High-speed calculation correlated imaging system and method based on preset modulatable light source

Abstract

The invention relates to a high-speed calculation correlated imaging system and method based on a preset modulatable light source.The imaging system comprises the light source, an electro-optical modulator array modulating system, a single-point light intensity detector, a data collecting module and a data synchronizing and processing module; the electro-optical modulator array modulating system is used for performing random binary intensity modulation on light emitted by the light source to form a light field with intensity distributed in a random fluctuation mode in free space; the single-point light intensity detector is used for detecting total light intensity obtained after the light field is reflected or transmitted by a target object to be detected and converting the total light intensity into electric signals related to the total light intensity; the data collecting module is used for obtaining the electric signals and obtaining total light intensity fluctuation information, the data synchronizing and processing module is used for controlling data synchronization between the electro-optical modulator array modulating system and the data collecting module and then conducting correlation calculation to obtain an image of the target object to be detected.The electro-optical modulator array modulating system is used for modulating light, the modulation speed is high, the refreshing frequency effect of the preset light source is improved, the refreshing frequency is at least improved to megahertz order, and imaging result and imaging quality are improved.

Description

【Technical field】 [0001] The invention belongs to the technical field of quantum correlation imaging, and in particular relates to a high-speed computing correlation imaging system and an imaging method based on a preset modulating light source. 【Background technique】 [0002] Correlation imaging is a new research topic emerging in the past ten years. The earliest correlative imaging scheme used entangled two-photons as the light source and had the peculiar characteristics of non-localized imaging and breaking the Rayleigh diffraction limit, and thus received widespread attention. In the recent research progress, people have broken the limitation of entangled light sources, and used the more ubiquitous and easier-to-obtain pseudothermal light sources and thermal light sources to realize correlation imaging, and obtained the similar properties of correlation imaging with entangled light sources and aroused the academia extensive discussion. [0003] Correlation imaging incl...

AI Technical Summary

Problems solved by technology

[0006] 1. The DMD chip used in traditional computing ghost imaging has a low frame rate when generating speckle fields in practical applications, only 50-60Hz, that is, 50-60 speckle field distribution patterns are generated per second

In the specific calculation of ghost imaging experiments, at least a thousand sheets of speckle distribution patterns are required to obtain a clear image. The imaging time is too long, and the complexity of the imaged object will also make the required speckle distribution pattern Increase

[0007] 2. The spatial light modulator (SLM), the light modulation device used in traditional computational ghost imaging, is a liquid crystal light valve, such as figure 2 As shown, its modulation speed is only 500Hz, which is far from meeting the needs of fast imaging in practical applications.

[0008] 3. Spatial resolution detector 8 (CCD) is a detector with position information, and the cost is relatively high

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