Single-pixel imaging system based on polarization correlated imaging

A related imaging and imaging system technology, applied in the radio wave measurement system, electromagnetic wave re-radiation, utilization of re-radiation, etc., can solve the problems of detection or imaging methods that are easy to be ignored, difficult to recover target information, difficult to perceive, etc., to achieve Achieve background suppression, overcome the low ability to resist complex background, and improve the effect of imaging contrast

Inactive Publication Date: 2014-05-07
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In these cases, traditional correlative imaging is difficult to recover the target information
[0003] Polarization, as another important characteristic of light, is easily ignored in traditional detection or imaging methods because it is not directly perceived by the human eye.

Method used

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  • Single-pixel imaging system based on polarization correlated imaging
  • Single-pixel imaging system based on polarization correlated imaging
  • Single-pixel imaging system based on polarization correlated imaging

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Experimental program
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Embodiment 1

[0045] Such as figure 2 As shown, a single-pixel system based on linear polarization correlation imaging under complex background conditions, including: 632.8nm continuous He-Ne laser 12, digital micromirror array (DMD) 10, linear polarizer 11 (as a polarizer), Lens, linear polarizer 11 (as an analyzer), 632.8nm filter 6, photodiode 13 and synchronous control and data acquisition module 8. The digital micromirror array contains 1024×768 micromirrors, and N=20000 (the value of N is greater than or equal to 1000 can also be implemented in this embodiment) pre-generated light field random graph P i (x, y), and modulate the laser light incident on the digital micromirror array (DMD) 10 at a speed of 100 frames per second, and the linear polarizer 11 (as a polarizer) is set to be vertically polarized, so that the outgoing light is light The vertically polarized light randomly distributed in the field is irradiated on the target object 9 . The target is a key in a large piece of ...

Embodiment 2

[0050] Such as image 3 As shown, this embodiment is a single-pixel imaging system based on linear polarization correlation imaging for targets with different reflection characteristics. The 500nm wavelength LED light source 14 is irradiated to the digital micromirror array, and the vertically polarized linear polarizer 11 is irradiated on the target object 9. The target is composed of four letters "SJTU", wherein S and T are cut from tinfoil, J and U is cut from white cardboard. In traditional correlation imaging, the fluctuation of the reflected light field is dominated by S and T, and the information of J and U is overwhelmed so that it cannot be recovered.

[0051] The polarizer at the receiving end is divided into two paths by a polarization beam splitter (PBS) 15, vertically polarized and horizontally polarized, and the light intensity is collected through two photodiodes 13, and processed and restored by the post-data module. Other configurations are similar to those ...

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Abstract

The invention discloses a single-pixel imaging system based on polarization correlated imaging. The single-pixel imaging system based on polarization correlated imaging comprises a light source, a modulator, a polarizer, a lens, a polarization analyzer, a filtering sheet, a single-point light intensity detector and a synchronous control and data acquisition module. An emitting end enters the modular through the light source, so that a light field with the light intensity distribution fluctuating randomly is generated, polarization of emergent light is modulated through the polarizer, and the emergent light is emitted to a detection target; the light reflected back through a target object is converged by a receiving end through the lens and the light is converged at the single-point light intensity detector through the polarization analyzer and the filtering sheet; the synchronous control and data acquisition module synchronously controls the emitting end and the receiving end, conducts data acquisition and resolves an association algorithm. According to the single-pixel imaging system based on polarization correlated imaging, the target is detected, identified and imaged through polarization information and intensity correlation of the light, the target detection identification rate and the imaging contrast ratio of traditional correlated imaging are improved, and the system has the advantages of being resistant to complicated background interference and the like.

Description

technical field [0001] The invention relates to the field of target detection, identification and imaging, in particular to a single-pixel imaging system based on polarization correlation imaging. Background technique [0002] Target detection, recognition and imaging have important applications in various aspects such as military detection, intelligent monitoring, and biomedicine. Correlation imaging, or ghost imaging, as an emerging imaging method, has been greatly developed in recent years. Compared with traditional imaging, it has the advantages of single-pixel imaging, no need for spatial array detectors, strong anti-scattering medium interference, and improved imaging resolution. It is playing an increasingly important role in practical applications. However, traditional correlation imaging receives the total light intensity reflected by the target and the background for correlation recovery. When the target is in a complex and wide background, the background light i...

Claims

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Application Information

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IPC IPC(8): G01S17/89
CPCG01S7/481G01S17/89
Inventor 朱泳超石剑虹曾贵华
Owner SHANGHAI JIAO TONG UNIV
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