Illuminator that outputs linearly polarized light and that is suitable for use in microdisplay based light engine applications
US7556382B1 · kind B1 · utility
0Cited by
2References
26Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 13, 2004 |
| Grant date | Jul 7, 2009 |
| Priority date | — |
| Expiry date | Dec 30, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B21/28
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A hollow sphere with a scattering (e.g., white diffusive) interior surface directs light input from at least one input light source to an exit. The exit has a reflective polarizer that passes light of a selected polarization to an output. Light of other polarization(s) is reflected back into the sphere where it becomes unpolarized because of reflections and may eventually be returned to the exit at the selected polarization. The illuminator is well suited as a light source for light management systems of various configurations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.