| 摘要 |
A focus detection device includes line sensors which each photoelectrically convert and integrate light from an object so as to output the received light as an image signal; monitor sensors provided adjacent to the line sensors; a control device which controls an integration operation of a predetermined line sensor and a predetermined monitor sensor; and a detection device which detects that a monitor signal of each of the monitor sensors reaches a predetermined termination value for terminating integration of the corresponding line sensor after the control device allows the predetermined line sensor and monitor sensor to start the integration. The control device outputs a first termination signal from a first control terminal when the detection device detects the monitor signal first reaching the termination value, and thereafter outputs integration termination information of the respective monitor sensors detected sequentially from the first control terminal.
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