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3-3 Centering mercury bulb
(1) Turn the nosepiece 1 to make blank hole into
light-path. Take off nosepiece cap when it has.
(Fig.18)
Figure 18
(2) Pull filter exchanging pole 3 to the middle position
for B1 observation.
(3) Turn adjusting pole 3 for view field diaphragm
by clock-wise to make the view field to largest. (Fig.
18).
(4) Set a white paper on stage and pull filter preventing
board 4 to middle position for observation.
(5) Adjust focusing lock-knob 5, vertical adjusting
screw 7 for mercury bulb, horizontal adjusting screw
6 for mercury bulb to make the bulb image on white
paper. (Fig.18, 19, 20a)
(6) Adjust focusing screw 9 for reflecting lens,
horizontal centering screw 8 for reflecting mirror,
vertical centering screw 10 for reflecting lens to
make the bulb reflected image on white paper. (Fig.
19, 20b)
(7) Adjust screw 8 and 10 to make the bulb image
and bulb reflected imagte symmetry. Adjust screw
10 to make
both images with same size. (Fig. 19, 20c)
(8) Adjust screw 6 to make the two images
superposition. (Fig. 19, 20a)
(9) Turn 10X objective into light-path and set slide
on stage for observation under B1. Find the image
and make it clear.
(10) Observe through eyepieces and adjust focusing
lock-knob 5 to make view field to best, then lock the
knob.
- Centering the bulb after it warmed up will be
more
precision.
- Adjust the vertical and horizontal screw for
bulb
image, the reflected image will also be moved.
- After replace the mercury bulb, it should be
re-center
the bulb.
3.0 OPERATION
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