Auto focusing apparatus in a camera
US5561497A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 16, 1995 |
| Grant date | Oct 1, 1996 |
| Priority date | — |
| Expiry date | May 16, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B7/28
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An auto focusing apparatus in a camera comprises a detecting device for detecting the measured distance values of an object corresponding to a plurality of areas in a photographing image field, a first determining device for determining a first measured distance value which is the measured distance value of the shortest distance from the plurality of measured distance values detected by the detecting device, a comparing device for comparing the first measured distance value determined by the first determining device with a threshold value, a second determining device for determining the mean value of the plurality of measured distance values detected by the detecting device as a second measured distance value, and a driving device for driving a photo-taking lens on the basis of the first measured distance value when it is judged by the comparing device that the first measured distance value is smaller than the threshold value, and driving the photo-taking lens on the basis of the second measured distance value when it is judged by the comparing device that the first measured distance value is equal to or greater than the threshold value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.