Right Angle Prism can be used to bend a beam by 90deg or 180deg, depending on which face is entrance face. Please refer to following image to see how it works. Now Union Optic can provide right angle prisms from 0.5mm to 50.8mm size. Special size can also be offered upon request.

Material: BK7, UV grade Fused Silica
Dimension Tolerance: +0.0/-0.2mm
Flatness: λ/4@632.8nm per 25mm range
Pyramidal Error: <3 arc minutes
Perpendicularity: <15 arc minutes
Surface Quality: 60/40scratch and dig
Clear Aperture: >90%
Chamfer: Protective
Coating: No coating, available