Single-pixel phase imaging method and device based on amplitude modulation

Abstract

The invention provides a single-pixel phase imaging method and a device based on amplitude modulation. The method comprises the steps of acquiring multiple amplitude modulation patterns; sequentiallyloading the amplitude modulation patterns to a spatial light modulator; sequentially projecting a preset modulated light source to a target object according to the amplitude modulation patterns by thespatial light modulator; sequentially acquiring corresponding multiple center light intensities of an optical fourier plane by a single-pixel detector after the amplitude modulation patterns are respectively projected to the target object; calculating the amplitude modulation patterns and the corresponding center light intensities according to an alternately projected phase recovery optimizationalgorithm; acquiring amplitude phase information of the target object; and determining an image of the target object according to the amplitude phase information. The single-pixel phase imaging methodhas the significant advantages of simple light path, high light efficiency, high robustness, high signal-to-noise ratio, wide spectral range, low cost, flexible system configuration and the like.

Description

technical field [0001] The invention relates to the technical field of computational imaging, in particular to a single-pixel phase imaging method and device based on amplitude modulation. Background technique [0002] The acquisition of light wave phase information is an important topic in optical measurement, and has irreplaceable application value in the fields of biomedicine and material science. When a beam of light passes through an object, its intensity and phase will be modulated by the object at the same time, but only the intensity information can be directly recorded by the detector, and the phase information is usually lost due to the limited response speed of the detector. However, the phase of the light wave is the embodiment of the surface shape, thickness and detail information of the object, which often contains more information than the intensity. Phase imaging is a technology for observing the intensity and phase of the light field. It adopts a specific m...

AI Technical Summary

Problems solved by technology

[0006] For this reason, the first purpose of the present invention is to propose a single-pixel phase imaging method based on amplitude modulation, which solves the problem that the single-pixel phase imaging method in the prior art needs more phase modulation structured illumination, the optical path is complicated, and the optical efficiency is low. Poor, direct inverse reconstruction, technical problems of poor robustness, with high signal-to-noise ratio, wide spectral range, low cost, flexible system configuration, etc.

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