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Chapter 3
Individual Operations
124
Indiv
idua
l
Op
eratio
n
s
Manually opening and closing the shutter of a unit
Use a shutter open/close lever on the lower front of the
epi-fluorescence cube turret to open/close the shutter built in a
manual/intelligent epi-fluorescence cube turret.
Lever position [C]: Shutter closed.
Lever position [O]: Shutter open.
For details on operating the shutter in the manual HG
precentered fiber illuminator, see the instruction manual for the
illuminator.
1
2
A
λ
2
1
2
3
4
5
6
Opening/closing the shutter
16.4
Adjusting the Brightness of the Fluorescent Image (Using ND Filters and the Aperture
Diaphragm)
The brightness of the epi-fluorescence image can be adjusted by using the ND filters in the epi-fluorescence attachment
and the motorized HG precentered fiber illuminator. ND filters are used to adjust light intensity. The higher filter number,
the lower transmittance, and darker images are produced when placed in the optical path. ND filters do not affect the color
balance. Image brightness can also be adjusted by using the aperture diaphragm on the epi-fluorescence attachment.
ND filters in the epi-fluorescence attachment
The epi-fluorescence attachment has three ND filters (ND4,
ND8, and ND16) built in.
If the fluorescence is too strong, or if there is too much
decoloration of the specimen, push the ND filter slider into the
right side to bring the ND filter into the optical path and adjust
the brightness. (Excessive fluorescence may degrade the
contrast of the image.)
As shown below, you can combine these three filters to achieve
various levels of brightness.
ND4
ND8
ND16
Inserting/removing the ND filter
Light Reduction by Combined ND Filters of the Epi-fluorescence Attachment
Brightness
ND4
ND8
ND16
1 - - -
1/4
○
- -
1/8 -
○
-
1/16 - -
○
1/32
○
○
-
1/64
○
-
○
1/128 -
○
○
1/512
○
○
○
(-: Removed from the optical path,
○
: Placed into the optical path)
Shutter open/close lever
O: Open
C: Closed
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