Zoom lens system for LED-based spotlight
US8641230B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 22, 2012 |
| Grant date | Feb 4, 2014 |
| Priority date | — |
| Expiry date | Oct 22, 2032 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21Y2115/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.