Variable-focal length lens
US8014061B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 26, 2008 |
| Grant date | Sep 6, 2011 |
| Priority date | — |
| Expiry date | Dec 26, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2201/128
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
To provide a variable-focal length lens capable of altering its focal length at high speed. The variable-focal length lens has an electrooptic material and electrodes formed on an incident surface of light and on an exit surface of the light of the electrooptic material. An optical axis is set so that the light is inputted into a gap where the electrodes of the incident surface are not formed and is outputted from a gap where the electrodes of the exit surface are not formed. A focus of the light that is transmitted through the electrooptic material becomes variable by varying an applied voltage between the electrodes of the incident surface and the electrodes of the exit surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.