Patent ID: 7676147
Filing Date: 2010-03-09
Classification: G03B

Abstract:
1. A focus detection apparatus for detecting a phase difference between a pair of images comprising: a first image-forming lens unit which includes a first pair of lens portions forming a first pair of images on a first pair of light-receiving element arrays with luminous fluxes from an image-pickup optical system after the luminous fluxes pass through a first pair of apertures making a pair in a first direction; and a second image-forming lens unit which includes a second pair of lens portions forming a second pair of images on a second pair of light-receiving element arrays with luminous fluxes from the image-pickup optical system after the luminous fluxes pass through a second pair of apertures making a pair in a second direction, wherein a midpoint between the second pair of lens portions is located between the first pair of lens portions and displaced from a midpoint between the first pair of lens portions.