Auto focus device with predictive focussing

Details Auto focus device with predictive focussing Auto focus device with predictive focussing

1991-03-20

1992-02-18

Perkey, W. B.

G03B 1336

Patent

active

050898434

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.

REFERENCES:
patent: 4783677 (1988-11-01), Hamada

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