Lens control apparatus, lens barrel, imaging apparatus, and optical apparatus
US7697218B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 25, 2008 |
| Grant date | Apr 13, 2010 |
| Priority date | — |
| Expiry date | Nov 25, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B7/028
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A lens control apparatus includes a temperature detection unit configured to detect a temperature near a zoom lens and a focus lens, a zoom lens drive unit configured to drive the zoom lens, and a controller configured, if it is determined that a current temperature near the zoom lens and the focus lens detected by the temperature detection unit is higher than a reference temperature, to acquire a telephoto end position to be set at the current temperature, to compare the telephoto end position with a current position of the zoom lens, and to cause the zoom lens drive unit to move the zoom lens to the telephoto end position if the current position of the zoom lens is located beyond the telephoto end position on a telephoto side.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.