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Time-resolved single-photon counting two-dimensional imaging system and method

A single-photon counting and single-photon counter technology, applied in the field of very weak light detection, can solve the problems of high price, immature technology, low sensitivity of panel detectors, etc., and achieve the effect of small array scale

Active Publication Date: 2012-06-20
NAT SPACE SCI CENT CAS
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Problems solved by technology

However, bin detectors for single-photon detection are not only expensive, but can only be realized in a small number of wavelength bands, and the bin detectors have low sensitivity. contradiction

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  • Time-resolved single-photon counting two-dimensional imaging system and method
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  • Time-resolved single-photon counting two-dimensional imaging system and method

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specific Embodiment approach

[0117] According to the above time-resolved single photon counting imaging method, the specific embodiments of the present invention are as follows:

[0118] Such as figure 1 As shown, the extremely weak light source 1 emits the extremely weak light to trigger the trigger 2, so that the subsequent devices start to work normally, and then every t time interval (this time interval can be extremely short, it is expected to reach picosecond or even nanosecond level, in order to realize time-resolved) for one centralized sampling, and k times for each centralized sampling. In each time interval, the extremely weak light passes through the filter 3 to filter out the stray light and hits the continuously changing object (direct transmission is followed by transmitted light, oblique light is followed by reflected light), and then passed through the optical imaging system 4 Imaging on the DMD5, using DLP digital light processing technology to modulate the DMD5 random light and dark ma...

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Abstract

The invention provides a time-resolved single-photon counting two-dimensional imaging system and a time-resolved single-photon counting two-dimensional imaging method and belongs to the technical field of extremely-weak light detection. A trigger 2 is triggered to start sampling, centralized sampling is performed at t time intervals, and measurement and counting are performed if light comes at the intervals, so that time resolving of an extremely-weak light object is realized, and a time sequence image is generated. Imaging is performed on the basis of a compressive sensing (CS) theory, a digital micro-mirror device (DMD5) performs linear random projection on a compressible two-dimensional image, the compressible two-dimensional image is optically modulated and then synchronously detected by using a single-photon counter, and a high-resolution extremely-weak light image can be reconstructed by a small amount of sampling operation. The measurement process is linear and non-adaptive, the reconstruction process is non-linear, and the invention has the advantages of high generality, robustness, expandability, superposition and computation asymmetry, and can be widely applied to the fields of life science, medical imaging, data acquisition, communication, astronomy, military affairs, hyper-spectral imaging and quantum measurement.

Description

technical field [0001] The invention relates to the technical field of extremely weak light detection, in particular to a time-resolved single-photon counting two-dimensional imaging system and method. Background technique [0002] The present invention is an improvement and innovation based on previous work. In this field, our institute already has a patent "A Single Photon Counting Imaging System and Its Method" (application number or patent number: 201110103559.3, applicant or patentee: Space Science and Application Research Center of Chinese Academy of Sciences), the The patent is the work done by the predecessors of this research laboratory. The purpose is to do single photon counting imaging. Two-dimensional imaging of extremely low-light objects at the photon level, but there are still certain technical defects. For example, the system provided by the patent does not have a trigger, and can only image static objects. It lacks time resolution, and the algorithm used i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03K21/00
Inventor 俞文凯翟光杰王超
Owner NAT SPACE SCI CENT CAS
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