Right Angle Prisms are the most popular of all prisms. They are used to deviate a beam 90 when used as shown or 180° when beam enters normal to the hypotenuse. Typical applications are: telescope diagonals, range finders, periscopes, cameras, bore sights, cube beam splitters, etc.

Specifications:
1) Size range: a=b 2 - 50mm
2) Size tolerance: 0.1mm
3) Angle tolerance: 3
4) Surface quality: 60 / 40
5) Flatness: λ/2 per inch at 633nm.
6) Bevel: 0.1 - 0.3mm x 45.
7) Materials: BK7, sapphire, fused silica
The specifications will be different according to materials and dimensions.