| 摘要 |
PROBLEM TO BE SOLVED: To provide a focusing method, with which a focus position can be accurately and easily adjusted, even if neighbors of peak points in pocked-up contrast characteristics and MTF characteristics are unclear, when making an imaging lens move in the optical axis direction to adjust the focus position in an imaging apparatus. SOLUTION: First and second charts CH1 and CH2, provided with imaging patterns divided to black and white, are set before and after a target position P of a subject, and a focusing lens 3 is moved in a direction of an optical axis X, focus evaluation values of imaging patterns of the first and the second test charts CH1 and CH2, which are imaged on a charge coupled device 5, are obtained, in association with the moved amount of the focus lens 3, and the position of the focus lens 3 is set so that the focus evaluation value of the first test chart CH1 and that of the second test chart agree with each other. COPYRIGHT: (C)2009,JPO&INPIT |
