A basic collection of routines to track and visualize polarization through polarizers and birefringent elements. Some basic ellipsometry support is also included.

There are four modules

• pypolar.fresnel - Fresnel reflection and transmission calculations
• pypolar.jones - Routines to support the Jones calculus
• pypolar.mueller - Routines to support the Mueller calculus
• pypolar.visualization - Routines to support visualization

Jupyter notebook documentation is included, but overall testing could be better. The Mueller module is still incomplete.

import pypolar.mueller as mueller

# Optical Isolator example

A = mueller.stokes_right_circular()       # incident light
B = mueller.op_linear_polarizer(np.pi/4)  # polarizer at 45°
C = mueller.op_quarter_wave_plate(0)      # QWP with fast axis horizontal
D = mueller.op_mirror()                   # first surface mirror
E = mueller.op_quarter_wave_plate(0)      # QWP still has fast axis horizontal
F = mueller.op_linear_polarizer(-np.pi/4) # now at -45° because travelling backwards```

# net result is no light
F @ E @ D @ C @ B @ A

• Jones Calculus
• Fresnel Reflection
• Mueller Calculus
• Ellipsometry
• Fresnel Rhomb

Use pip

pip install pypolar

Required Python modules: numpy, matplotlib

pypolar is licensed under the terms of the MIT license.