| 摘要 |
<p>An image pickup signal extracted by a gate circuit (8) is applied to a brightness signal generating circuit (9) and a brightness signal is generated. By a high pass filter (10), high frequency component of the brightness signal is extracted. A digital integrator (11) integrates high frequency signals of one image plane, and outputs the result as an evaluating value to a CPU (12). CPU (12) detects a situation where there are two peaks of focus evaluating values and the position having maximum focus evaluating value does not correspond to the optical in-focus position, and drives a focus motor (13) such that a focus lens (1) is set at an position where the focus evaluating value is smallest between the two peaks. <IMAGE></p> |
