14
U-CWE2
4-3 Quarts Wedge (U-CWE2)
Measuring
(Note) Do not use the interference filter (IF 546 or IF 550) in the following measurement.
Otherwise, the measurement will not be possible.
1
Specimen Placement
2
Adjusting the Rotation Position
1. Position the specimen on the rotatable stage (U-SRP) and focus on the specimen.
1. Rotate the stage until it attains the extinction position (where the observed portion of the specimen be-
comes dark).
2. Rotate the stage further by +45° and then clamp it.
3. Insert the U-CWE2 into the test plate adapter (U-TAD) or polarization attachment (U-PA). Slide the U-CWE2
and check whether there is a position where the specimen becomes dark. Note that, when the 4X or 10X
objective is used, the specimen does not become dark even in the right position unless the aperture iris
is stopped down. If the specimen cannot be made darker by stopping down the aperture iris, rotate the
stage by -90° and clamp it.
If the specimen does not become dark even after rotating the stage 90°, the retardation
of the specimen is outside the measurable 1-4
λ range, and measuring with the U-CWE2
is not possible. (See page 1)
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