PEM200 User Manual
52
Figure A.3 Waveform for Half-wave Retardation
Note the flat top of the peaks. (Depending on the precise optical and electronic
configurations, this display might appear inverted.) This feature is very distinctive, and
by adjusting the retardation at half-wave to give the above waveform an accuracy of
better than 1% can be achieved. Figures A.4 and A.5 show waveforms for retardations
slightly less and slightly more than half-wave.
Figure A.4 Retardation 90% of Half-wave
