Auto focus device with predictive focussing
US5089843A · kind A · utility
15Cited by
1References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 20, 1991 |
| Grant date | Feb 18, 1992 |
| Priority date | — |
| Expiry date | Mar 20, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B7/36
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An auto focus device for predicting the position of a moving objerct after a predetermined time on the basis of past autofocus operations and driving the lens to focus on the predicted position. The predetermined time being calculated based on the discrimination of the direction of movement of the object. The predicting calculations place the lens in a closer near state rather than making the lens in focus to the moving object.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.