lamp 8 Splitter mirror2 Entrance slit 9 Reference element3 Grating 10 Cell compartment (2) for rectangular cells4 Grating angle indicator 11 Lens5 Exit slit 12 Reading element6 Lens 13 Cell compartment (1) for round cells7 Filter wheel
