FIELD: physics.
SUBSTANCE: device includes an image sensing unit, a control unit and a calculation unit. The image sensing unit performs photoelectric transformation of the image of the object. The control unit reads the image signals from the pixels in the first and second zones. The calculation unit calculates the focus values based on the signals of the second pixel zone when the focus lens is moved and determines the position of the best focusing. The device includes a block of photometry and evaluation unit which detects the presence of a point source to detect focus. In addition, the device may include a team block and the block count, decorated with the possibility of counting among image signals to detect focus among those signals that have a brightness value greater than or equal to the pre-defined value. Additionally, the apparatus includes a flicker detection unit configured to detect the presence or absence of flicker and flicker frequency.
EFFECT: high image quality of obtained images.
15 cl, 25 dwg
