Beam-forming lens with internal cavity that prevents front losses
US5757557A · kind A · utility
139Cited by
3References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 9, 1997 |
| Grant date | May 26, 1998 |
| Priority date | — |
| Expiry date | Jun 9, 2017 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21Y2115/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A device for directing light longitudinally forwardly, that comprises a lens body having a front face facing forwardly, rearward body extent, and a curved sidewall extending between the rearward body extent and the front face; a rear cavity in the body, the cavity having a sidewall and a front wall defining a corner; and a light source in the cavity, and characterized in that light rays transmitted by the light source toward the curved sidewall, and toward the corner are collimated forwardly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.