Olympus IX81 User Manual download pdf (Page 49)

IX81

Problem

Cause Remedy Page

Magnification selector knob is in an in-

termediate position.

c) Field of view is obscured or not

evenly illuminated.

Turn the knob as far as it will go or

engage it at the click stop according

to the observation method.

Revolving nosepiece or magnification

selector knob is in an intermediate posi-

tion.

Fully engage the revolving nosepiece

or knob at a click stop.

Condenser turret is set in an intermedi-

ate position.

Engage the condenser turret at a click

stop.

–

A filter is stopped in an intermediate po-

sition.

Set the filter at the appropriate posi-

tion.

d) Dirt or dust is visible in the field of

view.

The frost filter is not engaged. Engage the frost filter. 21

Dirt/dust on the specimen. Clean thoroughly.

Dirt/dust on the eyepieces.

Dirt/dust on a mirror unit.

Dirt/dust on the optical element.

Condenser is not correctly positioned

and the frosted filter or filter is focused.

Adjust the condenser height until the

field iris diaphragm image is formed

in the specimen plane.

e) Image glares.

Condenser is raised too high.

Lower to the proper position. 23

Aperture iris diaphragm is stopped down

too far.

Open the aperture iris diaphragm.

f ) Visibility of observed image is poor.

· Image is not sharp.

· Contrast is poor.

· Details are poorly visible.

Objective in use is not designed for UIS2/

UIS series.

Replace with an objective designed

for UIS2/UIS optics.

47/48

Correction collar on the objective

equipped with correction collar is not

adjusted.

While focusing, rotate the correction

collar to find the best position.

Front lens of the objective is dirty. Clean the objective. 5

Immersion oil is not being used with an

oil immersion objective.

Use immersion oil.

Immersion oil contains bubbles.

Remove bubbles. 27

Inappropriate slide or cover glass thick-

ness.

Replace with glass of appropriate

thickness.

–

Dirt/dust on glass components (con-

denser, objective, eyepieces, culture ves-

sels, etc.)

Clean thoroughly.

Ring slit and phase plate are not centered. Center them correctly. 31

Poor contrast during DIC observation.

Replace the plastic culture vessel with

a glass vessel.

32/33

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Olympus IX81 User Manual Page 49

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