Focus adjusting apparatus for use in a camera or the like

Details Focus adjusting apparatus for use in a camera or the like Focus adjusting apparatus for use in a camera or the like

1991-01-10

1991-10-29

Perkey, W. B.

Radiant energy

Ionic separation or analysis

Static field-type ion path-bending selecting means

2502012, G03B 1336, G03B 728

Patent

active

050619535

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.

REFERENCES:
patent: 4681419 (1987-07-01), Sakai et al.
patent: 4709138 (1987-11-01), Suda et al.
patent: 4783677 (1988-11-01), Hamada et al.
patent: 4800261 (1989-01-01), Akashi

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