A 3D shape with all straight edges and flat faces is a polyhedron. Other 3D shapes with least one curved surface are not polyhedra. A 3D shape with regular polygonal faces, meeting at equal angles, is ...

Flashlights and headlamps are great for focused, directional beams, but for illuminating a wide area with useful, ambient light, you need a lantern. These portable devices provide 360-degree output, ...

An acrylic end table in a variety of colors if your interior is feeling a little blah. This packs quite a punch: a burst of ...

Abstract: As a type of beam steering element, the Risley prism has found extensive applications in the field of optics. A single Risley prism can deflect incident light beams with a constant deviation ...

Abstract: Risley prisms, as beam-steering components, find extensive applications in optics. A single Risley prism enables constant-angle deflection of incident light, while rotating multi-prism ...