Olympus BHS-751P Instruction Manual - Page 13

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Olympus BHS-751P Instruction Manual
[
Light Path Selection
The trinocular tube is provided with a light
path selector knob
a
to direct the light to
the observation tube and/or to the photo
tube in 3 positions. (Fig.
9)
Knob position
Pushed in all the way
Pulled out halfway
Pulled o u t all the way
(V)
(C.V)
(C)
I
Amount of light
1
100% into binocular tube
1
20% into binocular tube
/
100% into photo tube
I
I
1
1
80% into photo tube
I
I
I
Application
"Crossed filter"
(1 ) Normal
1
Photomicrography
observation
/
observation
(2) Photomicrography
(focusing through
the binocular tube)
An indicator plate is provided at the knob port t o summarize the usage of the above table;
it can be consulted before operating the knob.
V:
Viewer (white letter)
C.V:
Camera and viewer (yellowish green letters)
C:
Camera (red letter)
The colors of the letters correspond with the color bands on the knob shaft.
C.
Use of the Orientation Plate
1)))
The analyzer built in the intermediate attachment should be adjusted for optimum extinc-
tion by means of the orientation plate provided in the following steps:
1) Bring the 10X objective into the light path, and make sure that the red dots
a
on both
intermediate attachment and microscope stand are aligned. (Fig. 10)
2) Set both polarizer and analyzer at position "0" to attain the "crossed filter" position
3 ) Place the orientation plate on the center of the stage.
4) Looking at the orientation plate through the eyepieces, rotate the stage (as you rotate the
stage, the orientation plate darkens and brightens alternately) until i t most darkens or attains
the extinction position; then, touch up the position ot the orientation plate manually so
that the lower edge (fiducial line) of the orientation plate nears the cross line
( X
axis).
5) Disengage the analyzer
@
from the light path, which makes the field of view bright.
6) Loosening the observation tube clamping screw
@
, rotate the observation tube slightly
until the fiducial line of the orientation plate is in parallel with the cross line; then, reclamp
the observation tube. (Fig. 10)
-
Fig.
' 1 0
0
Orientation
Plate
Cross line
parallel
Fiducial line