초록 ▼

A camera with an automatic focusing device has an objective lens mounted on a camera. An image formed by the objective lens is divided into a plurality of zones. In each zone, a brightness distribution is obtained so as to detect a rough focusing condition in each zone, thereby producing a plurality

A camera with an automatic focusing device has an objective lens mounted on a camera. An image formed by the objective lens is divided into a plurality of zones. In each zone, a brightness distribution is obtained so as to detect a rough focusing condition in each zone, thereby producing a plurality of rough focusing condition data. Based on the result of the rough focusing condition data, one zone is selected. Furthermore, a precise focusing condition is detected in the selected zone based on the light contained in the selected zone, so as produce a precise focusing condition data. Based on the precise focusing condition data obtained from the selected zone, the objective lens is driven to an infocus condition.

대표청구항 ▼

A camera with an automatic focusing device comprising: an objective lens mounted on a camera; means for dividing an image formed by said objective lens into a plurality of zones; means for obtaining a brightness distribution in each zone; first means for detecting a rough defocus amount in each zone

A camera with an automatic focusing device comprising: an objective lens mounted on a camera; means for dividing an image formed by said objective lens into a plurality of zones; means for obtaining a brightness distribution in each zone; first means for detecting a rough defocus amount in each zone based on said brightness distribution of said zone so as to produce a plurality of rough defocus amount data; means for selecting one zone based on the rough defocus amount data of the plurality of zones; second means for detecting a precise defocus amount in a zone selected by said selecting means based on the brightness distribution contained in said selected zone, so as to produce a precise defocus amount data; and means for driving said objective lens to an infocus condition based on said precise defocus amount data obtained from said selected zone.