Patent ID: 8102516
Filing Date: 2012-01-24
Classification: G01C,G01S

Abstract:
1. A test method for evaluating accuracy of a distance measured by a compound-eye distance measuring apparatus which measures a distance to a measurement object based on a disparity in a first baseline direction and a disparity in a second baseline direction that are obtained from at least three imaging optical systems, the first baseline direction and the second baseline direction being different from each other, said test method comprising: placing a chart on optical axes of the imaging optical systems at a predetermined distance from the imaging optical systems; measuring a distance to the chart by the compound-eye distance measuring apparatus; and calculating a difference between the predetermined distance and the measured distance, and evaluating whether or not the calculated difference is within a predetermined value range, wherein, on the chart, elements in a predetermined geometric pattern are two-dimensionally arranged in a first arrangement direction and a second arrangement direction, the first arrangement direction being tilted by a predetermined angle with respect to the first baseline direction, and the second arrangement direction being tilted by a predetermined angle with respect to the second baseline direction, and in said measuring, the distance to the chart is measured based on displacement of each of imaging positions of elements in a same geometric pattern in each of the baseline directions, the same geometric pattern being formed on each of image sensor planes of a corresponding one of the at least three imaging optical systems.