27
IX73
Field iris
diaphragm
a
b
1
2
4
3
} The field iris diaphragm lever is used to adjust the diameter of the il-
lumination beam in accordance with the objective in use. Adjust the
diaphragm so that the field of view is circumscribed by the field iris
diaphragm to cut extra light and improve the contrast of images.
Move the field iris diaphragm lever
a
to the left or right to close or
open the diaphragm.
\ : Direction for opening the diaphragm
: Direction for closing the diaphragm
1
Loosen the two knob clamping screws
b
on the left adjustment
knob using the Allen screwdriver.
While holding the right adjustment knob not to rotate it, turning the
left adjustment knob counterclockwise (in the direction of the arrow)
decreases the rotation tension and clockwise increases it.
Rotating the right adjustment knob allows adjusting the tension of
the condenser height adjustment knob while checking it.
After adjustment, tighten the two knob clamping screws
b
se-
curely.
1
2
3
A mechanism returns the condenser back to the original position
easily after moving the condenser.
} To use the condenser refocusing stopper, refer to page 57 , and at-
tach the condenser refocusing stopper before use.
Bring the field diaphragm image into focus by rotating the condens-
er height adjustment knob.
Loosen the clamping screws of the stopper using the Allen screw-
driver provided with the microscope.
Push the top of the stopper downward so that the stopper contacts
the column securely.
Tighten the clamping screws of the stopper using the Allen screw-
driver provided with the microscope.
Rotating the condenser height adjustment knob beyond the
condenser height adjustment area with an excessive force could
damage the microscope. Pay careful attention when rotating it.
} If the manipulator is assembled to the column, the Allen screwdriver
provided with the microscope may not be used in some cases.
1
2
3
4
CAUTION
3
Using the Field Iris Diaphragm
4
Adjusting the Condenser Height Adjustment Knob Tension
5
Condenser refocusing stopper
2
