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