Reduced diameter camera lens barrel with lens shift device and improved focus lens drive linkage
US5592335A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 23, 1994 |
| Grant date | Jan 7, 1997 |
| Priority date | — |
| Expiry date | Mar 23, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B7/10
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A camera lens barrel for a camera includes first, second, third and fourth lens groups with a diaphragm located between the second and third lens groups. The second and third lens groups are connected, while the first, third and fourth lens groups can move relative to each other along the optical axis of the camera lens barrel. A diaphragm driver is positioned radially outside of the second lens group, while a lens shift driver device, including the horizontal and vertical lens shift drivers, is positioned radially outside of the third lens group. The diaphragm driver and the lens shift driver device are connected to a control unit via a flexible printed circuit. A power transmission extends from the diaphragm driver to the fourth lens group. The power transmission is connected to the diaphragm driver via a pin. When the pin is rotated, the angular rotation of a pin is transmitted to the fourth lens group to focus the camera lens barrel. Thus, the overall diameter of the camera lens barrel is reduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.