Automatic focus controlling apparatus
US5159376A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 24, 1991 |
| Grant date | Oct 27, 1992 |
| Priority date | — |
| Expiry date | May 24, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B7/28
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An automatic focus controlling apparatus for a camera can set a lens position in a focus detection impossible state on the basis of previously obtained information associated with a distance to an object. The apparatus comprises a memory means for storing a focus controlling signal, and lens drive controlling means for, when an inoperative signal is output, controlling to drive a photographing lens in accordance with lens position information, and for, when the focus controlling signal is output, controlling to drive the photographing lens to a focus controlling position in accordance with the focus controlling signal. When the focus controlling signal is detected, the photographing lens is driven to a focus controlling position in accordance with the detected information. When the inoperative signal is output, the photographing lens is driven in accordance with the focus controlling signal stored in the memory means.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.