Olympus BHTU - Observation Tube; Interpupillary Distance Adjustment; Diopter Adjustment; Light Path Selector

c. Observation Tube
1. Interpupillary Distance Adjustment
1} Click the lOX objective into position.
2) Looking through the eyepieces with both
eyes, adjust the interpupillary distance of
the binocular tube by adjusting the
knurled dovetail slides
CD of the right and
left eyepiece tubes with b9th hands until
perfect binocular vision is obtained. {Fig.
121
-
Fig. 12
2. Diopter Adjustment
1) Looking at the image through the right
eyepiece with your right eye, focus on
the specimen
with the fine adjustment
knobs.
21 Next, looking at the image through the
left eyepiece with your left eye, rotate
the
diopter adjustment ring CD to focus
on the specimen
without using the
coarSE and fine adjustment knobs..
(Fig.
131
3. Light Path Selection
1) The trinocular tube is provided with a
light path selector lever CD to direct the
light to the observation tube and/or to
the photo tube in 3 positions. (Fig. 141
Indicator Plate
~J ./11
tii - ,,~
&,~ :t \'i~
, 1lIII\,'
~ _f'~"
~ .~ -.:.$
[1 '
Fig. 14
CD
r
Lever Position
Pushed
in all the way
Pulled out: halfway Pulled out all the way
(VI
(C. 11.1
(C)
Amount
100% into binocular tube
20%
into binocular tube
100%
into photo tube
of light
80% into photo tube
CD Observation
CD Observation of exces-
Photom icrography
of
Applica·
sively bri~lht specimens
dark specimens
CV Dark specimens
~ Photomicrography (fo·
tion
cusing through the bi-
nocular tube)
An indicator plate is provided at the knob port to summarize the usage of the above table;
it can be consulted before operating the knob
V: Viewer (white letters)
CV: Camera & viewer (yellow-green letters)
C: Camera (red letters)
The colors of the letters correspond wi th the color bands on the knob shaft.
12