Single-photon spectral counting and imaging system and method for complementary measurement

Abstract

The invention provides a single-photon spectral counting and imaging system and method for complementary measurement. According to the system, a plurality of single-photon dot detection units corresponding to different wavelengths are respectively selected in a visible range and a near infrared range so as to form two linear arrays which are distributed in exit directions of two arms of a spatial light modulator together with a spectral light splitter. The method comprises the following steps that: the spatial light modulator reflects the light imaged on the spatial light modulator to the two arms and respectively collimates and splits the light, visible spectrum is taken by one arm, and near infrared spectrum is taken by the other arm, so that the light can be detected by the corresponding linear array of the single-photon detector. According to the wavelength information corresponding to a complementary matrix, count values and a channel, visible and near infrared color images can be rebuilt with a related compressed sensing algorithm and a spectrogram for wavelength-optical power can be counted for spectral analysis. The system and the method disclosed by the invention solve the problem that the existing imaging spectrograph cannot simultaneously detect spectra of the visible light and the near infrared light, and have the advantages of low dimension, high flux, high sensitivity, high resolution and the like.

Description

technical field [0001] The invention relates to the technical field of ultra-weak light imaging spectrum, in particular to a complementary measurement single-photon spectrum counting imaging system and method. Background technique [0002] In emerging high-tech fields such as spectral imaging measurement and analysis, biological detection, starry sky detection, night vision observation, extremely weak light detection, concentration detection, remote sensing imaging, medical imaging, monitoring, etc., it is not only necessary to detect extremely weak light, but also to detect several spectral The composition distribution analysis is carried out in the near-infrared band, and the imaging spectrum detection of visible light can no longer meet the demand. Scientists need to know the spectral information in the near-infrared band more often. In addition, existing imaging spectroscopy instruments are not sensitive to extremely weak light, and most of them use scanning methods, whi...

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to solve the problems of dimension scanning, poor reconstruction accuracy and insensitivity to extremely weak light in conventional spectral imaging methods in order to achieve the goal of simultaneously analyzing the spectral components of visible light and near-infrared light of the observed object, thereby providing a Single-photon spectral counting imaging system and method for complementary measurement

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