An antiprism is a convex polyhedron; a form consisting of two parallel copies of a regular polygon, connected by an alternating band of triangles.
Design 2013 / Exhibitions Stockholm Furniture Fair Greenhouse 2013 and Ventura Lambrate Warehouse 2013 Sizes Ø 375-425 mm, h 65 mm / 5-7 CITIZEN COB-LEDs, 1325-1855 lm, 15-18 W, dimmable / Titanium-ceramic (TiN) mirror finish coated or powder coated stainless steel / Textile dual-conduit cable, adjustable single 1mm steel wire suspension / Light customisable by diameter, height and edge count
The lights are folded from a single perforated titanium-ceramic (TiN) coated sheet of stainless steel. The folds provide stability and, by their perforations, trace the form with light into space. The angular geometry of antiprisms allows high-performance LEDs to be mounted invisibly and glare-free, directing their light upwards to be reflected by the matte white inner top face. The luminous flux is optimised and shadow casting is much reduced. The LED’s heat is dissipated by one triangle each and no extra heat sinks are required.
The astronomer and optician Johannes Kepler described antiprisms for the first time. Like the Renaissance artists Luca Pacioli or Albrecht Dürer, Kepler studied polyhedral geometry, dedicating the first volume of his opus magnum Harmonices Mundi to them. The seven-sided (heptagonal) antiprism is exceptional: it cannot be constructed with compass and ruler, proven by Carl Friedrich Gauß in Disquisitiones Arithmeticae.
