Automatic focusing camera
US6240253A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 14, 1999 |
| Grant date | May 29, 2001 |
| Priority date | — |
| Expiry date | Sep 14, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B13/36
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An automatic-focusing camera is provided with a multiple-point distance-measurement device having a plurality of distance-measurement areas, a multiple-division photometry device having a plurality of photometry areas, and a multiple-division light-amount-control device having a plurality of light-amount-control areas. Part of the photometry areas and part of the light-amount-control areas correspond to the distance-measurement areas. When a taking lens is focused on a subject, its focus is locked. Out of the information obtained from the multiple-point distance-measurement device, a set of information obtained when the focus of the taking lens is locked is compared with a set of information obtained immediately before a shot is taken, and thereby a change in picture composition after the locking of the taking lens focus is detected. This makes it possible to achieve exposure control in ambient-light shooting and light amount control in flash shooting in accordance with a change in picture composition. Based on the information obtained from the multiple-point distance-measurement device, the subject and the background are identified, and, in accordance with the distribution of the …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.