Fig. 1: Schematic and analysis of the underwater scene.
From: Circularly and elliptically polarized light under water and the Umov effect

a An illustration of the scene. The incident angle on the surface of the object is α. b Variation in the maximum DoCP vs. ψ (orange) and the maximum DoCP location vs. ψ (blue). c Variation in the DoLP vs. α and ψ. Note that the DoLP axis has a reverse direction. d Variation in the DoCP vs. α and ψ