Olympus U-CBE - Page 4

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Compensators are used for measuring the retardation in specimens with double refraction. Some
compensators* may also be used to enhance image contrast in polarized light observation. The following
table shows the retardation measuring range of the various compensators.
Measuring Range of Compensators
Compensator Name Measuring Range
Thick Berek (U-CTB)
0 -- 20
λ
Berek (U-CBE)
0 -- 3
λ
Quartz Wedge (U-CWE2)
1 -- 4
λ
* Senarmont Compensator (U-CSE)
0 -- 1
λ
* Brace-Köhler Compensator 1/10 λ (U-CBR1) 0 -- 1/10 λ
* Brace-Köhler Compensator 1/30
λ (U-CBR2) 0 -- 1/30 λ
λ = 546.1 nm (e-line)