JP2006010756A5 - - Google Patents

Claims (11)

An evaluation value calculation means for calculating an evaluation value indicating a focus state of the optical image on the basis of the output of the photoelectric conversion means for outputting an optical image as an electric signal by photoelectric conversion, against the in-focus position of the full Okasurenzu A shift calculating means for calculating a shift amount and a shift direction; and a control means for controlling the movement of the focus lens , wherein the control means determines whether or not to start the movement again after stopping the focus lens once. An imaging apparatus that performs the calculation based on the calculated evaluation value and the calculated shift amount and shift direction. 2. The deviation calculation unit includes a subject distance measurement unit that acquires information corresponding to a distance to the subject, and calculates the shift amount and the shift direction based on the acquired information. The imaging device described. It said deviation calculating means, the image pickup apparatus according to claim 1 or 2, characterized in that to calculate the amount of change per unit time the shift amount. The calculated change amount includes the calculated shift amount, a value obtained by smoothing the calculated shift amount, a change amount of the calculated shift amount, and a difference from a reference value of the calculated shift amount. The imaging device according to claim 3 , wherein the imaging device is an average value or an integral value in any one predetermined time interval. The imaging apparatus according to claim 4 , wherein the predetermined time interval is extended when there is no temporary change after the calculated amount of deviation continuously changes. The focus control unit operates the driving unit when the calculated shift amount is larger than a first predetermined value that is an upper limit of an allowable range of the shift amount. The imaging device according to any one of 5 . The focusing control unit operates the driving unit based on the calculated evaluation value when the calculated shift amount is smaller than a first predetermined value that is an upper limit of the allowable range of the shift amount. the imaging apparatus according to any one of claims 1 to 5, characterized in that to determine whether to. The focus control unit operates the driving unit when the calculated fluctuation amount of the evaluation value is larger than a second predetermined value that is an upper limit of the allowable range of the fluctuation amount. Item 8. The imaging device according to Item 7 . 9. The imaging apparatus according to claim 8 , wherein the focusing control unit does not operate the driving unit when the calculated fluctuation amount of the evaluation value is smaller than the second predetermined value. The focus control means sets the drive speed of the drive means to the first speed when the calculated fluctuation amount of the evaluation value is larger than a second predetermined value that is an upper limit of the allowable range of the fluctuation amount. And when the calculated fluctuation amount of the evaluation value is smaller than the second predetermined value, the driving speed of the driving means is set to a second driving speed smaller than the first driving speed. The imaging device according to claim 6 . An evaluation value calculation step of calculating an evaluation value indicating a focus state of the optical image on the basis of the output of the photoelectric conversion means for outputting as an electric signal the optical image photoelectrically converted, against the in-focus position of the full Okasurenzu A method for controlling an imaging apparatus , comprising: a deviation calculating step for calculating a deviation amount and a deviation direction; and a control step for controlling movement of the focus lens, wherein the movement is resumed after the focus lens is once stopped. control method for an imaging apparatus which is characterized in that on the basis of whether or not the calculated shift amount and shift direction and the calculated evaluation value.