System and method for counting and imaging single photons by aid of complementary measurement
A technology of single photon counting and imaging method, which is applied in the field of extremely weak light detection, can solve the problems of simultaneous detection and low algorithm precision, and achieve the effects of high resolution, reduced storage space, and high reconstruction quality
Active Publication Date: 2014-11-12
NAT SPACE SCI CENT CAS
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[0010] The purpose of the present invention is to solve the problems of simultaneous detection of visible light and near-infrared light, low algorithm precision, sensitivity, dimension, signal-to-noise ratio, etc., thereby providing a complementary measurement single-photon counting imaging system based on compressed sensing theory , using complementary measurement technology to collect the reflected light of the two arms of the DMD at the same time, and use the visible light single-photon point detector and the near-infrared light single-photon point detector to detect respectively, first sample and then reconstruct
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[0041] The present invention will be further described in detail below in conjunction with the accompanying drawings.
[0042] A single-photon counting imaging system for complementary measurement proposed by the present invention is characterized in that the single-photon counting imaging system adopts compressed sensing theory and complementary measurement technology, and uses visible light single-photon point detectors, near-infrared light single-photon point The detector is used as a detection element to realize the simultaneous detection of single-photon-level visible light and near-infrared grayscale images. The single-photon counting imaging system includes: optical imaging components, spatial light modulators, and two sets of converging light-receiving components , visible light single-photon point detector, near-infrared light single-photon point detector and multi-channel counter;
[0043] Among them, the extremely weak light is imaged on the spatial light modulator ...
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The invention provides a system and a method for counting and imaging single photons by the aid of complementary measurement. The system comprises an optical imaging component, a spatial light modulator, two groups of light converging and receiving components, a visible-light single-photon point detector, a near-infrared single-photon point detector and a multi-channel counter. The method includes steps that light with object information is imaged on the spatial light modulator; visible light components and near-infrared light components in the image are respectively regarded as one-dimensional column vectors, are modulated by the spatial light modulator via measurement matrixes, and are respectively reflected to directions of two arms; the visible light components and the near-infrared components on the two arms are respectively detected by the visible-light single-photon point detector and the near-infrared single-photon point detector; numbers of photons are counted to be used as measurement values; and visible light gray images and near-infrared gray images are simultaneously rebuilt by related compressive sensing algorithms according to matrix complementary characteristics of the two arms. By the aid of the method which realizes complementary detection and acquires plane information by point sampling, luminous flux and signal-to-noise ratio can be greatly increased, measurement scale can be reduced, and an ideal imaging effect can be achieved.
Description
technical field [0001] The invention relates to the technical field of extremely weak light detection, in particular to a complementary measurement single photon counting imaging system and method. Background technique [0002] In emerging high-tech fields such as biological detection, astronomical observation, night vision observation, extremely weak light detection, concentration detection, remote sensing imaging, medical imaging, and monitoring, it is not only necessary to detect extremely weak light, but also to analyze the component distribution of specific bands. The detection of visible light alone is already difficult to meet the demand. Scientists need to know the characteristic information of the near-infrared light band more often. However, it is difficult for existing instruments to achieve high-precision resolution of extremely weak light objects, and it is even more difficult to achieve extremely weak light detection. Simultaneous detection and analysis of visi...
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IPC IPC(8): G01J3/28
Inventor 翟光杰王超赵清俞文凯刘雪峰
Owner NAT SPACE SCI CENT CAS