Nikon LABOPHOT-POL Руководство по эксплуатации - Страница 17

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intermediate:

" P"

p lace:

/4 A

tint

plOl te

measurr:

ttu;

retardatio

n with the

accuracy

of the

ig.

23)

Fig.

)

Detecting of

extinction

position

Rotate the

stage

with

the

specImen under

the

crossed

Nicols

find

out

the d irection

where the specimen part for measurement

appears darkest.

2) Detecting of subtraction position

Rotate

the

stage 45

to br ing

the dia

gonal

position

rom

the

extinction

posit

ion

and

confir

that

the

interference

cot

or of

the

specimen part for

measurement

changes

toward the lower o

rder side

by inserting

1/4

tint

ate

into

the

opt ical

path

the

co lor changes toward

igher

order

side

, rota

te the

stage

rther

by 90

3) Measurement

Inserting the filter

to t he

filter

receptac

le,

replace the

1/4

& tint plate

the compen

sator

Ro tate

the

ana ly

zer

so as

the specimen part

for

measurement

becomes

dark

possi

ble.

Let the

ang le of the

above

analY7er rota·

tion

8°

then

the

retardati

A (nm) wi

obtained as fo llows

180

where

wave

length

the

light

used

for

the

measurement

When

the

filter GI F

used

546nm

t pl

ate t

hat

the

termed iate

tube

With

this

wedge

the

relarda

can roughly

mea

)

Detecting of extinction

Dete ct the position wh

part f or

measurement

rotating

the

stage

under

2) Detecting of subtraction

Rotate

the stage 45° to

gona

position

from

the

and

nfirm

tha

the in

the

specimen

part for me

toward the

lower orde

the quartz

wed

into th

If the

lor changes

rder side.

tate the st

3) Measurem ent

slid

ing the

quartz we

the

interference co

lor

The wedg

sliding

the

sPecimen part for m

under

the dark stripe,

interference co

r of th

the

specimen

but

und

stripe wi th the

Interfere

assume

the amount

If the

view

ield is

enti

specimen

around

the

restr

ict

the

illumination

except

around the

par

means o

the

fie ld

the specimen

away

the

then compare the

inter

the

cha