The invention provides a time-resolved single-photon or ultra-weak light multi-D imaging spectral system and a time-resolved single-photon or ultra-weak light multi-D imaging spectral method. On the one hand, in order to realize rough time resolution, the invention provides a time-resolved single-photon counting 2D imaging system for forming color or grey imaging. Moreover, in order to realize high-precision time resolution, the multi-D imaging system provided in the invention mainly comprises a light source, an imaging spectral measurement unit, an electric detection unit, a system control unit and an algorithm unit, wherein the light carrying the information of an object is imaged on a spatial light modulator and randomly modulated according to the compressed sensing theory, the emergent light of a grating is collected by using a point or array single-photon detector, meanwhile, the number of photons and the photon arrival time are recorded, and reconstruction is carried out by using the compressed sensing algorithm and the related algorithm of the spectral imaging. The system has the advantages of single-photon detection sensitivity, high time resolution and wide spectral range, and can be widely applied in the areas of numerous new high-tech industries such as unicellular biophysics and material defect detection.
TIME-RESOLVED SINGLE-PHOTON OR ULTRA-WEAK LIGHT MULTI-DIMENSIONAL IMAGING SPECTRUM SYSTEM AND METHOD