| 摘要 |
PURPOSE:To eliminate the occurrence of hunting through repetition of reciprocating movement of a lens by counting the times when the correlation output goes to a high level above the prescribed one during one time of focusing state detecting operation in a signal processing circuit thereby performing controlling. CONSTITUTION:This automatic focusing device consists of an intensity distribution detecting part 10 which detects the intensity distributions of the subject images by the luminous fluxes past the different parts of a photographing optical system in a photographing device respectively as image signals and a signal processing circuit 20 which processes the image signals detected by this, detects the focusing state of the photographing device, and outputs the driving direction signal for moving the lens of the photographing optical system in a focusing direction at the nonfocused state. Further, it is provided with a lens driving device 30 which moves the lens of the photographing optical system in its assigned direction while said driving direction signal is outputted and a display device 40 which displays the focused state. |
