Automatic focussing adjusting device

Details Automatic focussing adjusting device Automatic focussing adjusting device

1988-09-20

1990-03-13

Adams, Russell E.

354402, 354406, G03B 300

Patent

active

049086430

ABSTRACT:
An automatic focussing adjusting device which detects the amount of de-focussing of an image of an object to perform an automatic focussing adjustment of a taking lens of a camera including a zoom lens. The magnification m of a group of magnification varying lenses in the zoom lens is corrected and the amount of movement .DELTA.X of a group of focus lenses necessary for focussing is calculated based on a corrected magnification .alpha..multidot.m, so that a focussing adjustment can be executed. Also, an error in the amount of de-focussing, caused by manufacturing errors in dimensions defining a positional relationship between line sensors and a group of microscopic lenses in a focus detect element is corrected, and based on a correctively calculated amount of de-focussing .beta..multidot..DELTA.P, a focussing adjustment is performed.

REFERENCES:
patent: 4694151 (1987-09-01), Yoshimura
patent: 4697891 (1987-10-01), Kawai
patent: 4737813 (1988-04-01), Ishida et al.
patent: 4816859 (1989-03-01), Maruyama et al.

Affiliated with

Also associated with

Rating

Automatic focussing adjusting device does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Automatic focussing adjusting device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Automatic focussing adjusting device will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-53370