Autofocus apparatus

Abstract

An autofocus apparatus with a photographic optical system having a movably disposed focus adjusting lens, an optical element to split light beams received from an object, a plurality of image forming lenses to form images from portions of the split light beams, a plurality of focusing estimating portions to create focusing data for focusing the image of the object on the corresponding image forming lenses, a data detecting device to detect data for focusing the image, a data creating device to correct the detected focusing data, a selecting portion to select from among the focusing estimating portions, and a moving device to move the focus adjusting lens.

1 . An autofocus apparatus comprising: 
 a photographing optical system having at least a focus adjusting lens disposed movably and an image forming lens for forming, into an image, light beams incident on said focus adjusting lens and emerging from an object;    a plurality of focusing estimating devices for creating focusing data for focusing an image formed on a predetermined plane through said photographing optical system, upon the object;    a storage device stored with a correction value for the focusing data created by at least one of said plurality of focusing estimating devices;    a correcting device for correcting, with the correction value, the focusing data corresponding to the correction value stored in said storage device;    a selecting device for selecting at least one of said plurality of focusing estimating devices; and    a moving device for moving said focus adjusting lens on the basis of the focusing data created by said focusing estimating device selected by said selecting device, or the relevant corrected focusing data if the relevant focusing data has been corrected by said correcting device.