FOCUS DETECTOR USING TWO-DIMENSIONAL IMAGING DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a focus detector using a two-dimensional imaging device which uses the two-dimensional imaging device, by which the detection of both longitudinal and lateral edges can be performed with one imaging device, also which can perform the range-finding of a large area, by which an object image is not required to be divided into two as the object image is divided into two with a phase difference system, by which data on the area of a photographing element can be efficiently utilized, and by which the same photographing element can use the data of the imaging device as not only AF but AE. ;SOLUTION: Micro lenses 3a having diameter including nine detection elements longitudinally and laterally arrayed on the two-dimensional CCD imaging device 4 are regularly arrayed. The data of the detection element on an optical axis part and the data of the detection element on four corners are not used, but the data on a longitudinal line detection element 7 and the data on a lateral line detection element 8 symmetrically arranged centering the optical axis are used. When the received light quantity of the detection elements of the respective lenses 3a in a symmetrical relation coincides each other, focusing is performed; and when the received light quantity of the detection elements in another positional relation coincides each other, that is front or rear focus.;COPYRIGHT: (C)1998,JPO