Automatic focus adjusting device

Details Automatic focus adjusting device Automatic focus adjusting device

1989-02-22

1990-11-27

Adams, Russell E.

354402, 354430, G03B 1336

Patent

active

049740024

ABSTRACT:
An automatic focus adjusting device which takes into account a change in the position of the image plane of an object caused by movement of the object during the focus adjusting operation time and makes a lens in focus to the moving object. The position of the image plane of the object after the focus adjusting operation time is foreseeing-calculated with the result of a past focus adjusting operation as a factor, and the current focus adjusting operation time is foreseen in conformity with the foreseeing-calculated value, and the position of the image plane of the object is again foreseeing-calculated with the foreseen time as a factor.

REFERENCES:
patent: 4681419 (1987-07-01), Sakai et al.
patent: 4762986 (1988-08-01), Suda et al.
patent: 4783677 (1988-11-01), Hamada et al.

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