초록 ▼

A focus detecting device of the type in which the amount of focus adjustment is found from the amount of image deviation between object images formed on first and second sensor arrays. The magnitude of the regularity of the image pattern or the magnitude of the brightness/darkness deviation rate or

A focus detecting device of the type in which the amount of focus adjustment is found from the amount of image deviation between object images formed on first and second sensor arrays. The magnitude of the regularity of the image pattern or the magnitude of the brightness/darkness deviation rate or the shape similarity is discriminated and light projection means is operated when the regularity is great or when the brightness/darkness deviation rate or the shape similarity is small.

대표청구항 ▼

A focus detecting device for detecting a focusing state of an imaging optical system or a distance to an object on the basis of outputs from first and second photoelectric converting portions receiving light from the object, comprising: (a) a calculation circuit for calculating regularity of a brigh

A focus detecting device for detecting a focusing state of an imaging optical system or a distance to an object on the basis of outputs from first and second photoelectric converting portions receiving light from the object, comprising: (a) a calculation circuit for calculating regularity of a brightness-darkness pattern of the object for regularity of output signals of said photoelectric converting portions, on the basis of the outputs of said photoelectric converting portions; and (b) a discrimination circuit for discriminating strength of the regularity calculated by said calculation circuit and outputting a signal for commanding light projection means to project light when it is discriminated that said regularity is strong.