초록 ▼

An illuminating system is provided for a focus detecting device capable of producing range detection signals corresponding to the distance between the camera and the objects by receiving with a plurality of photoelectric elements the light of the objects transmitted through a fixed light passage and

An illuminating system is provided for a focus detecting device capable of producing range detection signals corresponding to the distance between the camera and the objects by receiving with a plurality of photoelectric elements the light of the objects transmitted through a fixed light passage and a movable light passage provided with a movable mirror. The illuminating light source of the illuminating system is disposed to project the illuminating light through the movable light passage. When the brightness of the objects is low, the plurality of photoelectric elements are integrated into practically a single photoelectric element to combine the outputs of respective photoelectric elements into a single output thus receiving the reflected light of the illumination and providing a focus detection signal.

대표청구항 ▼

A focus detecting device, capable of providing range detection signals corresponding to distances between the camera and objects by receiving with a plurality of photoelectric elements the incident from objects transmitted through a fixed light passage and a movable light passage having a movable mi

A focus detecting device, capable of providing range detection signals corresponding to distances between the camera and objects by receiving with a plurality of photoelectric elements the incident from objects transmitted through a fixed light passage and a movable light passage having a movable mirror, comprising an illuminating system adapted to project light through said movable light passage, and a brightness detecting circuit which provides a signal to integrate said plurality of photoelectric elements into a single photoelectric element when the brightness of an object is insufficient thus receiving the reflected light of the illumination with said photoelectric elements and producing a range detection signal.