Light polarizing materials, liquid suspensions and films thereof, and light valves incorporating same
US6156239A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 26, 1999 |
| Grant date | Dec 5, 2000 |
| Priority date | — |
| Expiry date | Feb 26, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/172
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Polyhalide light-polarizing particles prepared by the process comprising reacting in a suitable liquid (i) elemental molecular iodine, (ii) an inorganic halide, with (iii) a substantially rigid polycyclic precursor compound, wherein: PA1 a. the polycyclic precursor compound has two cyclic structures linked together via an aromatic or heteroaromatic group; PA1 b. the three-dimensional structure of the polycyclic precursor compound has a cavity defined by the two cyclic structures and only one opening into the cavity; and PA1 c. polar groups are provided in the outside of the polycyclic precursor compound; and PA1 d. one of more chelating group or groups are provided inside the cavity of the precursor group for chelating hydrogen or metal ions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.