Automatic focus adjusting apparatus

Details Automatic focus adjusting apparatus Automatic focus adjusting apparatus

1990-09-17

1992-01-07

Adams, Russell E.

354402, 3541951, G03B 1336

Patent

active

050795813

ABSTRACT:
A automatic focus detecting apparatus in which a focal point position corresponding to a change in position of an object after the elapse of a predetermined time is foreseen and calculated on the basis of the result of a past focal point adjustment. In accordance with the aperture value and lens characteristic at the time of photographing, a selection is made with respect to whether the calculation is executed in a normal mode to calculate the focal point position on the basis of only the result of the detection of the focal point at the present time independently of the result of the past focal point adjustment, or the calculation is executed in the foreseeing mode. Upon photographing, if there is no need to execute the foreseeing calculation, the focal point position is calculated in the normal mode.

REFERENCES:
patent: 4783677 (1988-11-01), Hamada et al.
patent: 4816856 (1987-03-01), Hamada et al.

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