A digital holographic phantom imaging system using a single-pixel barrel detector and its working method

Abstract

The invention relates to a digital holography ghost imaging system by adopting a single-pixel or bucket detector and a working method thereof. The system comprises a digital holography recording unit, a hologram writing / reading unit, a computational ghost imaging unit and a system control and signal processing unit, wherein the digital holography recording unit generates a hologram of a target object and the hologram serves as writing light to be written in the hologram writing / reading unit; and the computational ghost imaging unit generates structured light which can be dynamically refreshed and carries reference matrix encoding information, and the structured light serves as reading light to read the hologram, and the hologram is received by the single-pixel or bucket detector. The method of the invention combines the ghost imaging and the digital holography, and the problems that the size of the target surface of a plane array photoelectric detector and the resolution are insufficient and plane array photoelectric detectors of certain wave bands are hard to make as a result of limitations such as the material and the technology in the digital holography technology applications can be solved.

Description

technical field [0001] The invention relates to a digital holographic phantom imaging system using a single-pixel barrel detector and a working method thereof, belonging to the technical field of photoelectric imaging, display and detection. Background technique [0002] Holography (Holography) is a British-Hungarian scientist Gabor invented in 1948, based on the interference and diffraction between coherent light waves (where "light waves" can be electromagnetic waves of other wavelengths), can record and reproduce the amplitude and phase information of light waves. It is widely used in the fields of information recording and storage, imaging and display, interferometric measurement and detection, information security and anti-counterfeiting identification. Since the 1960s, the development of laser light sources has provided a good coherent light source for the research and application of holography. Optical holography has entered a period of vigorous development, and diffe...

AI Technical Summary

Problems solved by technology

[0003] In recent years, with the development of computers, especially high-resolution area array photodetectors, digital holography technology and its applications have received more and more attention, but there are still two problems in practical applications: (1) area array The target surface size and resolution of photodetectors are far lower than optical holographic recording media, which makes digital holography very limited in terms of imaging resolution, field of view and application fields; (2) in certain wavebands (such as infrared, Terahertz, etc.), due to the limitations of materials and processes, it is still difficult to produce large-size, high-resolution area array devices for digital holographic recording

[0013] Both of the above two patents use the phase iteration method to obtain the three-dimensional information of the object. It is necessary to add a pseudo-random phase to the pulsed light. After multiple measurements, complex calculations are required for data processing.

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