52
Switching on the incident light source
The following incident light techniques are
described in the special supplementary manual
for DM LP (polarized light) and the DM LM
(material testing):
Brightfield BF, darkfield DF, polarized light Pol,
ICR interference contrast.
Switch on the lamp at the microscope (28.9) or
the external power unit. Hg lamps take a few
minutes to achieve their full intensity, and do not
ignite when hot!
Incident light techniques
Attention:
For microscopes with transmitted/incident light
switchover on the right side of the microscope
base (not illustrated): switch to incident light.
Move the filter system or reflector (Fig. 16, p. 18)
into the light path (39.2). Open the light trap
(39.9). Remove any diffusing screens* from the
light path.
Fig. 37
Lamphousing 106 (with 12 V 100 W halogen lamp)
1
Screw for opening the lamphousing,
2, 3
x/y lamp centration
(holes for Allen centering keys or 3 mm screwdriver,
4
Collector focusing,
5, 7
Clamp screw,
6
Filter holder
(intermediate piece)* for Ø 50 mm filters, pos. 3 and 4 do not
apply for Lamphousing 105/2 and 107 (not illustrated)
Fig. 38
Lamphousing 106
Reflection of the lamp filament, greatly schematized: in reality
the reflection is extremely low in contrast, the bright overlap
area is wider and less defined. With Lamphousing 106 z the
reflection is rotated by 90
°
,
→
Fig. 41c
Caution:
1
4
2
3
5
6 7
!
Make sure to adjust the light source
immediately, then form an image by one of
the following methods (Fig. 38 and 41), does
not apply for Lamphousing 105/2 and 107
(without centration).
Summary of Contents for DM L
Page 1: ...Leica DM L Instructions...
