Variable transmission window
US8508681B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 29, 2011 |
| Grant date | Aug 13, 2013 |
| Priority date | — |
| Expiry date | Feb 27, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/133631
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The various embodiments include variable optical transmission devices with uniform or patterned polarizers or wave retarders configured to provide continuous or nearly continuous variations in light transmission based on linear translation. For example, embodiments include a variable transmission window including a first uniform polarizer with a first polarization axis, a second uniform polarizer with a second polarization axis, a first patterned wave retarder positioned between the first and second polarizers and including a first plurality of domains configured to vary in at least one of optic axis, thickness, or birefringence, and a second patterned wave retarder positioned between the first and second polarizers and including a second plurality of domains configured to vary in at least one of optic axis, thickness, or birefringence. The first or second wave retarder is configured to be linearly translatable relative to the other wave retarder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.