Optical focusing system
US4530040A · kind A · utility
48Cited by
15References
40Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 8, 1984 |
| Grant date | Jul 16, 1985 |
| Priority date | — |
| Expiry date | Mar 8, 2004 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21W2111/00
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An improved optical focusing system is provided which includes a parabolic reflector and a fresnel lens situated with respect to one another to share a common focus point. The improved system is designed to collimate substantially all of the available light emitted from a light source located at the common focus point and project the light along a projecting axis. Depending on the limitations placed upon the size of the parabolic reflector, a retroreflector situated about the periphery of the fresnel lens can be added to the system to maximize the amount of emitted light which the system can process and collimate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.