Olympus BH-P Instrukcja obsługi - Strona 13

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4. Condenser Centration

B r ~ n g the

objective

10X

into the light path.

I f a specimen i s placed on the circular rotatable stage

without

mechanical stage it is recommended t o hold

the peripheries of the specimen with the stage clips

provided to the circular stage.

Swing in the condenser top lens, and b r ~ n g the specimen

into focus.

Stop down the field iris diaphrag~n w ~ t l i knurled ring

slightly blurred image of the field diaphragm can now

be seen in the eyepiece. (Fig.

3 )

Flg.

4) Move the condenser up and down to locus on the image of the field diaphragm.

I f the specimen slide is too thick, i t is sometimes impossible to obtain a sharply-focused

image.

While widening the diameter of the field progressively,

i i s e

the condenser centering

screws

(3)

to bring the diaphragm iniage Into the center of view. (Fig. 3 )

6) Push the analyzer

into the light path, and make sure

that both polarizer and analyzer are set at position

"0"

to attain the "Crossed filter" position. Then loosen the

clamping screw

(2)

o f the condenser. (Fig, 4)

7 )

Remove the speclmen o ~ ~ t

of the light path so that a

transparent area comes into the light path. Keeping the

polarizer at the "0" position, rotate the polarirer rota-

I + + -

& :

,--

j , i

tion ring @ until the optimum extinction is obtained,

/--:,

then clamp the ring. (Fig.

4 )

Fig.