CAMERA UNIT CALIBRATING APPARATUS AND CALIBRATING METHOD

A camera unit calibrating apparatus performs a predetermined measurement based on images acquired by imaging the same object from different viewpoints using cameras. The apparatus includes a collimator unit and a control unit that controls the collimator unit. The collimator unit includes collimators corresponding to the cameras respectively, collimator driving devices corresponding to the collimators respectively, a support unit that supports the collimators to allow the collimators to be translated individually within a predetermined plane, and a collimator control unit that controls the collimators and the collimator driving devices. The control unit controls each of the collimator driving devices to individually set a corresponding one of the collimators to a predetermined position and orientation, and cause each of collimated images produced by the collimators to be formed at a desired position within a range of an imaging area of a corresponding one of the cameras.