Fresnel lenses
US8194324B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 23, 2008 |
| Grant date | Jun 5, 2012 |
| Priority date | — |
| Expiry date | Dec 10, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T82/10
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A solar concentrator comprises a curved linear Fresnel lens (16) which has a plurality of prismatic features (10, 12, 14). The prismatic features are arranged into at least two segments, in each segment the prismatic features have a common apex angle, the common apex angle differing between adjacent segments. A method of manufacturing a mold (2) for producing a Fresnel lens optical film (16) is disclosed. The method comprises rotating a mold blank, and forming a plurality of different prismatic features (10, 12, 14) on the mold blank by repeatedly advancing a cutting tool (4) onto and then withdrawing the tool away from the surface of the mold blank.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.