技術摘要（英）
A adjustment component of a scanning device includes a plurality of penetrating plates and a reflecting plate. The sizes of the penetrating plates are different, and the penetrating plates are arranged in a stepped shape along the thickness direction, and are divided into multiple penetrating areas according to the number of overlapping layers of the penetrating plates. The penetration of these penetrating areas is different, and the penetration of these penetrating areas is inversely proportional to the number of overlapping layers of the penetrating plates. These penetrating areas are used for light beams of predetermined wavelengths to penetrate. The reflecting plate is arranged on one side of the thickness direction of one of the penetrating plates. The reflecting plate has a plurality of first hollow grooves, and the sizes of the first hollow grooves are different, and the reflecting plate is used for shielding light beams of a predetermined waveband.