20
BX53/51/41-P
Conoscopic image
6. To brighten and facilitate observation of the conoscopic image during
optical axis adjustment, rotate the analyzer slightly away from the position
of total extinction. (Fig. 26)
7. Insert the two provided centering wrenches ² into the centering holes
for the primary hole with the 20X or 10X objective on the nosepiece.
8. Manipulate the centering wrenches ² to bring the bright center portion
of the conoscopic image into the center of the field of view (Fig. 27)
9. Pull out the Bertrand lens knob to the OUT (¦) position. At this state,
center the condenser again, as in step 4 above.
²
Fig. 26
Fig. 27
