Quantum Imaging System for Penetrating Scattering Media Based on Deconvolution Method

Abstract

This invention relates to a quantum imaging system based on deconvolution that penetrates scattering media, belonging to the field of optical imaging. The invention addresses the problem of image distortion caused by interference from scattering media in quantum imaging. The system comprises a beam emitter, a beam receiver, and a scattering medium. The beam emitted by the beam emitter travels through the scattering medium to the surface of the imaging target, then reflects off the target surface and penetrates the scattering medium again. The echo beam is received by the receiving optics and used for imaging. First, the beam emitter uses a spatial light modulator to generate a point source beam, and the beam receiver obtains the point spread function of the quantum imaging system penetrating the scattering medium. Then, the beam emitter uses the spatial light modulator to generate an orbital angular momentum beam, and the beam receiver obtains the distorted image of the quantum imaging system penetrating the scattering medium. The point spread function and the distorted image are input together into a deconvolution module for calculation, reconstructing the target image hidden behind the scattering medium.

Description

Technical Field

[0001] This invention relates to quantum imaging technology through scattering media, belonging to the field of optical imaging. Background Technology

[0002] Quantum imaging through scattering media is one of the fundamental problems in modern optics, with significant implications for both scientific and technological fields, particularly in imaging within biological tissues, imaging in turbid water, and imaging through the atmosphere. Under conditions of strong scattering, observations using traditional optical imaging systems often result in severely distorted images. For example, observing objects through frosted glass or turbid water produces only a blurry image; imaging through clouds involves significant beam scattering, leading to substantial information loss. In these scenarios of severe distortion, traditional imaging processing methods struggle to produce clear images of the target object. Summary of the Invention

[0003] To address the problem of image distortion caused by interference from scattering media in quantum imaging, this invention provides a quantum imaging system that penetrates scattering media based on the deconvolution method.

[0004] The quantum imaging system based on deconvolution method of the present invention includes a beam emitting unit, a beam receiving unit and a scattering medium 6; the beam emitted by the beam emitting unit reaches the surface of the imaging target 7 through the scattering medium 6, and then is reflected from the surface of the imaging target 7 through the scattering medium 6, and the echo beam is received by the receiving optics unit and imaged.

[0005] First, the beam emitting part uses the spatial light modulator 4 to modulate and generate a point source beam, and the beam receiving part obtains the point spread function of the quantum imaging system that penetrates the scattering medium.

[0006] Then, the beam emitting unit uses the spatial light modulator 4 to modulate and generate an orbital angular momentum beam, and the beam receiving unit obtains the distorted image of the quantum imaging system that penetrates the scattering medium.

[0007] The point spread function and the distorted image are input together into the deconvolution module for calculation, and the target image hidden behind the scattering medium is reconstructed.

[0008] Preferably, the deconvolution module is a Wiener deconvolution module, which is embedded in the beam receiving section.

[0009] Preferably, the point spread function and the distorted image are input together into the deconvolution module for calculation to reconstruct the target image hidden behind the scattering medium, and the calculation is performed according to the following formula:

[0010] Reconstruct the target image

[0011] In the formula:

[0012] F{·} denotes the Fourier transform.

[0013] F{·} * Indicates taking the conjugate.

[0014] F -1 {·} represents the inverse Fourier transform.

[0015] γ is a constant with a value of 0.0001.

[0016] Preferably, the beam emitting part includes a laser 1, a single-mode fiber 2, a collimator 3, a spatial light modulator 4, and a transmitting optical system 5, and the beam receiving part includes a receiving optical system 8, an array detector 9, and a computer 10;

[0017] Laser 1 generates a laser signal, which is passed through single-mode fiber 2 to obtain a single transverse mode Gaussian mode, and then collimated by collimator 3 and output to spatial light modulator 4.

[0018] The spatial light modulator 4 first loads the designed point source phase to generate a point source beam, which is then emitted through the transmitting optical system 5. The point source beam penetrates the scattering medium 6 to reach the surface of the imaging target 7, and then reflects off the surface of the imaging target 7 to penetrate the scattering medium 6. The echo beam is received by the receiving optical system 8, and the array detector 9 collects the received beam and inputs the image into the computer 10. The image obtained at this time is the point spread function (PSF) of the quantum imaging system that penetrates the scattering medium.

[0019] Then, the spatial light modulator 4 loads the designed fork grating to generate an orbital angular momentum beam. The orbital angular momentum beam is emitted through the transmitting optical system 5. The orbital angular momentum beam penetrates the scattering medium 6 to reach the surface of the imaging target 7, and then reflects from the surface of the imaging target 7 to penetrate the scattering medium 6. The echo beam is received by the receiving optical system 8. The array detector 9 collects the received beam and inputs the image into the computer 10. The image obtained at this time is the distorted image I of the quantum imaging system that penetrates the scattering medium.

[0020] Finally, after computer signal processing, the point spread function (PSF) and the distorted image I are input together into the Wiener deconvolution module for calculation, and the target image O hidden behind the scattering medium is reconstructed.

[0021] The beneficial effects of this invention are as follows: This invention innovatively utilizes the ability of a spatial light modulator to modulate arbitrary beam structures, obtains the point spread function of a quantum imaging system that penetrates and scatters media, and achieves the reconstruction and restoration of distorted images through the Wiener deconvolution method, thus solving the problem of image distortion caused by interference from scattering media in quantum imaging. Attached Figure Description

[0022] Figure 1This is a schematic diagram of the structure of the quantum imaging system for penetrating scattering media based on the deconvolution method described in this invention;

[0023] Figure 2 This is a schematic diagram of the principle of quantum imaging of penetrating scattering media based on the deconvolution method described in this invention. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0026] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the scope of the invention.

[0027] Specific Implementation Method 1: The following is combined with... Figure 1 and Figure 2 This embodiment describes a quantum imaging system based on deconvolution using a scattering medium, which includes a beam emitter, a beam receiver, and a scattering medium 6. The beam emitted by the beam emitter reaches the surface of the imaging target 7 via the scattering medium 6, and is then reflected from the surface of the imaging target 7 through the scattering medium 6. The echo beam is received by the receiving optics and used for imaging.

[0028] First, the beam emitting part uses the spatial light modulator 4 to modulate and generate a point source beam, and the beam receiving part obtains the point spread function of the quantum imaging system that penetrates the scattering medium.

[0029] Then, the beam emitting unit uses the spatial light modulator 4 to modulate and generate an orbital angular momentum beam, and the beam receiving unit obtains the distorted image of the quantum imaging system that penetrates the scattering medium.

[0030] The point spread function and the distorted image are input together into the deconvolution module for calculation, and the target image hidden behind the scattering medium is reconstructed.

[0031] The system in this embodiment utilizes the ability of a spatial light modulator to modulate arbitrary beam structures. The spatial light modulator 4 uses a pre-designed point source phase and fork grating to obtain a point source beam and an orbital angular momentum beam, respectively. The point spread function and distortion image penetrating the scattering medium are obtained through an array detector.

[0032] See Figure 1 and Figure 2The beam emitting unit includes a laser 1, a single-mode fiber 2, a collimator 3, a spatial light modulator 4, and a transmitting optical system 5; the beam receiving unit includes a receiving optical system 8, an array detector 9, and a computer 10; based on this system, the imaging process in this embodiment is as follows:

[0033] Laser 1 generates a laser signal, which is then passed through single-mode fiber 2 to obtain a good single transverse mode Gaussian mode. The beam is then collimated by collimator 3 to ensure the modulation efficiency of the designed optical field. After collimation, the beam is output to spatial light modulator 4.

[0034] The spatial light modulator 4 first loads the designed point source phase to generate a point source beam, which is then emitted through the transmitting optical system 5. The point source beam penetrates the scattering medium 6 to reach the surface of the imaging target 7, and then reflects off the surface of the imaging target 7 to penetrate the scattering medium 6. The echo beam is received by the receiving optical system 8, and the array detector 9 collects the received beam and inputs the image into the computer 10. The image obtained at this time is the point spread function (PSF) of the quantum imaging system that penetrates the scattering medium.

[0035] Then, the spatial light modulator 4 loads the designed fork grating to generate an orbital angular momentum beam. The orbital angular momentum beam is emitted through the transmitting optical system 5. The orbital angular momentum beam penetrates the scattering medium 6 to reach the surface of the imaging target 7, and then reflects from the surface of the imaging target 7 to penetrate the scattering medium 6. The echo beam is received by the receiving optical system 8. The array detector 9 collects the received beam and inputs the image into the computer 10. The image obtained at this time is the distorted image I of the quantum imaging system that penetrates the scattering medium.

[0036] Finally, after computer signal processing, the point spread function (PSF) and the distorted image I are input together into the Wiener deconvolution module for calculation, and the target image O hidden behind the scattering medium is reconstructed.

[0037] The solution process requires performing a two-dimensional Fourier transform on the point spread function (PSF) and the distorted image I. The expression for Wiener deconvolution is:

[0038]

[0039] In the formula:

[0040] F{·} denotes the Fourier transform.

[0041] F{·} * Indicates taking the conjugate.

[0042] F -1 {·} represents the inverse Fourier transform.

[0043] γ is a constant to avoid the denominator being zero, and its value is 0.0001.

[0044] After the above calculation process, the inverse Fourier transform result is the reconstructed image O.

[0045] While the invention has been described herein with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the invention. Therefore, it should be understood that many modifications can be made to the exemplary embodiments, and other arrangements can be designed without departing from the spirit and scope of the invention as defined by the appended claims. It should be understood that different dependent claims and features described herein can be combined in ways different from those described in the original claims. It is also understood that features described in conjunction with individual embodiments can be used in other described embodiments.

Claims

1. A quantum imaging system for penetrating and scattering media based on the deconvolution method, characterized in that, It includes a beam emitting part, a beam receiving part and a scattering medium (6); the beam emitted by the beam emitting part reaches the surface of the imaging target (7) through the scattering medium (6), and then reflects from the surface of the imaging target (7) through the scattering medium (6), and the echo beam is received by the receiving optics and imaged; First, the beam emitting part uses a spatial light modulator (4) to modulate and generate a point source beam, and the beam receiving part obtains the point spread function of the quantum imaging system that penetrates the scattering medium. Then, the beam emitting section modulates and generates an orbital angular momentum beam using a spatial light modulator (4), and the beam receiving section obtains a distorted image of the quantum imaging system that penetrates the scattering medium. The point spread function and the distorted image are input together into the deconvolution module for calculation, and the target image hidden behind the scattering medium is reconstructed.

2. The quantum imaging system for penetrating scattering media based on the deconvolution method according to claim 1, characterized in that, The deconvolution module uses a Wiener deconvolution module, which is embedded in the beam receiver.

3. The quantum imaging system for penetrating scattering media based on the deconvolution method according to claim 2, characterized in that, The point spread function and the distorted image are input together into the deconvolution module for calculation, reconstructing the target image hidden behind the scattering medium, and the calculation is performed according to the following formula: Reconstruct the target image In the formula: F{·} denotes the Fourier transform. F{·} * Indicates taking the conjugate. F -1 {·} represents the inverse Fourier transform. γ is a constant with a value of 0.0001.

4. The quantum imaging system for penetrating scattering media based on the deconvolution method according to claim 3, characterized in that, The beam emitting unit includes a laser (1), a single-mode fiber (2), a collimator (3), a spatial light modulator (4), and a transmitting optical system (5); the beam receiving unit includes a receiving optical system (8), an array detector (9), and a computer (10). The laser (1) generates a laser signal, which is passed through a single-mode fiber (2) to obtain a single transverse mode Gaussian mode, and then the beam is collimated and output to the spatial light modulator (4) through the collimator (3). The spatial light modulator (4) first loads the designed point source phase to generate a point source beam, which is then emitted through the emission optical system (5). The point source beam penetrates the scattering medium (6) to reach the surface of the imaging target (7), and then reflects off the surface of the imaging target (7) to penetrate the scattering medium (6). The echo beam is received by the receiving optical system (8), and the array detector (9) collects the received beam and inputs the image into the computer (10). The image obtained at this time is the point spread function (PSF) of the quantum imaging system that penetrates the scattering medium. Then, the spatial light modulator (4) loads the designed fork grating to generate an orbital angular momentum beam. The orbital angular momentum beam is emitted through the emission optical system (5). The orbital angular momentum beam penetrates the scattering medium (6) and reaches the surface of the imaging target (7). It is then reflected from the surface of the imaging target (7) and penetrates the scattering medium (6). The echo beam is received by the receiving optical system (8). The array detector (9) collects the received beam and inputs the image into the computer (10). The image obtained at this time is the distorted image I of the quantum imaging system that penetrates the scattering medium. Finally, after computer signal processing, the point spread function (PSF) and the distorted image I are input together into the Wiener deconvolution module for calculation, and the target image O hidden behind the scattering medium is reconstructed.

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