A wavelength division multiplexing based quantum imaging system and method
Patent Information
- Application Number
- CN202611145366.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-07-30
- Publication Date
- 2026-10-23
AI Technical Summary
[0005]本发明为了解决现有的量子成像技术需要较长的时间来采集足够的数据以重建图像的问题，提供一种基于波长复用的量子成像系统及方法
[0041]本发明提供了一种基于波长复用的量子成像系统及方法，通过对复色光信号中各个波长的光信号分别进行独立调制，之后重新组合成复色光并投影到被测物上，实现了量子成像技术中的波长复用，显著减少了重建图像所需的采样时间，提高了数据采集的效率，能够在不增加额外数据采集时间的情况下，增加样本数量，从而提高图像的对比度、噪声比，改善图像质量。
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Figure CN122962818A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the fields of quantum imaging and quantum information technology, specifically to a quantum imaging system and method based on wavelength multiplexing. Background Technology
[0002] Quantum imaging and quantum information technology are important application technologies for quantum internet, unmanned systems, intelligent sensing and intelligent agents, and rapid high-resolution imaging in quantum measurement and metrology. Quantum imaging is a technique that reconstructs images by utilizing the intensity correlation between two or more light beams. It does not require precise spatial distribution information on the object, and therefore has high robustness to optical distortion and scattering.
[0003] Existing quantum imaging techniques utilize two correlated light beams: one beam illuminates a "reference" spatially resolved detector, and the other beam illuminates the target object. A "bucket" detector collects signals proportional to the intensity of light transmitted, reflected, scattered, or converted by the object. Based on the light source, the main technological approaches to quantum imaging are categorized into entangled light sources and traditional thermal light sources. However, an ideal entangled photon source requires high brightness and high extraction efficiency. The technology for realizing entangled photon sources is relatively complex, requiring highly symmetrical quantum dots and precise control, which increases the difficulty of experiments and applications. In contrast, thermal light sources (which emit light through high-temperature thermal radiation) are relatively easy to obtain, have lower costs, are simpler to process data, are easier to implement, and are suitable for a wide range of applications.
[0004] Existing quantum imaging technologies require a long time to acquire enough data to reconstruct an image, which is a significant disadvantage for applications that require rapid imaging. When data acquisition time is limited, the reconstructed image may have a low signal-to-noise ratio, affecting image quality. Due to the long data acquisition time, existing quantum imaging technologies struggle to capture clear images of fast-moving objects. Summary of the Invention
[0005] To address the problem that existing quantum imaging technologies require a long time to acquire sufficient data for image reconstruction, this invention provides a quantum imaging system and method based on wavelength multiplexing.
[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows:
[0007] A quantum imaging system based on wavelength multiplexing includes a light source, a first beam splitting module, a second beam splitting module, a third beam splitting module, a first optical modulation module, a second optical modulation module, a third optical modulation module, an object to be imaged, and an image generation module; wherein,
[0008] The light source generates a first polychromatic light signal; the first polychromatic light signal includes a first light signal, a second light signal, and a third light signal with different wavelengths;
[0009] The first polychromatic light signal After passing through the first beam splitter, it is divided into the first optical signal. Second polychromatic light signal The second polychromatic light signal After passing through the second beam splitter, it is divided into a second optical signal. and third optical signal ;
[0010] The first optical signal, the second optical signal, and the third optical signal are respectively input into the first optical modulation module, the second optical modulation module, and the third optical modulation module for modulation. The modulated first optical signal, the second optical signal, and the third optical signal are input into the third beam splitting module and combined to form the third polychromatic optical signal.
[0011] The reflected light signal after the third polychromatic light signal illuminates the object to be imaged is received by the image generation module and the reconstructed image is obtained using a second-order correlation function.
[0012] In the above scheme, wavelength reuse in quantum imaging technology is realized by independently modulating the light signals of each wavelength in the polychromatic light signal, then recombining them into polychromatic light and projecting it onto the object under test. This significantly reduces the sampling time required to reconstruct the image, improves the efficiency of data acquisition, and increases the number of samples without increasing the additional data acquisition time, thereby improving the image contrast, noise ratio, and image quality.
[0013] Preferably, it also includes a first reflector, a second reflector, and a third reflector;
[0014] The first optical signal is input to the first optical modulation module after passing through the first reflector, and the third optical signal is input to the third optical modulation module after passing through the second and third reflectors in sequence.
[0015] Preferably, the first, second, and third beam splitting modules all employ dichroic mirrors.
[0016] Preferably, the first light modulation module, the second light modulation module, and the third light modulation module all use a high-temperature polycrystalline silicon liquid crystal panel.
[0017] Preferably, the first optical modulation module modulates the first optical signal using a first random binary pattern; the second optical modulation module modulates the second optical signal using a second random binary pattern; and the third optical modulation module modulates the third optical signal using a third random binary pattern.
[0018] The first modulated optical signal Second optical signal and third optical signal The third polychromatic light signal is combined in the third beam splitter module. (And form a superimposed random pattern); These are the modulation operators for different optical modulation modules;
[0019] The reflected light signal after the third polychromatic light signal illuminates the object to be imaged The image generation module receives the image and uses a second-order correlation function to obtain the reconstructed image. Among these, This is the reflection operator. The reflected signal corresponding to the first optical signal is... The reflected signal corresponding to the second optical signal is The reflected signal corresponding to the third optical signal is .
[0020] Preferably, the image generation module includes a detection module and a processing module;
[0021] The reflected light signal after the third polychromatic light signal illuminates the object to be imaged is received by the detection module and converted into an electrical signal. The reconstructed image is obtained by the processing module using a second-order correlation function based on the intensity of the electrical signal.
[0022] Preferably, the detection module includes a first photodetector, a second photodetector, and a third photodetector; wherein,
[0023] The first photodetector is used to detect an optical signal with the same wavelength as the first optical signal.
[0024] The second photodetector is used to detect an optical signal with the same wavelength as the second optical signal.
[0025] The third photodetector is used to detect optical signals with the same wavelength as the third optical signal.
[0026] Preferably, the second-order correlation function is:
[0027]
[0028] in, To reconstruct the pixel values of the image, The wavelength reflected by the object to be imaged is The intensity of the light signal, In multiple measurements The average value, The wavelength that illuminates the object to be imaged is The intensity of the light signal, In multiple measurements The average value of (x,y) is the position coordinate of the object to be imaged, i=1,2,3.
[0029] A quantum imaging method based on wavelength multiplexing includes the following steps:
[0030] S1: The first polychromatic light signal is generated by the light source;
[0031] The first polychromatic light signal includes a first light signal, a second light signal, and a third light signal with different wavelengths;
[0032] S2: The first polychromatic light signal is split into a first light signal and a second polychromatic light signal after passing through the first beam splitting module;
[0033] S3: The second polychromatic light signal is split into a second light signal and a third light signal after passing through the second beam splitting module;
[0034] S4: Modulate the first optical signal, the second optical signal, and the third optical signal respectively;
[0035] S5: Combine the modulated first optical signal, second optical signal and third optical signal to form a third polychromatic optical signal;
[0036] S6: Obtain the reconstructed image based on the reflected light signal after the third polychromatic light signal illuminates the object to be imaged.
[0037] Preferably, in step S6, the reconstructed image is obtained through the following second-order correlation function:
[0038]
[0039] in, To reconstruct the pixel values of the image, The wavelength reflected by the object to be imaged is The intensity of the light signal, In multiple measurements The average value, The wavelength that illuminates the object to be imaged is The intensity of the light signal, In multiple measurements The average value of (x,y) is the position coordinate of the object to be imaged, i=1,2,3.
[0040] Beneficial technical effects of the present invention:
[0041] This invention provides a quantum imaging system and method based on wavelength multiplexing. By independently modulating the light signals of each wavelength in the polychromatic light signal, and then recombining them into polychromatic light and projecting it onto the object under test, wavelength multiplexing in quantum imaging technology is realized. This significantly reduces the sampling time required for image reconstruction, improves the efficiency of data acquisition, and can increase the number of samples without increasing the additional data acquisition time, thereby improving the image contrast, noise ratio, and image quality. Attached Figure Description
[0042] Figure 1 This is a schematic diagram of the module connection of the present invention;
[0043] Figure 2 This is a schematic diagram of the overall structure of the present invention;
[0044] Figure 3 This is a schematic diagram illustrating the implementation steps of the technical solution of the present invention;
[0045] The components are: 1. Light source; 2. First beam splitting module; 3. Second beam splitting module; 4. Third beam splitting module; 5. First light modulation module; 6. Second light modulation module; 7. Third light modulation module; 8. Object to be imaged; 9. Image generation module; 901. Detection module; 902. Processing module; 10. First reflector; 11. Second reflector; 12. Third reflector. Detailed Implementation
[0046] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the embodiments. However, the scope of protection of this invention is not limited to the specific embodiments described below.
[0047] Example 1
[0048] like Figure 1 As shown, a quantum imaging system based on wavelength multiplexing includes a light source 1, a first beam splitting module 2, a second beam splitting module 3, a third beam splitting module 4, a first optical modulation module 5, a second optical modulation module 6, a third optical modulation module 7, an object to be imaged 8, and an image generation module 9; wherein,
[0049] The light source 1 generates a first polychromatic light signal; the first polychromatic light signal includes a first light signal, a second light signal, and a third light signal with different wavelengths;
[0050] The first polychromatic light signal is split into a first light signal and a second polychromatic light signal after passing through the first beam splitting module 2; the second polychromatic light signal is split into a second light signal and a third light signal after passing through the second beam splitting module 3.
[0051] The first optical signal, the second optical signal, and the third optical signal are respectively input into the first optical modulation module 5, the second optical modulation module 6, and the third optical modulation module 7 for modulation. The modulated first optical signal, the second optical signal, and the third optical signal are input into the third beam splitting module 4 and combined to form the third polychromatic optical signal.
[0052] The reflected light signal after the third polychromatic light signal illuminates the object 8 to be imaged is received by the image generation module 9 and a reconstructed image is obtained using a second-order correlation function.
[0053] In the specific implementation process, by independently modulating the light signals of each wavelength in the polychromatic light signal, and then recombining them into polychromatic light and projecting it onto the object under test, wavelength reuse in quantum imaging technology is realized. This significantly reduces the sampling time required for image reconstruction, improves the efficiency of data acquisition, and can increase the number of samples without increasing the additional data acquisition time, thereby improving the contrast and noise ratio of the image and improving the image quality.
[0054] Example 2
[0055] like Figure 2 As shown, a quantum imaging system based on wavelength multiplexing includes a light source 1, a first beam splitting module 2, a second beam splitting module 3, a third beam splitting module 4, a first optical modulation module 5, a second optical modulation module 6, a third optical modulation module 7, an object to be imaged 8, and an image generation module 9.
[0056] More specifically, it also includes a first reflector 10, a second reflector 11, and a third reflector 12;
[0057] More specifically, the first beam splitting module 2, the second beam splitting module 3, and the third beam splitting module 4 all employ dichroic mirrors;
[0058] More specifically, the first optical modulation module 5, the second optical modulation module 6, and the third optical modulation module 7 all use high-temperature polycrystalline silicon liquid crystal panels;
[0059] in,
[0060] The light source 1 generates a first polychromatic light signal; the first polychromatic light signal includes first light signals with different wavelengths (wavelength is...). ), second optical signal (wavelength is ) and the third optical signal (wavelength is );
[0061] The first polychromatic light signal After passing through the first optical splitter module 2, it is divided into the first optical signal. Second polychromatic light signal The first optical signal is transmitted along the transmission path of the first beam splitter 2 and, after being reflected by the first reflector 10, enters the first optical modulation module 5 for modulation.
[0062] The second polychromatic light signal The light is transmitted along the reflection path of the first beam splitter 2, and then split into a second optical signal after passing through the second beam splitter 3. and third optical signal ;
[0063] The second optical signal is transmitted along the reflection path of the second beam splitter 3 and then modulated in the second optical modulation module 6.
[0064] The third optical signal is transmitted along the transmission path of the second beam splitter 3, and after passing through the second reflector 11 and the third reflector 12 in sequence, it enters the third optical modulation module 7 for modulation.
[0065] In the specific implementation process, let the initial path state be... The reflection path and transmission path of the first beam splitter 2 are respectively and The function operator of the first beam splitter module 2 For the first optical signal The function can be expressed as For the second optical signal The function can be expressed as For the third optical signal The function can be expressed as .
[0066] Let the reflection path and transmission path of the second beam splitter module 3 be respectively... and The function of the second beam splitter module 3 is as follows: For the second optical signal The function can be expressed as For the third optical signal The function can be expressed as .
[0067] Let the output path of the third beam splitter be... Its function operator The first modulated optical signal The function can be expressed as For the second optical signal The function can be expressed as For the third optical signal The function can be expressed as .
[0068] More specifically, the first optical modulation module 5 modulates the first optical signal using a first random binary pattern; the second optical modulation module 6 modulates the second optical signal using a second random binary pattern; and the third optical modulation module 7 modulates the third optical signal using a third random binary pattern.
[0069] The first modulated optical signal Second optical signal and third optical signal The third polychromatic light signal is formed by combining the inputs into the third beam splitter module 4. (And form a superimposed random pattern); These are the modulation operators for different optical modulation modules;
[0070] The reflected light signal after the third polychromatic light signal illuminates the object 8 to be imaged The image is received by image generation module 9 and reconstructed using a second-order correlation function. This is the reflection operator. The reflected signal corresponding to the first optical signal is... The reflected signal corresponding to the second optical signal is The reflected signal corresponding to the third optical signal is .
[0071] More specifically, the image generation module 9 includes a detection module 901 and a processing module 902;
[0072] The reflected light signal after the third polychromatic light signal illuminates the object 8 to be imaged is received by the detection module 901 and converted into an electrical signal. The reconstructed image is obtained by the processing module 902 using a second-order correlation function based on the intensity of the electrical signal.
[0073] More specifically, the detection module 901 includes a first photodetector, a second photodetector, and a third photodetector; wherein,
[0074] The first photodetector is used to detect an optical signal with the same wavelength as the first optical signal.
[0075] The second photodetector is used to detect an optical signal with the same wavelength as the second optical signal.
[0076] The third photodetector is used to detect optical signals with the same wavelength as the third optical signal.
[0077] More specifically, the second-order correlation function is:
[0078]
[0079] in, To reconstruct the pixel values of the image, The wavelength reflected by the object to be imaged is The intensity of the light signal, In multiple measurements The average value, The wavelength that illuminates the object to be imaged is The intensity of the light signal, In multiple measurements The average value of (x,y) is the position coordinate of the object to be imaged, i=1,2,3.
[0080] Example 3
[0081] like Figure 3 As shown, a quantum imaging method based on wavelength multiplexing includes the following steps:
[0082] S1: The first polychromatic light signal is generated by light source 1;
[0083] The first polychromatic light signal includes a first light signal, a second light signal, and a third light signal with different wavelengths;
[0084] S2: The first polychromatic light signal is split into a first light signal and a second polychromatic light signal after passing through the first beam splitting module 2;
[0085] S3: The second polychromatic light signal is split into a second light signal and a third light signal after passing through the second beam splitting module 3;
[0086] S4: Modulate the first optical signal, the second optical signal, and the third optical signal respectively;
[0087] S5: Combine the modulated first optical signal, second optical signal and third optical signal to form a third polychromatic optical signal;
[0088] S6: Obtain the reconstructed image based on the reflected light signal after the third polychromatic light signal illuminates the object 8 to be imaged;
[0089] In actual implementation, if the reconstructed image meets the requirements, step S7 is executed; otherwise, step S1 is returned.
[0090] S7: Obtain the final reconstructed image.
[0091] More specifically, in step S6, the reconstructed image is obtained through the following second-order correlation function:
[0092]
[0093] in, To reconstruct the pixel values of the image, The wavelength reflected by the object to be imaged is The intensity of the light signal, In multiple measurements The average value, The wavelength that illuminates the object to be imaged is The intensity of the light signal, In multiple measurements The average value of (x,y) is the position coordinate of the object to be imaged, i=1,2,3.
[0094] Based on the disclosure and teachings of the foregoing specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the invention should also fall within the protection scope of the claims of the present invention. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on the present invention.
Claims
1. A quantum imaging system based on wavelength multiplexing, characterized in that, It includes a light source, a first beam splitting module, a second beam splitting module, a third beam splitting module, a first light modulation module, a second light modulation module, a third light modulation module, an object to be imaged, and an image generation module; wherein, The light source generates a first polychromatic light signal; the first polychromatic light signal includes a first light signal, a second light signal, and a third light signal with different wavelengths; The first polychromatic light signal is split into a first light signal and a second polychromatic light signal after passing through the first beam splitting module; the second polychromatic light signal is split into a second light signal and a third light signal after passing through the second beam splitting module. The first optical signal, the second optical signal, and the third optical signal are respectively input into the first optical modulation module, the second optical modulation module, and the third optical modulation module for modulation. The modulated first optical signal, the second optical signal, and the third optical signal are input into the third beam splitting module and combined to form the third polychromatic optical signal. The reflected light signal after the third polychromatic light signal illuminates the object to be imaged is received by the image generation module and the reconstructed image is obtained using a second-order correlation function.
2. The quantum imaging system based on wavelength multiplexing according to claim 1, characterized in that, It also includes a first reflector, a second reflector, and a third reflector; The first optical signal is input to the first optical modulation module after passing through the first reflector, and the third optical signal is input to the third optical modulation module after passing through the second and third reflectors in sequence.
3. The quantum imaging system based on wavelength multiplexing according to claim 1, characterized in that, The first, second, and third beam splitting modules all employ dichroic mirrors.
4. A quantum imaging system based on wavelength multiplexing according to claim 1, characterized in that, The first, second, and third optical modulation modules all use high-temperature polycrystalline silicon liquid crystal panels.
5. A quantum imaging system based on wavelength multiplexing according to claim 1, characterized in that, The first optical modulation module modulates the first optical signal using a first random binary pattern; the second optical modulation module modulates the second optical signal using a second random binary pattern; and the third optical modulation module modulates the third optical signal using a third random binary pattern.
6. A quantum imaging system based on wavelength multiplexing according to claim 1, characterized in that, The image generation module includes a detection module and a processing module; The reflected light signal after the third polychromatic light signal illuminates the object to be imaged is received by the detection module and converted into an electrical signal. The reconstructed image is obtained by the processing module using a second-order correlation function based on the intensity of the electrical signal.
7. A quantum imaging system based on wavelength multiplexing according to claim 6, characterized in that, The detection module includes a first photodetector, a second photodetector, and a third photodetector; wherein... The first photodetector is used to detect an optical signal with the same wavelength as the first optical signal. The second photodetector is used to detect an optical signal with the same wavelength as the second optical signal. The third photodetector is used to detect optical signals with the same wavelength as the third optical signal.
8. A quantum imaging system based on wavelength multiplexing according to claim 6, characterized in that, The second-order correlation function is: in, To reconstruct the pixel values of the image, The wavelength reflected by the object to be imaged is The intensity of the light signal, In multiple measurements The average value, The wavelength that illuminates the object to be imaged is The intensity of the light signal, In multiple measurements The average value of (x,y) is the position coordinate of the object to be imaged, i=1,2,3.
9. A quantum imaging method based on wavelength multiplexing, characterized in that, Includes the following steps: S1: The first polychromatic light signal is generated by the light source; The first polychromatic light signal includes a first light signal, a second light signal, and a third light signal with different wavelengths; S2: The first polychromatic light signal is split into a first light signal and a second polychromatic light signal after passing through the first beam splitting module; S3: The second polychromatic light signal is split into a second light signal and a third light signal after passing through the second beam splitting module; S4: Modulate the first optical signal, the second optical signal, and the third optical signal respectively; S5: Combine the modulated first optical signal, second optical signal and third optical signal to form a third polychromatic optical signal; S6: Obtain the reconstructed image based on the reflected light signal after the third polychromatic light signal illuminates the object to be imaged.
10. A quantum imaging method based on wavelength multiplexing according to claim 9, characterized in that, In step S6, the reconstructed image is obtained through the following second-order correlation function: in, To reconstruct the pixel values of the image, The wavelength reflected by the object to be imaged is The intensity of the light signal, In multiple measurements The average value, The wavelength that illuminates the object to be imaged is The intensity of the light signal, In multiple measurements The average value of (x,y) is the position coordinate of the object to be imaged, i=1,2,3.