Endoscope using liquid crystal devices different in the response frequency in the image forming optical system
US5047847A · kind A · utility
77Cited by
5References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 21, 1989 |
| Grant date | Sep 10, 1991 |
| Priority date | — |
| Expiry date | Aug 21, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/555
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
At least a part of an image forming optical system is formed of a liquid crystal assembly consisting of a plurality of liquid crystals having a refractive index anisotropy and having different response frequencies of molecule orientation so that the transmittivity and refractive index of the plurality of liquid crystals may be independently controlled with few signal lines by varying the frequency of the driving signal applied to the liquid crystal assembly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.