Optical apparatus with image area sensors for controlling lens f

Details Optical apparatus with image area sensors for controlling lens f Optical apparatus with image area sensors for controlling lens f

1994-11-01

1997-03-25

Blankenship, Howard B.

Photography

Having variable focal length of camera objective

Automatic change of focal length

396128, G03B 300, G03B 1318

Patent

active

056153988

ABSTRACT:
An optical apparatus includes an image pickup part arranged to convert a light flux representative of an object image into an image signal, a detecting part arranged to detect information on the object image by using the image signal, a discriminating part arranged to discriminate the size of a main object by using the information on the object image detected by the detecting part, and a deciding part which decides, on the basis of a discrimination made by the discriminating part, a focal length of an optical system to be changed.

REFERENCES:
patent: 3185052 (1961-11-01), Baron
patent: 5089841 (1992-02-01), Yamada
patent: 5315341 (1994-05-01), Hibbard

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