Asymmetric sport lighting luminaire
US5313379A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 11, 1993 |
| Grant date | May 17, 1994 |
| Priority date | — |
| Expiry date | Mar 11, 2013 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21W2131/105
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An asymmetric luminaire for illuminating large outdoor areas, such as an athletic field, wherein glare and light spillage is minimized and controlled. The luminaire includes a reflecting surface of a generally parabolic configuration, and an arc light source is located within the luminaire, the length of the light source being disposed at approximately 45.degree. with respect to the parabolic axis. A visor is used at the peripheral rim of the luminaire to control vertical and lateral light spillage, and the visor includes light source shields to prevent vertical spillage from the upper region of the luminaire. The luminaire reflecting surface includes a plurality of elliptical light reflecting ridges for restricting the near light beam height, and the upper portion of the reflecting surface can include substantially conical concentric light reflecting flute surfaces for accurately directing the light to target locations remote from the luminaire.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.