12
STEINDORFF
®
Fig. 24
Fig. 25
Fig. 26
②
④
3.8.
Using the ND Filter Knob
The ND Filter is interlocked with brightfield (BF) light path switching
so it can be engaged or disengaged according to the mirror selector
lever
①
.The ND filter makes it possible to reduce the glare when
darkfield (DF)is switch to brightfield (BF).
Releasing interlocking
o
The ND filter knob has been interlocked at the factory. If
brightness is not enough during brightfield, DIC or other
observation, the interlocking can be released.
1.
Loosen the screw interlocking the ND filter by inserting the
Allen screwdriver into the hole
②
on the left side of the
reflected light illuminator.
2.
Now the interlocking is released and the ND filter knob (Fig.
17) is active. Pull the lever out to disengage the ND filter
from the light path.
3.9.
Using the Filters
o
Engage the optimum filter sliders for the purpose of
observation in the two filter insertion slots
④
. Be sure to
engage from the left side.
o
The first click position is the idle position and the second
click engages the filter in the light path.
Usable Filters
Applications
Color temperature
conversion filter
Turns the illumination light into daylight.
Used in general observations and color
photography.
Green filter
Enhanced contrast in monochrome
observation. Used in monochrome
photography.
Yellow filter
Contrast filter for observation of
semiconductor wafers
Frost filter
Reduces irregularity in the illumination field,
but also reduces the brightness
ND25
Adjusts the brightness of the light source.
(Transmittance: 25%)
ND6
Adjusts the brightness of the light source.
(Transmittance: 6%)
