💎 Birefringence Bench: Double Refraction, Walk-off and Interference Colours

Interactive 3D optical bench with a Blender-made calcite rhomb, polarisers and screen: ordinary and extraordinary refraction solved in full vector form, Poynting walk-off, retardation and interference colour, with five numerical checks.

3D · Three.js / WebGL renderer · 60 FPS target · runs fully client-side, no install