Penta Prisms

   A pentaprism is a five-sided reflecting prism used to deviate a beam of light by a constant 90°, even if the entry beam is not at 90° to the prism. The beam reflects inside the prism twice,
allowing the transmission of an image through a right angle without inverting it (that is, without changing the image's handedness) as an ordinary right-angle prism or mirror would.

   The deviation angle of 90° is thus independent of the orientation of the prism, making it especially important in applications in which the prism orientation cannot be precisely controlled.
Due to the geometry that total intermal refllection cannot be used, the reflecting surfaces must be coated with a metallic or dielectric coating. The standard Penta Prism reflecting surfaces
are coated with aluminum or enhanced aluminnue. The coated surfaces can be painted blck.

Penta Prism:

Capability:

Note: Custom sizes and wavelength range are available upon request.