14
15
· Operation with BX3-URA
When the illuminator is the BX3-URA, project the lighting section between
the poles (arc image) on the stage and adjust the positions of the poles
while observing the arc image position.
} Set the main switch of the power supply unit for lamp housing to “
I
” (ON)
and wait until the illumination light stops flickering and its brightness is
stabilized.
1. Close the shutter by sliding the shutter knob @ to position marked {.
2. Engage a mirror unit other than the ones for U-excitation (U-FUW, U-FUN,
U-FUNA) in the light path. You may use a fluorescence mirror unit for
U-excitation if you do not have other mirror units but, in this case, you
must always view the images through an anti glare plate.
3. Engage the 10X objective in the light path and place the U-CST centering
target on the stage.
4. While looking into the eyepieces, focus on the cross lines for reflected
light (white surface).
5. While looking into the eyepieces, adjust the stage to bring the center of
the cross lines for reflected light (on the white surface) on the center of
the field of view.
6. Turn the revolving nosepiece to engage the empty position (the objective
cap should be removed) in the light path.
7. Open the shutter by setting the shutter knob @ to position marked \.
8. While looking into the eyepieces, turn the collector lens focusing knob
| to project the arc image and mirror arc image on the U-CST (A in
Fig. 7).
} The mirror arc image refers to the arc image projected from the reflection
of the lighting section between the poles on the mirror built into the lamp
housing.
} If the poles are displaced excessively, the arc image is not projected. In
this case, try turning the burner centering knobs
2 3
.
9. Bring the arc image on the center of the right (or left) half of the field by
turning Turn the burner centering knobs
2 3
(B in Fig. 7).
} Turning the centering knob
2
moves the arc image in the vertical direction
and turning the centering knob
3
moves the arc image in the horizontal
direction.
Fig. 6
10. Insert the Allen screwdriver into the mirror focusing screw
5
(Fig. 8) on
the rear panel of the lamp housing and turn the screw to focus on the
mirror arc image (C in Fig. 7).
11. Overlay the arc image with the mirror arc image by turning the burner
centering knobs
2 3
(D in Fig. 7).
} During observation, adjust the collector lens focusing knob | so that the
observed field is uniform.
Fig. 7
} This figure shows the images of the field of view
seen through the eyepieces during the mercury
burner centering. The actual views may differ from
these images depending on the condition of the
lamp housing.
A
B
C
D
1
4
3
2
