Annular piezoelectric plastic bender lens motor
US4303324A · kind A · utility
28Cited by
5References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 6, 1980 |
| Grant date | Dec 1, 1981 |
| Priority date | — |
| Expiry date | Oct 6, 2000 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10N30/2047
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A motor for moving a lens element in a photographic camera comprises an annular bender of piezoelectric plastic material such as polyvinylidene fluoride (PVF.sub.2). The outside edge of the annular bender is rigidly fixed to the camera, and the movable lens element is flexibly supported inside the annulus. The bender is mounted in the camera such that deflection of the bender produced by a moderately high voltage displaces the lens element along the optical axis of the camera.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.