Industry Patents

Zoom lens systems for LED-based spotlights include a base lens and a disk lens. The base lens can be a TIR lens with convex microlenses on a front surface. The disk lens can be generally planar. A rear surface of the disk lens can have concave microlenses complementary to the microlenses on the front surface of the base lens. A front surface of the disk lens can have convex microlenses with a different geometry from the microlenses on the front surface of the base lens. The disk lens can be movable relative to the base lens from a narrow-angle position in which a rear surface of the disk lens is in contact with a front surface of the base lens to a wide-angle position in which the rear surface of the disk lens is separated from the front surface of the base lens.