초록 ▼

In an aspect, an output from a central ranging section is supplied to a comparator, a nearest point determining section, and a selecting section, whereas outputs from a peripheral ranging section are supplied to the determining section and the selecting section. The first and second predetermined va

In an aspect, an output from a central ranging section is supplied to a comparator, a nearest point determining section, and a selecting section, whereas outputs from a peripheral ranging section are supplied to the determining section and the selecting section. The first and second predetermined values are input to the comparator and the selecting section. A gate circuit receives the determination result from the nearest point determining section and the comparison result from the comparator via an inverter. Another gate circuit receives the outputs from the comparator and the selecting section. A focus control section controls a focusing lens according to the outputs from the gate circuits. In another aspect, an output from a central ranging section is supplied to a nearest point selecting section, a standard deviation calculating section, and a gate circuit, whereas outputs from a peripheral ranging section are supplied to the selecting and calculating sections. A comparator receives the calculation result from the calculating section and a predetermined value. Another gate circuit receives the outputs from the selecting and calculating sections. An output from the gate circuits which is selected by the comparator is supplied to a focus control section, so as to control a focusing lens.

대표청구항 ▼

An autofocusing apparatus for a camera, comprising: a photographing lens for forming an object image on a film surface; a first ranging unit for measuring a distance to an object located at a substantially central portion of a photographic frame of said camera, and for outputting a first ranging res

An autofocusing apparatus for a camera, comprising: a photographing lens for forming an object image on a film surface; a first ranging unit for measuring a distance to an object located at a substantially central portion of a photographic frame of said camera, and for outputting a first ranging result; a second ranging unit for measuring a distance to an object located at a peripheral portion of the photographic frame, and for outputting a second ranging result; a control unit for receiving the first and second ranging results obtained by said first and second ranging units and for determining a focusing position of said photographing lens, said control unit determining whether the first ranging result obtained by said first ranging unit is larger than a first predetermined distance which is relatively short, and, when said control unit determines that the first ranging result is larger than the firs: predetermined distance, said control unit selecting and outputting one of the first and second ranging results which is nearer to a second predetermined distance which is larger than said first predetermined distance, wherein said first and second ranging results indicate distance which are at least one of far from and near to said second predetermined distance; and a focus control unit for receiving the output from said control unit and for controlling said photographing lens on the basis of the output from said control unit.