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 90deg will not be changed if the penta prism is slightly adjusted, this will be convenient to install it.
Penta prism 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.
Specifications
Material
BK7, UV Fused Silica
Dimension Tolerance
±0.1mm
90°Deviation Tolerance
30 arc seconds or better
Flatness
λ/4 @ 632.8nm or better
Surface Quality
60/40 scratch and dig or better
Coating
HR coating and AR coating
Clear Aperture
>90%
Chamfer
Protective
Half Penta Prism is exactly an half cut from Penta Prism which deviate the beam by 135°. The reflecting surface must be coated with reflective coating.
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