Optical apparatus
US6437925B1 · kind B1 · utility
160Cited by
9References
31Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 25, 1999 |
| Grant date | Aug 20, 2002 |
| Priority date | — |
| Expiry date | Jun 25, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/63
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical apparatus includes a variable optical-property element to change its optical properties by applying an electric or magnetic field or temperature to a liquid crystal. In this way, the optical apparatus is reduced in thickness, and can be used in a cam era, a microscope, etc.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.