Home▸Optics & Light▸English Lighthouse: Fresnel Lens Prism Ray-Trace - 2D Plan, Lens Section and Flash Chart

🔦 English Lighthouse: Fresnel Lens Prism Ray-Trace - 2D Plan, Lens Section and Flash Chart

2D companion of the English lighthouse Fresnel lens lab: plan view of the sweeping beams and range rings, the ray trace through 63 prisms, beam profile, flash seen from a ship and range against visibility.

Optics & Light2DModerate60 FPS📱 Mobile-adapted⇄ 3D version

⚙ Under the hood

2D companion of the English lighthouse Fresnel lens lab: the sweeping beams and range rings in plan view, the ray trace through 63 prisms in section, the traced beam profile, the flash a ship sees and luminous range against visibility, all on the same ray tracer as the 3D page.

LighthouseFresnel lensRay tracingTotal internal reflectionAllard's law

2D · HTML5 Canvas 2D · 60 FPS target · runs fully client-side, no install