Patent ID: 8237097
Filing Date: 2012-08-07
Classification: G02B,G03B,H04N

Abstract:
1. A focus detecting apparatus comprising: a micro lens array arranged with a plurality of micro lenses; a photo-detector that has detecting elements provided in correspondence with the micro lenses and receives light flux from an optical system via the micro lenses; a center detecting means that detects a center position of each micro lens from a position of detecting element having conjugate relationship with a pupil position of the optical system; an image generating means that generates a two-dimensional image from the center position of each micro lens and an output of the photo-detector; a contrast detecting means that detects contrast values of image signal of the two-dimensional image; a calculation means that calculates an integrated value to be obtained by accumulating the contrast values for each of a plurality of partial images from the two-dimensional image; and a focus detecting means that detects a focus adjustment status by calculating an image shift amount caused from light fluxes having passed through different pupil areas of the optical system based on output of the detecting elements corresponding to any of the partial images from which a maximum value is obtained among the integrated values calculated by the calculation means.