Penta Prism

An incident beam can be deviated 90° without inverting or reversing through a Penta prism. Penta prism has five sides, four of them polished. Two reflective sides are coated with metal or dielectric HR coating and these two sides can be blackened. The deviation angle of 90° will not be changed if the penta prism is slightly adjusted, this will be convenient to install it. It is widely used in laser level, alignment and optical tooling. The reflecting surfaces of this prism must be coated with a metallic or dielectric reflective coating.

Material BK7 Grade A optical glass
Dimension Tolerance ±0.2mm
90°Deviation Tolerance <30 arc seconds
Flatness λ/4@632.8nm
Surface Quality 60/40 scratch and dig
Coating Protected Aluminum reflective coating
Single Layer MgF2 AR coating at visible
Clear Aperture >90%
Chamfer Protective