7
U-CBE, U-CTB
4
PREPARATION AND MEASUREMENT
1. Position the specimen on the rotatable stage (U-SRP) and
focus on the specimen.
} Do not use the interference filter in this adjustment.
1. Rotate the stage until it attains the position of extinction
(position where the observed portion of the specimen looks
darkest).
2. Rotate the stage further by +45° and then clamp it.
3. Rotate the compensator knob and set the U-CBE or U-CTB
scale to position 30°.
4. Insert the U-CBE or U-CTB into the test plate adapter (U-TAD)
or polarization attachment (U-PA) as far as it will go.
Measuring
} If an interference filter (IF 546 or IF 550) is available, use of
this filter will improve measurement accuracy.
1
Adjusting the Extinction
4-1 Berek Compensator (U-CBE), Thick Berek Compensator (U-CTB)
2
Adjusting the Rotation Position
Fig. 2-1
Fig. 2-2
Interference
fringe
