Patent ID: 8723130
Filing Date: 2014-05-13
Classification: G01J

Abstract:
1. A single-photon counting imaging system, for realizing two-dimensional imaging of an ultra-weak light object at single-photon level by adopting the CS theory and the DLP technology, comprising: a light filter, a first lens, a digital micro-mirror device (DMD) control system, a second lens, a single-photon counter and a data processing unit, wherein the combination of the DMD, the first lens and the second lens is used for converting two-dimensional image data into a one-dimensional data sequence so as to complete compressive sampling of signals to be measured, i.e., firstly the stray light in an ultra-weak light is filtered by the light filter, after which the ultra-weak light is imaged at the DMD control system through the first lens, and the DMD control system controls the probability that photons are reflected to the second lens, and the second lens controls the focusing of the photons; and the combination of the data processing unit and the single-photon counter is used to complete sparse reconstruction, wherein the data processing unit converts the number of the photons counted by the single-photon counter during a certain period of time into the probability of detected photon counts, as the measured value, a photon density image is reconstructed by adopting an optimization algorithm applied to the measured value as well as the measurement matrix on the DMD control system, thereby solving out a two-dimensional image.