Leica DM IRB manual Assembly of IC condenser prisms, Condenser 0.90 S1 bottom up

Assembly of IC condenser prisms

The IC condenser prisms are assembled at the factory. The following steps are only necessary in case of a retrofit:

Remove the condenser disc (11.5) by slackening the screw (11.4) on the underneath of the condenser.

–Using the centring keys (12.1), slightly un- screw the two centring screws (10.11).

–IC condenser prisms can only be inserted into the large holes of the condenser disc which have guide grooves (10.2).

–Insert the IC condenser prisms in ascending order, e. g. K1, K2 and so that the mount fits under the spring (10.3) in the slot and the 2 guide cams engage in the grooves of the condenser disc (10.2).

–When the prisms are inserted, their identification code, e. g. K10, must be visible and pointing towards the centre of the disc (12.6 and 12.7).

–Using the centring keys, screw the centring screws back in until they no longer protrude over the outer edge of the disc. The prism is adjusted with the left centring screw only (see operation of ICT). The right centring screw must never restrict the adjustment range.

–Assemble the light rings and DF diaphragm if appropriate (see previous section).

–Insert the label plates (10.7) corresponding to the relevant IC condenser prism.

–Mark any empty holes with white labels.

–Remove any finger marks or dust on the prisms carefully.

–Put the condenser disc back in the condenser with the notches (10.6) facing upwards – towards the aperture diaphragm (6.3 and 8.4). Screw down the disc (11.4).

Fig. 11 Condenser 0.90 S1 (bottom up)

1 Condenser base, 2 Condenser top 0.90 S1, 3 Spacer ring, 4 Fixing screw for condenser disc, 5 Condenser disc

Fig. 12 6-position condenser disc, fully equipped

1 Centring keys for centring screws (in working position), 2 Label plates, 3, 4 Light rings for phase contrast, 5 Light ring for darkfield, 6, 7 IC condenser prisms, 8 Hole for brightfield

67 8

5 4 3

1 2 1

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