Polarization analyzers and duplexers

Claim 1

A polarization analyzer comprising a first substantially non-absorbent dielectric prismatic layer defining, at one side, a first interface, and at the other side a second interface, said second interface determining with said first interface a summit angle of π2 - iB, iB being the Brewsterian angle value for a reflection against a diopter whose first medium is the medium surrounding said layer and second medium is the dielectric of the layer, a second substantially non-absorbent dielectric prismatic layer defining, at one side, a first interface and at the other side, a second and a third side disposed symmetrically to opposite sides of a plane perpendicular to said first interface so as to determine with said first interface two opposite angles equal to π/2 - i'B and a summit angle of 2i'B, i'B being the Brewsterian angle value for a reflection against a diopter whose first medium is the dielectric of the layer and second medium is that surrounding said layer, said layers having the same refractive index, and means for directing an incident wave at the angle iB against the first interface of the first layer, said layers being so joined that the second interface of the first layer is applied directly to the third interface of the second layer, the edge of the summit angle of said second layer being orthogonal with the edge of the summit angle of said first layer.