Olympus U-25ND6 Anleitung Handbuch - Seite 17
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Fig. 5
Precise Centering of Mirror Arc Image
}The mirror arc image position has been adjusted and fixed at the factory.
Perform the centering of the mirror arc image after completing the center-
ing of the mercury burner and only when you want to make your adjust-
ments very strict and precise.
Note that, once this adjustment has been executed, the mirror can never
be returned to the same status as the factory shipment status.
1. Using a pair of tweezers, etc., peel off the two blink seals ... from the rear
of the lamp housing.
2. Loosen the screws below the seals using the Allen screwdriver. The mir-
ror is unclamped when these two screws are loosened.
3. The peel off another couple of blind seals †. This exposes the mirror arc
image centering holes.
4. Fit the Allen screwdriver in these holes and adjust the centering of the
mirror arc image.
8
Using the ND Filters
}Specimen color fading can be delayed by reducing the excitation light
intensity with ND filters. Use the ND filters as far as they do not hinder
observations.
· As necessary, up to two ND filters (U-25ND6, U-25ND25) may be indi-
vidually inserted into filter insertion slot @ and/or ². Insert the ND filters
with the marked side facing toward the observer.
The ND filters must be inserted in the correct orientation. Otherwise, the
ND filters may be damaged.
· When a filter(s) is not used, insert the dummy filter(s) ³ which has been
inserted at the factory when the system is delivered.
· The first click position is the empty position and the second click en-
gages the filter in the light path.
Note that the metallic filter frame will be very hot if you leave the filter
inserted for a long time while the mercury burner is on.
Do not leave the filter insertion position in other positions than the
click positions for a long period of time.
(Fig. 5)