High-precision multispectral integrated target for LED illumination and matched optical detecting method

The invention provides a high-precision multispectral integrated target for LED (Light Emitting Diode) illumination and a matched optical detecting method. The high-precision multispectral integrated target comprises a multispectral integrated target plate, a current controllable LED light source and a collimation system, wherein the multispectral integrated target plate is mounted on a focal plane of the collimation system; the current controllable LED light source is used for supplying infrared and white glimmer illumination to the multispectral integrated target plate; a Cassegrain collimation system subjected to aberration optimization, tolerance analysis and thermal design is taken as the collimation system; cross division lines and four different resolution ratio detection patterns are integrated on the multispectral integrated target plate. According to the high-precision multispectral integrated target for LED illumination, the multispectral integrated target plate is combined with the current controllable LED light source, so that the problems of frequently exchanging and repeatedly adjusting the target plate and the light source in one-target exclusive use are solved, and the Cassegrain collimation system subjected to aberration optimization and thermal design is adopted, so that the imaging quality is optimized, the volume mass of the system is reduced and the system is higher in tolerance and thermal adaptability.