Lens control device for moving range correction
US6744468B2 · kind B2 · utility
3Cited by
9References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 13, 1998 |
| Grant date | Jun 1, 2004 |
| Priority date | — |
| Expiry date | Jan 13, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/673
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A lens control device comprising a variator lens, a compensation lens for compensating for the displacement of the focal plane associated with the movement of the variator lens, a conversion lens disposed in an optical path in a detachable manner for limiting the area of the movement of the variator lens, and correction means for modifying the area of the movement of the compensation lens in response to the mounting of the conversion lens.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.