Wedge Prisms(Risley prisms) has two plane faces slightly inclined to each other, the wedge apex angle. Usually the faces are inclined toward one another at a very small angles. It diverts light toward ...

A prism has a constant cross-section throughout its length. When the cross-section is a triangle, the prism is called a triangular prism. When the cross-section is a hexagon, the prism is called a ...