Olympus U-25ND25 Руководство по эксплуатации - Страница 17

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Fig. 4

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.

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)