A corner cube retroreflector, also known as a CCR or trihedral prism, is an optical structure that consists of three adjacent, mutually-orthogonal plane-reflecting surfaces which form the corner of a ...

A prism is a solid shape that has the same cross-section all the way through. These three shapes are prisms. The first has a circular cross-section. The second has a rectangular cross-section.

There are five platonic solids, the tetrahedron, cube, octahedron, dodecahedron and icosahedron. A prism is a 3D shape with a constant polygon shaped cross-section. A prism is named by the shape ...

There are several basic types of optical prisms. Anamorphic prism pairs are used to correct the asymmetric, elliptical beams produced by laser diodes so that the beams are nearly circular in shape.