Nikon OPTIPHOT-POL Anleitung Handbuch - Seite 10

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Rotate the stage about

1800,

and the target

is displaced from

the center of the cross

lines. Move the objective using the center-

ing tools so that the center of the cross

Iines comes to one half position

of the

displacement of the target. (F ig. 15)

Rotate

1800

Target-

A half

position

of the

displacement

Image of field

[~:a~~~~~~

~'\

)

,,>J

":/

Eyepiece

viewfield stop

Fig. 16

Fig. 15

•

Repeat the above procedure two or three

times, and the rotation

center of the stage

coincides with the cross Iines center .

•

Carry out centering for each objective.

Centering the Condenser Lens

1) Close the field

diaphragm

in the micro-

scope base to its smallest size by means of

the field diaphragm

control

ring. Rotate

the condenser

focus knob

to move the

condenser vertically

so that a sharp image

of the field diaphragm

is formed on the

specimen surface.

Bring the field

diaphragm

image to the

center of the field of view by means of

the condenser centering screws.

(Fig.

16-1IJ)

3) Change over to the objective

40 x,

and

adjust

the

field

diaphragm

so that

the

image of the diaphragm is about the same

as the eyepiece viewfield stop, as shown in

Fig.

16-~.

If not centered, use the con-

denser centering screws again.