Automobile lamp projection shrinkage MTF detection system

The utility model discloses an automobile lamp projection distance reduction MTF (modulation transfer function) detection system, which comprises a mobile platform, a distance increasing magnifier and a detected module which are sequentially arranged, the distance-increasing magnifying lens comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens which are sequentially arranged from the camera to the tested module along the optical axis, the first lens is a convex-concave lens, the second lens is a concave-convex lens, the third lens and the fifth lens are biconcave lenses, the fourth lens and the sixth lens are biconvex lenses, and the third lens and the fifth lens are biconvex lenses. Light emitted by the tested module passes through the distance increasing magnifier and then is received by the camera to form a projection graph, and the form of the projection graph on the CCD of the camera is analyzed through software, so that the clear condition of the graph can be