Assembly of field diaphragm

To enable Koehler illumination when using condensers 0.53 S23 and 0.90 S1, a field diaphragm has to be assembled. Insert the field diaphragm module (18.1) into the mount (Fig. 18) from below. The diaphragm adjustment (18.2) should point in the direction of the tube. Secure with clamp screw (18.3).

Fig. 18Ê Ê Assembly of field diaphragm

1 Field diaphragm module, 2 Field diaphragm adjustment,

3 Clamp screw for securing the field diaphragm module

3

1

2

Fig. 19 Assembly of filters

1 Clamp screw for securing the filter holder

1

Assembly of filters and filter holder

The Leica DM IRB is equipped with a holder with spaces for 3 filters with 40 mm diameter.

The filters are already fitted into the holder at the factory. If you are retrofitting filters yourself, assemble as follows:

Slacken the clamp screws (Fig. 19.1) and remove the filter holder.

Put the filters into the holder (20).

Mount the filter holder onto the transmitted light illumination column and secure in posi- tion with the clamp screws.

Fig. 20 Assembly of filter holder for 3 filters

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Leica DM IRB manual Assembly of field diaphragm, Assembly of filters and filter holder