Illuminating lens designed by extrinsic differential geometry
US6273596A · kind A · utility
127Cited by
30References
19Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 20, 1999 |
| Grant date | Aug 14, 2001 |
| Priority date | — |
| Expiry date | May 20, 2019 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21Y2115/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A grid defining illumination cells having areas to pass light from a source for use in generation of a lines, wherein the grid is defined by first lines extending about one axis defined by the source, and second lines emanating from the axis to intersect first lines, each cell having four edges defined by successive of first lines and successive of second lines, the cells having one of the following: PA1 i) equal areas PA1 ii) areas that increase in direction away from the source.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.