Illuminating device with a light distributing lens
US5772306A · kind A · utility
8Cited by
7References
21Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 11, 1996 |
| Grant date | Jun 30, 1998 |
| Priority date | — |
| Expiry date | Jun 11, 2016 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21S41/27
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A lens for a light distribution has an incident surface and an exit surface, where the exit surface is an aspheric surface so that an aberration of the outer periphery in the horizontal direction can be larger than an aberration of the outer periphery in the vertical direction of the exit surface. Among light distributions formed by an outgoing light emitted from the exit surface, a light distribution in the horizontal direction blurs on the peripheral portion but a light distribution in the vertical direction does not blur on the peripheral portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.