Abbe prism

In optics, an Abbe prism, named for its inventor, the German physicist Ernst Abbe, is a type of constant deviation dispersive prism similar to a Pellin-Broca prism.

~ ~ ~ ~ ~ ~ ~ ~ ~ ~

~ ~ ~ ~ ~ ~ ~ ~ ~ ~

The prism consist of a block of glass forming a right prism with 30°-60°-90° triangular faces. When in use, a beam of light enters face AB at point O, is refracted and undergoes total internal reflection from face BC, and is refracted again on exiting face AC. The prism is designed such that one particular wavelength of the light exits the prism at a deviation angle (relative to the light's original path) of exactly 60°. This is the minimum possible deviation of the prism, all other wavelengths being deviated by greater angles. By rotating the prism (in the plane of the diagram) around point O, the wavelength which is deviated by 60° can be selected.

~ ~ ~ ~ ~ ~ ~ ~ ~ ~

The dispersive Abbe prism should not be confused with the non-dispersive Porro-Abbe or Abbe-Koenig prisms.

~ ~ ~ ~ ~ ~ ~ ~ ~ ~

Optics: :See also List of optical topics....

Ernst Abbe: Ernst Karl Abbe (January 23, 1840 in Eisenach – January 14, 1905 in Jena), was a German physicist....

Dispersive: Dispersive partial differential equationDispersive mediumdispersive linedispersive mass transferdispersive powerdispersive fading...

Abbe prism related Images and Photos (experimental)

Abbe Julio Exorcises	Refracting Prism	Prism Ark Sister Hell Shinsui Version Statue	Prism Ark Theresa Tilette Shinsui Version Statue
Newton Uses a Prism to Decompose Light	Actress-Dancer Abbe Lane Dancing an Authentic Cha-Cha	Francois Napoleon Marie Moigno Known as l'Abbe Moigno French Scientist and Abbe Writer	A Lesson with Abbe Charles Michel de L'Epee after a Painting by F. Peyson
Electrical Experiment Made on a Man by Abbe Jean Antoine Nollet	A Senegalese Marabout from "Les Esquisses Senegalaises" by Abbe Boilat 1853