Babinet–Soleil compensator

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Babinet compensator

The Babinet–Soleil compensator is a continuously variable, zero-order retarder. It consists of a birefringent wedge which is movable and another birefringent wedge which is fixed to a compensator plate. The orientation of the long axis of the wedges is perpendicular to the long axis of the compensator plate

Schematic view of a Babinet-Soleil compensator.


  • Iizuka, K (2002). Elements of Photonics, John Wiley & Sons.