Pentagonal Prism

Pentagonal prism is one of the steering devices for beam fixing (90°). It serves two purposes: one is that the outgoing light turns the incident light at a certain Angle (90°), regardless of the incident Angle on the first side; For another, unlike a right-angle prism, the image produced is neither rotating nor specular reflection.

This prism is used in camera viewfinders. Pentagonal prisms are most suitable for image viewing systems or measuring instruments.