Lens apparatus
US8687284B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 26, 2011 |
| Grant date | Apr 1, 2014 |
| Priority date | — |
| Expiry date | Jun 5, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/672
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A lens apparatus has an image pickup optical system including a focus lens and a zoom lens, a focus detector, a defocus amount calculating unit, and a controller. The focus detector detects a focus state of the image pickup optical system. The defocus amount calculation unit calculates a defocus amount based on the detected focus state. The controller calculates a driving amount necessary to drive the focus lens to a focus position based on the calculated defocus amount. The controller controls the driving of the focus lens. In particular, the controller controls a driving speed of the focus lens depending on the calculated defocus amount and the calculated driving amount.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.