05 -- Polarisation, coatings and Fresnel losses¶

Jones calculus with s/p decomposition at every surface. Things to check in the results:

The overview figure of this example's run (python make_figures.py redraws it; the file is hero.png).

• after_mirror: the 45-degree quarter-wave stack reflects s and p with different phase -> the 30-degree linear input becomes slightly elliptical (s3 != 0).
• after_window: the Brewster window transmits p (x) fully and loses ~15 % of s (y) per surface -> the polarisation rotates towards x.
• after_polarizer / energyMeter: what survives the half-wave plate + thin-film polariser.
• lossBudget: coating (mirror), fresnel (window), polarization (polariser).

Switch "polarization": "scalar" in run.json to see the s/p-averaged model for comparison. With a Zemax export, the plane of incidence of every surface comes from the traced ray vectors instead of planeOfIncidenceDeg (docs/polarization.md).