SINGLE PHOTON-COUNTING IMAGING SYSTEM AND METHOD THEREOF

摘要

The invention relates to a single-photon counting imaging system and a single-photon counting imaging method. The system comprises a light filter, a first lens (1), a digital micro-mirror device (DMD) control system, a second lens (2), a single-photon counter and a data processing unit, wherein the DMD together with the first lens (1) and the second lens (2), is used for converting two-dimensional image data into a one-dimensional sequence to complete compressive sampling of signals to be measured; the stray light in the ultra-weak light is filtered through the light filter, after which the ultra-weak light forms an image at the DMD control system through the first lens (1), the DMD control system controls the probability that photons are reflected to the second lens (2) and the second lens (2) controls the focusing of the photons; and the data processing unit together with the single-photon counter to complete sparse reconstruction, the data processing unit converts the number of photons counted by the single-photon counter within a certain period of time into the probability of detected photon counts, as the measured value, and a photon density image is reconstructed by adopting an optimization algorithm applied to a measurement matrix on the DMD control system and the measured value, thereby solving out the two-dimensional image.