Zoom and focus control method and system
US6714731B2 · kind B2 · utility
5Cited by
4References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 23, 2001 |
| Grant date | Mar 30, 2004 |
| Priority date | — |
| Expiry date | Feb 23, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B7/04
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A focus lens and a zoom lens group having a first zoom lens and a second zoom lens are controlled separately from one another in an internal-focus camera. The positions of the focus lens and the second zoom lens in the zoom lens group are tracked, and are controlled to approach no closer to one another than a minimum safe distance to avert collisions between the focus lens and the second zoom lens.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.