Abstract: The imaging ray will have a small displacement when the space between a pair of light wedges is changed. A light wedge regulation device is added in the detector of double CCD image stitching, which includes two pairs of light wedges, one pair is used for the image regulation in horizontal direction, while the other is used for image regulation in vertical direction. A light wedge regulation device was designed and manufactured. It is incorporated in the detector for tuning double CCD image stitching. The assembly and tuning process shows that the regulation device does not have any negative impact on the original optical system, and it can realize image displacement with accuracy better than 0.001mm. It reduces the detector assembly and tuning complexity for double CCD image stitching, improves image stitching quality and saves the production cost.