Olympus GX41 Anleitung Handbuch - Seite 18

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Aperture iris

diaphragm image

Objective pupil

70 – 80%

30 – 20%

Fig. 24

Fig. 25

Using the Aperture Iris Diaphragm

}The aperture iris diaphragm determines the numerical aperture of the

illumination system. It enables you to adjust the depth of focus, contrast

and resolution according to your requirements.

· To confirm the aperture iris diaphragm, remove the eyepiece when nec-

essary, and then look into the eyepiece sleeve; you will see the field of

view as shown in Fig. 24. Now adjust the aperture iris diaphragm lever as

required.

Cleaning the Dustproof Glass

}Clean the dustproof glass @ periodically to prevent the view from deterio-

rating when the dustproof glass gets dirty.

1. To prepare for blowing dirt and dust away using an air blower, raise the

revolving nosepiece to the upper limit position.

2. Remove the stage center plate and one objective.

3. Through the stage center plate hole ², blow air toward the objective

mount screw hole ³ to blow dirt and dust away.

4. If the dustproof glass is still dirty, wipe using a cotton swab moistened

with a cleaning fluid. (To approach the dust glass, lower the revolving

nosepiece.)

(Fig. 24)

(Fig. 25)