Patent ID: 6700651
Filing Date: 2004-03-02
Classification: G01C,G02B

Abstract:
A distance/defocus detection device, comprising:a sensor unit formed of a first sensor and a second sensor, the sensor unit receiving an object image in each of a plurality of areas set in a frame; a calculator which calculates the distance to the object or an amount of defocus in each of the plurality of areas on the basis of a correlation between the image received by the first sensor and the image received by the second sensor, the correlation being performed for the plurality of areas in a prescribed order, and the correlation being determined while shifting an image signal of the first sensor relative to an image signal of the second sensor; and a shift-range determination circuit which, after the correlation calculation is performed for a predetermined area of the plurality of areas, determines a shift range of the correlation calculation for a next area in the prescribed order of the plurality of areas on the basis of the result of the correlation calculation for the predetermined area.