Lighting fixture utilizing a multi-layered hologram as a lens element
US4536833A · kind A · utility
8Cited by
2References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 16, 1984 |
| Grant date | Aug 20, 1985 |
| Priority date | — |
| Expiry date | Apr 16, 2004 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21Y2103/00
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A lighting fixture utilizing a spatially fixed light source and a multi-layered hologram as a lens element. The hologram receives light from the source and directs it to a task area. The layers of the lens element are responsive to light of one or more wavelengths of interest and varying angles of incident radiation so as to diffract light from the source toward the task area.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.