Bauernfeind prism

A Bauernfeind prism is a category of reflecting prisms and is used to deflect the beam by 45 ° to 60 ° to tilt depends on the design, without the image or rotate.

It is named after its inventor, the German geodesics Karl Maximilian von Bauernfeind, named.

The beam is reflected twice in the prism, wherein one of the reflections is steeper than the critical angle of total reflection, therefore, the prism requires a reflective coating to said surface.

A Bauernfeind prism with 45 ° beam deflection is also referred to as semi - pentagonal prism. A Bauernfeind prism can be combined with a Schmidt prism to a Schmidt- Pechan prism.

Applications

The Bauernfeind prism is used in microscopes and surveying instruments on the way to the eyepiece in order to make these devices more ergonomic.

Recent applications are glasses that turn the view angle either downward ( for relaxed reading or watching TV using sun glasses) or up ( for observing a sport climber with a fuse goggles).

Credentials

• Optics
• Reflection prism