| 摘要 |
PROBLEM TO BE SOLVED: To reduce the scale of an AF(automatic focus) control circuit. SOLUTION: An AF evaluation signal generating section 32 comprises an absolute value circuit 32a and an integration circuit 32b, captures an aperture signal AP generated by an aperture signal generating circuit 7c, generates an absolute value signal of the aperture signal AP, and integrates the absolute value signal for a prescribed period to generate an AF evaluation signal S. An AF processing section 33 references the AF evaluation signal S at each lens position to detect the lens position at which a focus of an optical device 1 is optimum. |
