Correlation imaging detection device and system

Abstract

The present application relates to a correlation imaging detection device and system. The correlation imaging detection device forms a first real image on one side of the light emitted by the first lens module by setting a first lens module. By setting a second lens module, the first real image can be further imaged, that is, a second real image is formed on the side of the second lens module away from the first real image, and the second real image is conjugate with the first real image, and a spatial light modulation module is set at the location of the second real image. Therefore, the setting of the second lens module can extend the distance between the first lens module and the spatial light modulation module, thereby avoiding the first lens module blocking the light incident on the receiving module after being modulated by the spatial light modulation module when the first lens module is used alone, which can improve the integrity of the electrical signal carrying target information obtained by the correlation imaging detection device and improve the quality of the optical signal.

Description

Technical Field

[0001] The present application relates to the technical field of correlation imaging, and in particular to a correlation imaging detection device and system. Background Art

[0002] Ghost imaging is a new imaging technology that restores the image of an object through correlation algorithms or compressed sensing. Compared with traditional imaging methods, ghost imaging has advantages such as high sensitivity and low cost, and can be applied to remote sensing, lidar, video surveillance and other fields.

[0003] In traditional correlation imaging systems, a single lens is often used as a receiving lens, which causes the modulated light field to be blocked by the single lens or its holder, affecting the imaging quality. Summary of the invention

[0004] Based on this, it is necessary to provide a correlation imaging detection device and system to address the problem that a single lens is used as a receiving lens, resulting in the modulated light field being blocked by the single lens or its clamping parts.

[0005] The present application provides a correlation imaging detection device, comprising:

[0006] A first lens module, used for receiving an incident light field carrying target information, wherein the incident light field forms a first real image of the target after passing through the first lens module;

[0007] A second lens module is disposed on the optical path of the light emitted from the first lens module, and is used to receive the first real image, the first real image is formed into a second real image of the target through the second lens module, and the second real image is conjugate with the first real image;

[0008] a spatial light modulation module, arranged on the optical path of the light emitted from the second lens module and located at the plane where the second real image is located, for receiving the second real image and spatially modulating the second real image to form a modulated light field carrying the second real image information; and

[0009] The receiving module is arranged on the optical path of the outgoing light of the spatial light modulation module, and is used for receiving the modulated light field and converting the modulated light field into an electrical signal.

[0010] In one embodiment, the receiving module includes:

[0011] A third lens module, disposed on the optical path of the light emitted from the spatial light modulation module, for converging the modulated light field; and

[0012] The detector is arranged on the optical path of the outgoing light of the third lens module, and is used to receive the converged modulated light field and convert the modulated light field into an electrical signal.

[0013] In one of the embodiments, the detector is one of a single pixel detector, a charge-coupled device (CCD), a complementary metal oxide semiconductor (CMOS) and a multi-pixel photon counter (MPPC).

[0014] In one embodiment, the third lens module includes a converging lens, which is disposed on the optical path of the light emitted from the spatial light modulation module and is used to converge the modulated light field.

[0015] In one embodiment, the spatial light modulation module includes a digital micro-mirror array (DMD), which is arranged on the optical path of the light emitted from the second lens module and located in the plane where the second real image is located, and is used to receive the second real image and modulate the second real image to form the modulated light field carrying the second real image information; or

[0016] The spatial light modulation module includes an absorption modulator, which is arranged on the optical path of the light emitted from the second lens module and is located in the plane where the second real image is located. It is used to receive the second real image and modulate the second real image to form the modulated light field carrying the second real image information, wherein the absorption modulator includes a superconducting material module.

[0017] In one embodiment, the first lens module includes a first single lens, which is used to receive an incident light field carrying target information, and the incident light field forms the first real image of the target after passing through the first single lens; or

[0018] The first lens module includes a first cemented lens, which is used to receive an incident light field carrying target information, and the incident light field forms the first real image of the target after passing through the first cemented lens; or

[0019] The first lens module includes a first lens group, which includes a plurality of lenses. The plurality of lenses are sequentially arranged on an optical path of the incident light field according to a preset order, and are used to receive the incident light field carrying target information. The incident light field forms the first real image of the target after passing through the first lens group.

[0020] In one embodiment, the second lens module comprises a second single lens, which is disposed on the optical path of light emitted from the first lens module and is used to receive the incident light field, and the incident light field forms the second real image of the target through the second single lens; or

[0021] The second lens module comprises a second cemented lens, which is disposed on the optical path of light emitted from the first lens module and is used to receive the incident light field, and the incident light field forms the second real image of the target through the second cemented lens; or

[0022] The second lens module includes a second lens group, which includes a plurality of lenses. The plurality of lenses are sequentially arranged on the optical path of light emitted from the first lens module in a preset order. The second lens group is used to receive the incident light field, and the incident light field forms the second real image of the target through the second lens group.

[0023] In one embodiment, the single lens is a convex lens, and the image distance of the convex lens is greater than the back focal length of the first lens module.

[0024] In one embodiment, the second single lens, the second cemented lens and / or the second lens group are made of metamaterial.

[0025] Based on the same inventive concept, the present application also provides a correlation imaging detection device, comprising:

[0026] At least three fourth lens modules, used for receiving an incident light field carrying target information, wherein the incident light field forms a real image of the target after passing through each of the fourth lens modules, and the real images formed by two adjacent fourth lens modules are conjugate;

[0027] a spatial light modulation module, arranged on the optical path of the light emitted from the last of the fourth lens modules and located at the plane where the last of the real images is located, for receiving the last of the real images and spatially modulating the last of the real images to form a modulated light field carrying the real image information; and

[0028] The receiving module is arranged on the optical path of the outgoing light of the spatial light modulation module, and is used for receiving the modulated light field and converting the modulated light field into an electrical signal.

[0029] Based on the same inventive concept, the present application also provides a correlation imaging detection system, comprising the correlation imaging detection device and computing device described in any one of the above embodiments, wherein the correlation imaging detection device transmits the electrical signal carrying target information to the computing device, and the computing device calculates the image of the target based on the electrical signal.

[0030] The associated imaging detection device provided in the above embodiment forms a first real image through the first lens module, and forms a second real image on the side of the second lens module away from the first real image through the second lens module. The second real image is conjugate with the first real image, and the spatial light modulation module is arranged at the position of the second real image. Therefore, the second lens module does not change the properties of the first real image. The arrangement of the second lens module can extend the distance between the first lens module and the spatial light modulation module, thereby avoiding the first lens module blocking the light incident on the receiving module after being modulated by the spatial light modulation module when the first lens module is used alone, and can improve the integrity of the electrical signal carrying target information obtained by the associated imaging detection device. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A schematic diagram of the connection structure of the first correlation imaging detection device provided in an embodiment of the present application;

[0032] Figure 2 A schematic diagram of the connection structure of a second correlation imaging detection device provided in an embodiment of the present application;

[0033] Figure 3 A schematic diagram of the optical path structure of a correlation imaging detection device provided in an embodiment of the present application;

[0034] Figure 4 A schematic diagram of the connection structure of a third correlation imaging detection device provided in an embodiment of the present application;

[0035] Figure 5 A schematic diagram of the connection structure of the fourth correlation imaging detection device provided in the embodiment of the present application;

[0036] Figure 6 A schematic diagram of the connection structure of a fifth correlation imaging detection device provided in an embodiment of the present application;

[0037] Figure 7 A schematic diagram of the connection structure of the sixth correlation imaging detection device provided in an embodiment of the present application;

[0038] Figure 8 A schematic diagram of the connection structure of a seventh correlation imaging detection device provided in an embodiment of the present application;

[0039] Fig. 9 A schematic diagram of the connection structure of a correlation imaging detection system provided in an embodiment of the present application.

[0040] 100 Correlation Imaging Detection Device

[0041] 10. First lens module

[0042] 110 The first single lens

[0043] 120 First Doublet

[0044] 130 First Lens Group

[0045] 20 Second lens module

[0046] 210 Second single lens

[0047] 220 Second doublet lens

[0048] 230 Second Lens Group

[0049] 30 Spatial Modulation Module

[0050] 310 Digital Micromirror Array

[0051] 320 Absorption Modulator

[0052] 40 Receiver Module

[0053] 410 Third lens module

[0054] 420 Detector

[0055] 50 fourth lens module

[0056] 200 Computing Devices DETAILED DESCRIPTION

[0057] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific implementation disclosed below.

[0058] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0059] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0060] See also Figure 1The present application provides a correlation imaging detection device 100. The correlation imaging detection device 100 includes a first lens module 10, a second lens module 20, a spatial light modulation module 30 and a receiving module 40. The first lens module 10 is used to receive an incident light field carrying target information, and the incident light field forms a first real image of the target after passing through the first lens module 10. The second lens module 20 is arranged on the optical path of the light emitted from the first lens module 10, and is used to receive the first real image. The first real image forms a second real image of the target through the second lens module 20, and the second real image is conjugate with the first real image. The spatial light modulation module 30 is arranged on the optical path of the light emitted from the second lens module 20, and is located on the plane where the second real image is located, and is used to receive the second real image and spatially modulate the second real image to form a modulated light field carrying the second real image information. The receiving module 40 is arranged on the optical path of the light emitted from the spatial light modulation module 30, and is used to receive the modulated light field and convert the modulated light field into an electrical signal.

[0061] It can be understood that the correlation imaging detection device 100 provided in the present application can be applied to an active lighting correlation imaging system. In an active lighting correlation imaging system, a light source module can be used to illuminate the target, and the light is reflected by the target after being incident on the target surface, forming an incident light field of the first lens module 10, wherein the incident light field carries target information that can be used for target imaging. In one embodiment, the light source module may include a laser, and using a laser as an active lighting light source can improve the signal-to-noise ratio of the incident light field of the first lens module 10, thereby improving the quality of the electrical signal obtained by the correlation imaging detection device 100 and improving the effect of correlation imaging. In one embodiment, the correlation imaging detection device 100 provided in the present application can also be applied to a passive lighting correlation imaging system. In a passive lighting correlation imaging system, there is no need to set a light source module. Natural light is irradiated to the target, and the incident light field of the first lens module 10 is formed after being reflected by the target surface. Similarly, the incident light field of the first lens module 10 in the passive lighting correlation imaging system also carries target information that can be used for target imaging.

[0062] It can be understood that the first lens module 10 can receive the incident light field carrying the target information, and form a first real image on the side of the outgoing light of the first lens module 10. The light field forming the first real image continues to propagate along its original transmission direction, and can be incident on the second lens module 20, and form a second real image on the side of the second lens module 20 away from the first real image. In this embodiment, the second real image is conjugate with the first real image, that is, the second real image has the same properties as the first real image. Therefore, the setting of the second lens module 20 can extend the distance between the first lens module 10 and the spatial light modulation module 30 without changing the imaging properties, thereby avoiding the first lens module 10 blocking the light incident on the receiving module 40 after being modulated by the spatial light modulation module 30 when the first lens module 10 is used alone, thereby improving the quality of the electrical signal obtained by the associated imaging detection device 100.

[0063] The spatial light modulation module 30 can modulate a certain parameter of the light field through the spatial light modulation unit under active control. In one embodiment, the spatial light modulation module 30 can modulate the amplitude of the light field, so as to write the preset information into the light wave to achieve the purpose of light wave modulation. The spatial light modulation module 30 can be arranged on the optical path of the light emitted from the second lens module 20, and is located in the plane where the second real image is located. Therefore, the spatial light modulation module 30 can be used to receive the second real image, and perform spatial modulation on the second real image to form a modulated light field carrying the second real image information. It can be understood that the present application does not specifically limit the spatial light modulation device in the spatial light modulation module 30, as long as it can be combined with the receiving module 40 to realize the acquisition of the associated imaging electrical signal. Specifically, the spatial light modulation module 30 can be a digital micromirror device, an acousto-optic deflector, or a metamaterial (which can be a light manipulation metamaterial), etc. In one embodiment, the spatial light modulation module 30 can include a reflective spatial light modulator (Spatial Light Modulator, SLM), and the receiving module 40 can be arranged on the outgoing light path of the reflective spatial light modulator.

[0064] The receiving module 40 can be used to receive a modulated light field, wherein the modulated light field includes the required information that can be used to perform associated imaging calculations. The receiving module 40 can convert the optical signal carrying the target information into an electrical signal, so that the computing device 200 electrically connected to the receiving module 40 can perform associated imaging calculations based on the received electrical signal in combination with the modulated signal emitted by the control system, thereby obtaining an image of the target.

[0065] The associated imaging detection device 100 provided in the above embodiment can form a first real image on one side of the outgoing light through the first lens module 10. The first real image is further imaged by the second lens module 20, that is, a second real image is formed on the side of the second lens module 20 away from the first real image, and the second real image is conjugate with the first real image, and the spatial light modulation module 30 is arranged at the position of the second real image. Therefore, the second lens module 20 does not change the properties of the first real image, and the setting of the second lens module 20 can extend the distance between the first lens module 10 and the spatial light modulation module 30, thereby avoiding the first lens module 10 blocking the light modulated by the spatial light modulation module 30 and incident on the receiving module 40 when the first lens module 10 is used alone, which can improve the integrity of the electrical signal carrying target information obtained by the associated imaging detection device 100.

[0066] Please also see Figure 2-Figure 3 In one embodiment, the receiving module 40 includes a third lens module 410 and a detector 420. The third lens module 410 is arranged on the optical path of the light emitted from the spatial light modulation module 30, and is used to converge the modulated light field. The detector 420 is arranged on the optical path of the light emitted from the third lens module 410, and is used to receive the converged modulated light field and convert the modulated light field into an electrical signal. It can be understood that the light reflected by the spatial light modulation module 30 has a certain divergence. In order to ensure that the detector 420 can obtain all the light signals carrying the target information, the third lens module 410 can be arranged to converge and shape the modulated light field. Among them, the specific position of the third lens module 410, the number of lenses included and the parameters can all be selected according to the position setting and model of the spatial light modulation module 30 and the detector 420, and the present application does not make specific restrictions on this. In one embodiment, the third lens module 410 may include a converging lens, which is arranged on the optical path of the light emitted from the spatial light modulation module 30, and is used to converge the modulated light field. In another embodiment, the third lens module 410 may also include a lens assembly, a single lens with a single aperture, a lens group, a plurality of cylindrical mirrors, or a plurality of spherical mirrors, as long as it can converge and shape the modulated light field.

[0067] In one embodiment, the detector 420 may be a single-pixel detector. The single-pixel detector is suitable for indirect imaging methods that do not require array detectors. It can be combined with the spatial light modulation module 30 to replace the detector array in the traditional imaging scheme to obtain light field intensity correlation information carrying target information. It can be understood that after the spatial light modulation module 30 modulates the light field, a modulated light field is formed. The modulated light field passes through the third lens module 410 and can be completely received by the single-pixel detector and converted into an electrical signal. The single-pixel detector is connected to the computing device 200, and the computing device 200 can calculate the electrical signal carrying the target information with the modulated signal emitted by the control system (correlation operation or compressed sensing algorithm, etc.), thereby obtaining an image of the target. It can be understood that compared with the traditional geometric imaging method, the use of a single-pixel camera for correlation imaging has the advantages of high sensitivity and low cost, and can be applied to remote sensing, reconnaissance, geological exploration and other fields. In another embodiment, the detector 420 can also be one of a charge-coupled device (CCD), a complementary metal oxide semiconductor (CMOS) and a multi-pixel photon counter (MPPC), as long as it can meet the detection requirements of the correlation imaging detection device 100, that is, combined with the spatial light modulation module 30, it can obtain the light field intensity correlation information carrying the target information. It should be noted that the present application does not limit the specific type of the detector 420, as long as it can receive the modulated light field after convergence and convert the modulated light field into an electrical signal, it is within the protection scope of the present application.

[0068] Please also see Figure 4In one embodiment, the spatial light modulation module 30 includes a digital micromirror array 310, which is arranged on the optical path of the light emitted from the second lens module 20 and is located in the plane where the second real image is located, and is used to receive the second real image and modulate the second real image to form a modulated light field carrying the second real image information. The digital micromirror array 310 is a light modulation device composed of a plurality of micron-sized aluminum mirror arrays. Each micromirror has only two states - on and off (i.e., rotated +12° and -12° around its diagonal), and can perform specific amplitude modulation on the light. In this embodiment, the light carrying the target information first passes through the first lens module 10 to form a first real image, and the first real image is imaged onto the digital micromirror array 310 through the second lens module 20 to form a second real image, and the second real image is amplitude modulated by the digital micromirror array 310. In one embodiment, the preset micromirror on the digital micromirror array 310 can be flipped by +12° each time a measurement is made, so that the modulated light is rotated by 24° and then reflected to the converging lens for focusing, and detected by a single pixel detector. It can be understood that the digital micromirror array 310 has the advantages of full digitization and high image quality, and can realize accurate amplitude modulation of the second real image, thereby ensuring the imaging quality of the associated imaging.

[0069] In another embodiment, the spatial light modulation module 30 includes an absorption modulator 320, which is arranged on the optical path of the light emitted from the second lens module 20 and is located in the plane where the second real image is located, and is used to receive the second real image and modulate the second real image to form a modulated light field carrying the second real image information, wherein the absorption modulator 320 includes a superconducting material module. In one embodiment, the spatial light modulation module 30 can also include any one of the spatial light modulators such as a low-temperature LCOS spatial light modulator, a reflective spatial light modulator, and a transmissive spatial light modulator, and the optical path structure can be adaptively adjusted according to the type of spatial light modulator. It should be noted that the present application does not specifically limit the type of spatial light modulator included in the spatial light modulation module 30. As long as it can realize spatial modulation of the second real image and form a modulated light field carrying the second real image information, it is within the protection scope of the present application.

[0070] Please also see Figure 2-Figure 5In one embodiment, the first lens module 10 includes a first single lens 110, which is used to receive an incident light field carrying target information, and the incident light field forms a first real image of the target after passing through the first single lens 110. Alternatively, the first lens module 10 includes a first cemented lens 120, which is used to receive an incident light field carrying target information, and the incident light field forms a first real image of the target after passing through the first cemented lens 120. Alternatively, the first lens module 10 includes a first lens group 130, which includes a plurality of lenses, which are sequentially arranged on an optical path of the incident light field according to a preset order, and are used to receive an incident light field carrying target information, and the incident light field forms a first real image of the target after passing through the first lens group 130.

[0071] In one embodiment, the second lens module 20 includes a second single lens 210, which is disposed on the optical path of the light emitted from the first lens module 10 and is used to receive the incident light field, and the incident light field forms a second real image of the target through the second single lens 210. In this embodiment, the first lens module 10 may include a first lens group 130. In one embodiment, the second single lens 210 is a convex lens, and the image distance of the convex lens is greater than the back focal length of the first lens module 10.

[0072] Please also see Figure 6-Figure 7 In one embodiment, the second lens module 20 includes a second cemented lens 220, which is disposed on the optical path of the light emitted from the first lens module 10 and is used to receive the incident light field, and the incident light field forms a second real image of the target through the second cemented lens 220. Alternatively, the second lens module 20 includes a second lens group 230, which includes a plurality of lenses, which are sequentially disposed on the optical path of the light emitted from the first lens module 10 in a preset order, and the second lens group 230 is used to receive the incident light field, and the incident light field forms a second real image of the target through the second lens group 230. It can be understood that in the second lens module 20, the second cemented lens 220 or the second lens group 230 can be used to replace the second single lens 210. In one embodiment, the second single lens 210, the second cemented lens 220 and / or the second lens group 230 are made of metamaterials, and the first single lens 110, the first cemented lens 120, and the first lens group 130 can also be made of metamaterials. It should be noted that the first single lens 110, the first cemented lens 120, the first lens group 130 in the first lens module 10 and the second single lens 210, the second cemented lens 220, the second lens group 230 in the second lens module 20 can be combined in any way, and the drawings of the present application do not limit this.

[0073] It can be understood that if only a single lens is used as a receiving lens, there will be aberrations during imaging, resulting in blurred imaging, while the aberrations can be reduced when the lens group is used as a receiving lens. However, due to the short back focus of the lens group, after the spatial light modulation module 30 modulates the image of the target, the modulated light field formed is easily blocked by the lens group or the clamping member of the lens group during the transmission process, affecting the detection of the single pixel detector signal, thereby affecting the effect of the associated imaging. By using the combination of the first lens module 10 and the second lens module 20 in the receiving light path instead of a single single lens, wherein the first lens module 10 and / or the second lens module 20 may include one or more coaxial single lenses or lens groups. In one embodiment, a second single lens 210 may be set on the optical path of the light emitted by the first single lens 110. By combining the first single lens 110 and the second single lens 210, the modulated light field reflected after the spatial light modulation module 30 modulates the imaging of the target can be prevented from being blocked by the lens group, and the effect of the associated imaging can be improved.

[0074] In one embodiment, the light carrying the target information first passes through the first single lens 110 (or the first cemented lens 120, the first lens group 130) to form a first real image, and then the first real image passes through the second single lens 210 (or the second cemented lens 220, the second lens group 230), and then forms a second real image at the conjugate surface of the first real image relative to the second single lens 210. The spatial light modulation module 30 can be set at the position of the second real image and perform spatial modulation on the second real image. It can be understood that by selecting a second single lens 210 with a suitable focal length, the distance between the second single lens 210 and the spatial light modulation module 30 can be controlled, so that the reflected light after the spatial light modulation module 30 can be prevented from being blocked by the second single lens 210 or the lens group in the first single lens 110, and the effect of associated imaging can be improved.

[0075] Please also see Figure 8Based on the same inventive concept, the present application also provides a correlation imaging detection device 100. The correlation imaging detection device 100 includes at least three fourth lens modules 50, a spatial light modulation module 30 and a receiving module 40. At least three fourth lens modules 50 are used to receive an incident light field carrying target information. The incident light field forms a real image of the target after passing through each fourth lens module 50, and the real images formed by two adjacent fourth lens modules 50 are conjugate. The spatial light modulation module 30 is arranged on the optical path of the light emitted from the last fourth lens module 50 and is located on the plane where the last real image is located, and is used to receive the last real image and perform spatial modulation on the last real image to form a modulated light field carrying real image information. The receiving module 40 is arranged on the optical path of the light emitted from the spatial light modulation module 30, and is used to receive the modulated light field and convert the modulated light field into an electrical signal. In this embodiment, the present application does not specifically limit the number of the fourth lens modules 50, and can be set according to the needs of the correlation imaging detection device 100.

[0076] Please also see Fig. 9 Based on the same inventive concept, the present application also provides a correlation imaging detection system, including any of the correlation imaging detection devices 100 and a computing device 200 in the above embodiments, the correlation imaging detection device 100 transmits an electrical signal carrying target information to the computing device 200, and the computing device 200 calculates the image of the target according to the electrical signal. It can be understood that the correlation imaging detection device 100 can be any of the correlation imaging detection devices 100 in the above embodiments, which will not be repeated here. In one embodiment, the computing device 200 can include a control module and a signal processing module, and the control module and the signal processing module are electrically connected. Among them, the control module can be used as a control system of the correlation imaging detection system, and can generate a modulation signal and send it to the spatial light modulation module 30. The signal processing module can receive the electrical signal carrying target information output by the correlation imaging detection device 100, and perform correlation calculation in combination with the modulation signal to obtain the image of the target. In one embodiment, the computing device 200 can be a micro control unit or a computer, etc., which can apply various types of correlation imaging algorithms or compressed sensing algorithms in the prior art to process the electrical signal output by the correlation imaging detection device 100, so as to obtain the image of the target. It can be understood that the process of implementing the operation of the modulation signal and the electrical signal using the correlation imaging algorithm or the compressed sensing algorithm can refer to the methods in the existing literature, and will not be described in detail here.

[0077] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0078] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A correlation imaging detection device, characterized in that: include: A first lens module (10) is used to receive an incident light field carrying target information, wherein the incident light field forms a first real image of the target after passing through the first lens module (10); A second lens module (20) is arranged on the optical path of light emitted from the first lens module (10), and is used to receive the first real image, the first real image forms a second real image of the target through the second lens module (20), and the second real image is conjugate with the first real image; A spatial light modulation module (30) is arranged on the optical path of light emitted from the second lens module (20) and is located on the plane where the second real image is located, and is used to receive the second real image and perform spatial modulation on the second real image to form a modulated light field carrying information of the second real image; as well as The receiving module (40) is arranged on the optical path of the outgoing light of the spatial light modulation module (30) and is used for receiving the modulated light field and converting the modulated light field into an electrical signal.

2. The correlation imaging detection device according to claim 1, characterized in that: The receiving module (40) comprises: A third lens module (410) is arranged on the optical path of the light emitted from the spatial light modulation module (30) and is used to converge the modulated light field; and The detector (420) is arranged on the optical path of the outgoing light of the third lens module (410), and is used to receive the converged modulated light field and convert the modulated light field into an electrical signal.

3. The correlation imaging detection device according to claim 2, characterized in that: The detector (420) is one of a single pixel detector, a charge coupled device, a complementary metal oxide semiconductor and a multi-pixel photon counter.

4. The correlation imaging detection device according to claim 2, characterized in that: The third lens module (410) comprises a converging lens, which is arranged on the optical path of light emitted from the spatial light modulation module (30) and is used to converge the modulated light field.

5. The correlation imaging detection device according to claim 1, characterized in that: The spatial light modulation module (30) comprises a digital micromirror array (310), which is arranged on the optical path of light emitted from the second lens module (20) and located on the plane where the second real image is located, and is used to receive the second real image and modulate the second real image to form the modulated light field carrying the second real image information; or The spatial light modulation module (30) comprises an absorption modulator (320), which is arranged on the optical path of the light emitted from the second lens module (20) and is located on the plane where the second real image is located, and is used to receive the second real image and modulate the second real image to form the modulated light field carrying the second real image information, wherein the absorption modulator (320) comprises a superconducting material module.

6. The correlation imaging detection device according to claim 1, characterized in that: The first lens module (10) comprises a first single lens (110) for receiving an incident light field carrying target information, wherein the incident light field forms the first real image of the target after passing through the first single lens (110); or The first lens module (10) comprises a first cemented lens (120) for receiving an incident light field carrying target information, wherein the incident light field forms the first real image of the target after passing through the first cemented lens (120); or The first lens module (10) comprises a first lens group (130), the first lens group (130) comprising a plurality of lenses, the plurality of lenses being arranged in sequence on an optical path for transmitting the incident light field in a preset order, and being used for receiving the incident light field carrying target information, the incident light field forming the first real image of the target after passing through the first lens group (130).

7. The correlation imaging detection device according to claim 1, characterized in that: The second lens module (20) comprises a second single lens (210), the second single lens (210) being arranged on the optical path of light emitted from the first lens module (10) and being used to receive the incident light field, the incident light field forming the second real image of the target through the second single lens (210); or The second lens module (20) comprises a second cemented lens (220), the second cemented lens (220) being arranged on the optical path of light emitted from the first lens module (10) and being used to receive the incident light field, the incident light field forming the second real image of the target through the second cemented lens (220); or The second lens module (20) comprises a second lens group (230), the second lens group (230) comprises a plurality of lenses, the plurality of lenses are sequentially arranged in a preset order on the optical path of light emitted from the first lens module (10), the second lens group (230) is used to receive the incident light field, and the incident light field forms the second real image of the target through the second lens group (230).

8. The correlation imaging detection device according to claim 7, characterized in that: The second single lens (210) is a convex lens, and the image distance of the convex lens is greater than the back focal length of the first lens module (10).

9. The correlation imaging detection device according to claim 7, characterized in that: The second single lens (210), the second cemented lens (220) and / or the second lens group (230) are made of metamaterial.

10. A correlation imaging detection device, characterized in that: include: At least three fourth lens modules (50) are used to receive an incident light field carrying target information, wherein the incident light field forms a real image of the target after passing through each of the fourth lens modules (50), and the real images formed by two adjacent fourth lens modules (50) are conjugate; A spatial light modulation module (30) is arranged on the optical path of the light emitted from the last fourth lens module (50) and is located at the plane where the last real image is located, and is used to receive the last real image and perform spatial modulation on the last real image to form a modulated light field carrying the real image information; as well as The receiving module (40) is arranged on the optical path of the outgoing light of the spatial light modulation module (30) and is used for receiving the modulated light field and converting the modulated light field into an electrical signal.

11. A correlation imaging detection system, characterized in that: It comprises an associated imaging detection device and a computing device (200) as described in any one of claims 1 to 10, wherein the associated imaging detection device transmits the electrical signal carrying target information to the computing device (200), and the computing device (200) calculates the image of the target based on the electrical signal.

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