Camera capable of automatic focal distance correction utilizing stored correction data selected responsive to a direction of movement of a taking lens system
US5515129A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 14, 1994 |
| Grant date | May 7, 1996 |
| Priority date | — |
| Expiry date | Apr 14, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B7/102
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In a camera of the present invention, an extension amount of a focusing lens is determined from a plural kind of table data for determining the extension amount of the lens from information on the distance to an object and information on the set focal distance. The camera has a storage unit for storing the zooming direction of an optical system during zooming, a selection unit for selecting data from the plural kind of table data on the basis of the contents stored in the storage unit, and an arithmetic unit for computing an extension amount of a focusing lens on the basis of the data selected by the selection unit. The camera also provides correction or backlash due to external forces by driving the photographic optical system for a given interval.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.