Automatic focus adjustment apparatus for moving object photograp

Details Automatic focus adjustment apparatus for moving object photograp Automatic focus adjustment apparatus for moving object photograp

1995-04-17

1995-12-19

Perkey, W. B.

G03B 1336

Patent

active

054773024

ABSTRACT:
An automatic focus adjustment apparatus includes a focus detection unit for detecting a distance along the optical axis between an object image plane and a prospective focal plane of a photographing lens at a predetermined time interval, a moving amount detection unit for detecting a moving amount of the photographing lens, an image plane speed calculation unit for calculating a moving speed of the object image plane, a focusing position calculation unit for calculating a focusing position of the photographing lens where the object image plane is caused to coincide with the prospective focal plane a position detection unit for detecting a current position of the photographing lens, a position control unit for controlling the position of the photographing lens, a speed control unit for determining a control amount for controlling the moving speed of the photographing lens, and a driving unit for driving the photographing lens according to the control amount determined by the speed control unit.

REFERENCES:
patent: 5153630 (1992-10-01), Ogasawara

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