| 摘要 |
PROBLEM TO BE SOLVED: To perform integral control so as to prevent saturation of a line sensor. SOLUTION: The focus detecting device includes the line sensor which is provided with a plurality of regions, each having a plurality of pixels, and photoelectrically converts and integrates subject light received by each pixel and then outputs the result as an image signal; monitor sensors, disposed adjacent to some of the plurality of regions of the line sensor and used to output as a monitor signal, an amount of light received in adjacent regions; and a control means for terminating the integration by the line sensor, when the monitor signal of each monitor sensor has reached the predetermined termination value; and a saturation detecting means for detection, based on the output image signal from the line sensor whether a saturation image signal is present. When the saturation detecting means detects a saturated image signal, the control means alters the termination value so that the monitor signal reaches the termination value more quickly and causes the line sensor to perform integration again. COPYRIGHT: (C)2006,JPO&NCIPI |
