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v .
OPTIONAL ACCESSORIES
3. Pin Hole Eyepiece
Replace one of the paired eyepieces with the pin hole eyepiece. Remove
the Bertrand lens out of the optical path, and the conoscopic image can
be observed overlapping the orthoscopic image through the binocular
observation. (Fig.26)
In the above simultaneous observation of both images, the conoscopic
image may be observed deviated from the orthoscopic view field center.
The conoscopic image observed through the pin hole eyepiece is
represented by the conoscopic light flux that covers the central part of
the orthoscopic view field to the extent of about 1/20.
Fig.26
4. Attachable Mechanical Stage
Mount the attachable mechanical stage on the circular graduated stage,
Inserting the two positioning pins on the bottom of the attachable stage
Into the two pin holes on the graduated stage surface. Tighten the
clamp screw using a screwdriver or coin. (Fig. 27)
The attachable mechanical stage with point counters (whose pitch are
O. 2mm or O. 3mm) is also available. The point counter can be replaced
by releasing the head of the point counter using a coin and removing the
milled part of the counter.
To release the click-stop of the point counter, release the click spring
nut.
Fig.27
32
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