LEITZ DIALUX 20 - Changing the Lamp; Centring the Lamp

Changing the lamp
Release the knurled screw (24.7) of the
lamp mount. Pull the lamp mount (24.8)
out of the lamp housing. Remove the
defective lamp . Insert the new tungsten
halogen lamp before removing its pro-
tective cover (21.2). Replace the lamp
mount (21 . 1) and centre the lamp (Fig.
25) .
Fig. 21
Inserting the tungsten ha logen lamp
22637·514 A
Fig. 22
In serting the mou nt wit h lamp
16
Fully open the field diaphragm (1.18).
Insert the adjustment device in the filter
slot (Fig. 23).
Fig. 23
Adjustment device (with the diagrammatically re-
presented lamp adjustme nt).
Centring the lamp
(Lamp Housing 102 Z)
Turn the microscope sideways for
easier access to all centring screws of
the lamp housing.
Fig. 25
Image of the lamp filament and its mirror image
(diagrammatic representation)
I I ~
29229-514 A
F or m a sharp image
of the lamp filament
by turning the lamp
condenser knob (2).
29233-514 A
Adjust the mirror
horizont ally (5) so
that the
mirror image
of the lamp filament
also appears in sharp
focus.
29230-514 A
Move the lamp filament
image into the upper
half of the illuminated
field wit h the ce ntring
screw (1).
29234-514A
Set the mirr or image
with the two
ad just-
ment screws 4 and 6
so that
it coincides
with the primary image
of the lamp filament
in the l ower half.
Fig.
24
Lamp Housing 102 Z
29231-514 A
Adjust the lamp
filame nt image with
centring screw (3) so
that it occ upi es the
upper
illuminated
area co mplet el y.
29235·514 A
Set the two images
of the lamp filament
with the fine a dju st-
ment
of the lamp (1)
and mirror adjust ment
screws (4) so that
their sides exactly
coincide.
22 656·5 14 A
29232·514 A
By ad ju sting the two
centring screws
(4, 6)
capture the mirror
image of th e lamp
filament in the lower
half
of th e illumin-
ated area.
The two images
should n
ow just
coin cide in the
ce
ntr e.
17