Mounting The Nd Filters - Olympus BX-URA2 Instruction Manual

‡
Fig. 4
@
²
Fig. 5
Precise Centering of the 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 blind 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. Then peel off another couple of blind seals ‡. This exposes the mirror
arc image centering holes.
4. Adjust the centering of the mirror arc image using the Allen screwdriver
in these holes.
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Mounting 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 (with ND of 6 and 25) may be
individually inserted into filter insertion positions @ and/or ². Insert
the ND filters (U-25ND6-2 and/or U-25ND25-2, U-25ND50-2) 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.
· As you insert a filter, you will hear two clicks. At the first, the filter is at the
at an empty position, and at the second click the filter enters 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 positions in other positions than the
click positions for a long period of time.
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