Themes > Science > Physics > Optics > Optical Instruments , Principles & Applications > Prism and Critical Angle > Right-angle prism, precision grade

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.
  • High transmission can be achieved, using the hypotenuse face in total internal reflection (TIR), with an antireflection coating on the entrance and exit faces.
  • The prism can be used as an internal or external mirror by applying a metallic coating on the hypotenuse.
  • We also offer standard grade for standard applications and ultra-precision grade right-angle prisms for critical applications.

General Specifications Schematic
  • Material: BK7 glass (index=1.5187)
  • Effective aperture: 90%
  • Dimension: +/-0.15mm
  • Surface flatness: 1/2 wave at 633nm
  • Angle tolerance: +/- 3 arc second.
  • Surface quality: 60/40 scratch/dig (max).
  • Perpendicularity of two sides to the polished surfaces: +/- 3 arc min
  • Coating: optional


Information provided by: http://www.optics-online.com