Fresnel Point How a Lighthouse Lens Works Carousel
Six 1080x1350 carousel slides on warm grained paper inside a double rule plate frame, drawn as engraved technical plates in deep navy ink with lamp amber light rays and pale sea glass hatched lenses: a front view first order lens with ray burst on the cover, then an open flame, a solid plano convex lens, Fresnel's stepped profile, a section through the catadioptric prisms and a plan view of the rotating panels on a mercury bath. Headlines are set in Bodoni Moda with Jost step labels and body copy, italic Bodoni figure captions and callouts, and a tiny lighthouse mark, so it reads as a calm, collectable museum explainer with a clear step one to five sequence.