| 摘要 |
PROBLEM TO BE SOLVED: To prevent an error of distance measuring, simplify the manufacturing process, and facilitate the management and calibration of a distance information acquisition device. SOLUTION: A pattern is projected to an object T to be picked up as a target for distance measurement from a pattern projector PAT, and an image picked up by an image sensing device CAM1 (CAM2) is used to acquire a distance information. In such a technology, a sub pattern SP1 is formed of at least three kinds of pattern pieces that can be optically discriminated, and a computer COM uses a pattern P1 obtained from the combination of the sub pattern SP1 to specify what sub pattern SP1 of the pattern P1 the pattern piece belongs to, according to the optical characteristic and positional coordinate of the pattern piece shown on the image, and the obtained result is used to compute a distance information to the target T.
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