For three-tube cameras, the image of three camera tubes must be accurately coincident together to get high-resolution, color-restored images. However, because the camera tubes are not identical, and the location is difficult to place very precise, so there will be coincident error.
Generally, the offset of the Red Road or blue road relative to the Green Road is expressed as a percentage of the height of the screen. Tube type by region: Ⅰ: 0.05%, Ⅱ: 0.1%, Ⅲ: 0.15%. Slice type: The whole area is less than 0.05%.