초록 ▼

The automatic focusing system disclosed is characterized that the focusing condition of an objective lens to be focused is repeatedly detected with the objective lens being moved, and that defocus signals, each representing a defocus direction and a defocus amount of the lens according to the focusi

The automatic focusing system disclosed is characterized that the focusing condition of an objective lens to be focused is repeatedly detected with the objective lens being moved, and that defocus signals, each representing a defocus direction and a defocus amount of the lens according to the focusing condition upon each detection, are processed in a predetermined statistic method to produce a final signal. The final signal is effected for controlling the axial position of the objective lens to lead the lens to its infocus position. Therefore, the automatic focusing system according to the present invention achieves the high accuracy of focusing and quickness thereof.

대표청구항 ▼

An automatic focusing system for use in a camera comprising: means for successively driving an objective lens of said camera along its optical axis; means for repeatedly detecting a focusing condition of the objective lens during the movement of the objective lens to produce a detecting signal which

An automatic focusing system for use in a camera comprising: means for successively driving an objective lens of said camera along its optical axis; means for repeatedly detecting a focusing condition of the objective lens during the movement of the objective lens to produce a detecting signal which includes information of a defocus direction and a defocus amount of the objective lens with respect to a predetermind image plane; means for monitoring an amount of axial movement of the objective lens between successive detections to produce a lens moving amount signal which represents the detected amount; means for converting each detecting signal into a corresponding converted signal which would be produced from said detecting means upon the last detection in accordance with said lens moving amount signals; means for producing a final signal in response to the converted signals in accordance with a predetermined statistic method; and means for controlling said driving means in response to said final signal.