초록 ▼

Improved accuracy is contrived in a focus detecting device for finding the amount of correlation between signals corresponding to images received on first and second sensor arrays. A picture element signal of each sensor is duplicated and taken out as a signal of a double Information amount, thereby

Improved accuracy is contrived in a focus detecting device for finding the amount of correlation between signals corresponding to images received on first and second sensor arrays. A picture element signal of each sensor is duplicated and taken out as a signal of a double Information amount, thereby enabling correlation calculation to be effected accurately.

대표청구항 ▼

A detection device comprising a first sensor portion provided with a plurality of light receiving portions and a second sensor portion provided with a plurality of light receiving portions and performing signal processing for focusing on the basis of outputs of said first and second sensor portions,

A detection device comprising a first sensor portion provided with a plurality of light receiving portions and a second sensor portion provided with a plurality of light receiving portions and performing signal processing for focusing on the basis of outputs of said first and second sensor portions, said detection device comprising: (a) a first circuit for transforming an output signal of each of said light receiving portions of said first sensor portion into a plurality of output signals which have the same signal level as said output signals, said transformation being performed on every output signal of each of said light receiving portions; (b) a second circuit for transforming an output signal of each of said light receiving portions of said second sensor portion into a plurality of output signals which have the same signal level as said output signals, said transformation being performed on every output of each of said light receiving portions; (c) a correlation calculation circuit for performing correlation calculation between the plurality of output signals transformed by said first circuit and the plurality of output signals transformed by said second circuit.