Retarder Plates– Quart & Half

Luvy, I think we need to slow things down…

https://upload.wikimedia.org/wikipedia/commons/6/68/Waveplate.png

Optical Axis — Retarder Plates Diagram



A waveplate or retarder is an optical device that alters the polarization state of a light wave travelling through it. Two common types of waveplates are the half-wave plate…
https://en.wikipedia.org/wiki/Waveplate
https://i2.wp.com/www.thorlabs.de/images/xlarge/TTN005095-xl.jpg

Zero retarder Cylinder
(thorlabs)

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