Light-redirecting optical daylighting system
US10012356B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 22, 2017 |
| Grant date | Jul 3, 2018 |
| Priority date | — |
| Expiry date | Nov 22, 2037 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE06B2009/2417
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Light-redirecting optical system for building fenestrations, such as glass doors and windows, storefront glazing systems, and curtain walls, that can collect and redirect daylight into the interior of a building. The light-redirecting optical system includes an outward-facing light-redirecting optical surface and an inward-facing light-redirecting surface. The outward-facing light-redirecting optical surface collects and redirects daylight mostly upward toward the inward-facing light-redirecting surface. The inward-facing light-redirecting surface receives the redirected daylight and further redirects it into the interior environment at pre-determined angles; so that all specular rays of light are at or above the horizon for a wide range of incident angles of daylight striking the outward-facing light-redirecting optical surface. The light-redirecting optical surfaces can be fabricated on a film or flexible substrate that may be directly applied to glass, acrylic, or other glazing surfaces. Alternatively, the light-redirecting optical surfaces may be fabricated directly on the glazing surfaces.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.