29
Incident light polariser L ICR/P, with whole-
wave compensator, reversible by 180° (38)
For use on the DMIRM with fixed vibration direc-
tion 0° = east-west.
The whole-wave compensator is fixed in the 45°
diagonal position and can be activated or deac-
tivated by turning the polariser slide over by 180°.
The polariser slide has bevelled edges on each
side for turning (38.2).
When the whole-wave compensator is activated,
an interference colour contrast with a fixed
retardation of one wavelength (1st order red) is
produced.
The polariser L ICR/P is also used for incident
light interference contrast in grey and colour
steps.
Insert the polariser slide into the polariser slot
(2.13) so that the engraving faces you. The polari-
ser slides have 2 notches which ensure the cor-
rect position in the light path (in or out).
n.b. If using high-intensity gas discharge lamps,
e.g. Xe 75 W, always insert a Pol protection filter
504079 in the lamphousing (39.1) to prevent
destruction of the polariser foil.
IRM ICR/P analyser (40)
For polarisation contrast and interference con-
trast.
Vibration direction 90° north-south rotatable by
+/- 9° with adjustment knob (40.1).
In combination with one of the above-mentioned
polarisers, the polarisation device is at a crossed
position.
Insert the analyser into the analyser slot with the
lettering upwards (1.18, 28.4). The analyser slide
has two notches for positioning in the light path
(in or out) (40.2).
Fig. 38
Incident light polariser L ICR/P with whole-wave com-
pensator
1
Polariser slide,
2
Bevelled edges on both sides
Fig. 39
Inserting the Pol protection filter
1
Pol protection filter
Fig. 40
IRM ICR/P analyser
1
Rotation adjustment knob,
2
Positioning notches
1
1
2
1
2
IRM ICR/P
