Pentaprism

Penta Prism is a five-sided prism, featuring two important properties. First the image is neither inverted nor reversed while it is deviated by 90°. Secondly, it is a constant deflection device, i.e. all the transmitted rays are deviated by the same exact 90°. Slight movement of the prism does not affect the true right angle.

Specifications:

Size range	a=b=c, 2 - 50mm
Size tolerance	0.1mm
Angle tolerance	3
Surface quality	60 / 40
Flatness	λ/2 per inch at 633nm
Bevel	0.1 - 0.3mm x 45
Material	BK7

The specifications will be different according to materials and dimensions.