Optical light diffuser and method for measurement thereof
US10539290B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 27, 2013 |
| Grant date | Jan 21, 2020 |
| Priority date | — |
| Expiry date | Sep 27, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2201/0634
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention relates to optical light diffusers for use with point light sources, such as LED lighting. The optical diffusers achieve an optimum balance of light transmission and hiding power. The optical light diffuser is a transparent plastic matrix, such as Plexiglas® resin from Arkema Inc., having organic particles dispersed within the matrix. The particles are crosslinked beads having specific particle sizes and loading. Different beads can be combined to provide added properties such as a textured surface, and to optimize hiding power and light transmission. The invention also relates to a luminous device containing at least one light-emitting diode and a cover made of the optical light diffuser. The invention further relates to a method for assessing hiding power.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.