| 摘要 |
A range finder includes a plurality of imaging elements, a plurality of optical systems configured to form subject images on the imaging elements, respectively and a distance calculator configured to calculate a distance to a subject based on imaging data output from the imaging elements on which the subject image is formed, wherein the distance calculator is configured to search a position of a comparative image having a high correlation with a standard image in imaging data output from the other imaging element relative to the standard image in an area obtained from imaging data output from one imaging element, the position of the comparative image being searched in a direction of a base length of the imaging elements, to calculate a relative positional difference between the standard image and the comparative image in the imaging data, and to calculate the distance to the subject by a triangulation system based on the calculated relative positional difference, and the distance calculator is configured to perform searching of the comparative image in the same direction as the base length while shifting in a direction vertical to the base length by a predetermined position, to determine whether or not the relative positional difference between the standard image and the comparative image in the imaging data calculated by the searching is smaller than a predetermined value, to use the calculated relative positional difference for range-finding calculation when the calculated relative positional difference is smaller than the predetermined value and not to use the calculated relative positional difference for range-finding calculation when the calculated relative positional difference is larger than the predetermined value. |
