Polarized non-rotating variable light transmitting window
US6414790B1 · kind B1 · utility
10Cited by
12References
8Claims
0Family size
Inventor
Key dates
| Filing date | Nov 30, 1999 |
| Grant date | Jul 2, 2002 |
| Priority date | — |
| Expiry date | Nov 30, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/281
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A window whose light transmission can be mechanically controlled and varied smoothly from a high value of approximately 40% to a low value of approximately 1% is achieved without the requirement of rotation. Polarizing molecules are coated onto four different surfaces in particular patterns. When the coated panels are assembled in the disclosed manner light transmission can be modified with only small translational movements. Durability benefits are also achieved, as well as the potential for lowered heat transmission.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.