
This Demonstration uses a series of Jones matrices and vectors to predict a transmitted wave through a series of optical elements. A Jones vector describes the electric field vector as two scalar components. The phase information is preserved as a complex exponent. When a polarized beam, expressed as a Jones vector, passes through an optical element, it undergoes a transformation that can be expressed as a 2×2 matrix. Each linear optical element has a Jones matrix that describes its transformation of the transmitted wave.
The following equation shows the multiplication of the Jones vector by the polarizer and wave plate Jones matrices;

and

are the incident electric field components.

, where

is the Jones matrix for the polarizer and

is the Jones matrix for the wave plate.
The transmitted beam is a vector with components

and

. The irradiance is found by summing the squares of the complex conjugates of each component.