Auto focusing apparatus in a camera

Details Auto focusing apparatus in a camera Auto focusing apparatus in a camera

1995-05-16

1996-10-08

Perkey, W. B.

Photography

With exposure objective focusing means, focusing aid, or...

Plural focusing or rangefinding areas

G03B 1336

Patent

active

055636772

ABSTRACT:
An auto focusing apparatus in a camera comprises a detecting device for detecting the measured distance values of an object corresponding to a plurality of areas in a photographing image field, a first determining device for determining a first measured distance value which is the measured distance value of the shortest distance from the plurality of measured distance values detected by the detecting device, a comparing device for comparing the first measured distance value determined by the first determining device with a threshold value, a second determining device for determining the mean value of the plurality of measured distance values detected by the detecting device as a second measured distance value, and a driving device for driving a photo-taking lens on the basis of the first measured distance value when it is judged by the comparing device that the first measured distance value is smaller than the threshold value, and driving the photo-taking lens on the basis of the second measured distance value when it is judged by the comparing device that the first measured distance value is equal to or greater than the threshold value.

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patent: 5243375 (1993-09-01), Ishida et al.
U.S. Ser. No. 08/442,177, Filing Date May 16, 1995, Masaru Muramatsu, et al., Nikon Corporation.
U.S. Ser. No. 08/519,177, Filing Date Aug. 25, 1995, Masaru Muramatsu, et al., Nikon Corporation.

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