Focus adjusting apparatus for use in a camera or the like
US5061953A · kind A · utility
15Cited by
4References
28Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 10, 1991 |
| Grant date | Oct 29, 1991 |
| Priority date | — |
| Expiry date | Jan 10, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B7/36
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A focus adjusting apparatus in which a lens position in focus to an object at a predetermined time is foreseen with the result of the distance measurement at a plurality of times in the past taken into account, and a lens is driven to the foreseen position to thereby make the lens always in focus to a moving object. Whether the distance measurement is being continuously effected for the same object is discriminated based on the continuity of movement of the moving object and when the distance measurement for the same object is not effected, the foreseeing operation is inhibited and proper foreseeing operations are executed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.