Rochon prisms are commercially available, but for many applications other polarisers are preferred.
2.
The Rochon prism was invented by and is named after S�narmont prisms the undeviated ray is ordinary on both sides of the interface.
3.
The S�narmont prism is similar in construction and action to the Rochon prism, as in both polarizers the ray that is not deflected is the o-ray after the internal interface, while the deflected ray is the e-ray.
4.
However, in the Rochon prism, it is the p-polarized ray that remains an o-ray on both sides of the interface, and is therefore not deflected, while the s-polarized ray changes from o-ray to e-ray and is therefore deflected.
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