Beamsplitter

Description

A beamsplitter is an optical device that splits a beam of light in two. It is the crucial part of most interferometers. Cubes are a convenient, protected form, made from two triangular glass prisms which are special coated and cemented together such that half of the light incident is reflected and the other half is transmitted. Another design is the use of a half mirror. This is a plate of glass with a thin coating such that, of light incident at a *5 degree angle, one half is transmitted and one half is reflected. The performance of beamsplitters are mainly depended on the coating specifications. 

1. Beamsplitter Plate
Beamsplitter Plate is a plate of glass with a thin coating such that, of light incident at a *5 degree angle, one half is transmitted and one half is reflected.
 
2. Beamsplitter Cube
Beamsplitter Cube is a convenient, protected form, made from two triangular glass prisms which are special coated and cemented together such that half of the light incident is reflected and the other half is transmitted.
 
3. Polarization Beamsplitter Cube
Polarization Beamsplitter Cube is made from two triangular glass prisms which are polarization beamsplitter coating on hypotenuse and cemented together. The output beam which is parallel to input beam is called the p-polarized beam while the orthogonal output beam is defined as the s-polarized beam.

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