Multi-port projector improving the uniformity of the illuminated field
US5765943A · kind A · utility
6Cited by
4References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 3, 1996 |
| Grant date | Jun 16, 1998 |
| Priority date | — |
| Expiry date | Oct 3, 2016 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21W2131/205
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A projector comprises optical elements arranged each to constitute a passage port comprising, on the one hand, a first lens (d.sub.1) ensuring focussing of the light source (3) in the plane to be illuminated, whilst optimizing the correction of optical aberrations and, on the other hand, a second lens (d.sub.2) ensuring a multiplication of the image of the source to permit rendering uniform the illumination in the illuminated plane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.