Right-angle prism is the most common type of prisms. It is used to
re-direct a beam of light at 90 degrees from the the incident direction or used
as a 180 beam retro-reflector. They are often coated with various optical
coatings to form cubic beam splitters and color separation cubes used in various
projection systems. Fused silica material offers
excellent UV transmittance, and it is more thermally stable than BK7.
- High transmission can be achieved, using the hypotenuse face in total
internal reflection (TIR), with an antireflection coating on the entrance and
- The prism can be used as an internal or external mirror
by applying a metallic coating on the hypotenuse.
||+/- 30 arc sec
||+/-3 arc min