Optical layers, films and systems
US11828972B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 2, 2020 |
| Grant date | Nov 28, 2023 |
| Priority date | — |
| Expiry date | Nov 11, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/133555
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical system includes an extended illumination source configured to emit light from an extended emission surface thereof and a light redirecting layer disposed on the extended emission surface. The light redirecting layer has a structured major surface that includes a regular array of light redirecting structures, each light redirecting structure including a plurality of facets; and a plurality of discrete spaced apart window segments. The optical system includes a plurality of reflective segments where each reflective segment is disposed on a corresponding window segment. For substantially normally incident light, each reflective segment has a total: average optical reflectance of at least 30% in a visible wavelength range extending from about 420 nm to about 650 nm; and optical transmittance of at least 10% for at least one infrared wavelength in an infrared wavelength range extending from about 800 nm to about 1200 nm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.