Liquid crystal light valve goggles for eye protection
US5081542A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 12, 1989 |
| Grant date | Jan 14, 1992 |
| Priority date | — |
| Expiry date | Dec 12, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/1354
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An eye protection device 10 comprising a liquid crystal light valve 20 for providing an image of a scene. The light valve images the field of view under observation in a spectral range which matches the human eye. It will automatically reject a laser threat by simply absorbing the energy therefrom in the photoconductive layer thereof. Thus, the invention 10 provides a broad spectrum, zero response time, angle and polarization independent, sensitive eye protection device having a fast recovery time, high extinction coefficient and a high damage threshold. Hence, the invention is expected to be of significant utility to personnel operating in hostile environments.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.