CN111751840A - Associated imaging detection device and system - Google Patents

Associated imaging detection device and system Download PDF

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Publication number
CN111751840A
CN111751840A CN202010524525.0A CN202010524525A CN111751840A CN 111751840 A CN111751840 A CN 111751840A CN 202010524525 A CN202010524525 A CN 202010524525A CN 111751840 A CN111751840 A CN 111751840A
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lens
real image
module
light field
lens module
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不公告发明人
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DeepRoute AI Ltd
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DeepRoute AI Ltd
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
    • G01S17/88—Lidar systems specially adapted for specific applications
    • G01S17/89—Lidar systems specially adapted for specific applications for mapping or imaging
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
    • G01S7/481—Constructional features, e.g. arrangements of optical elements
    • G01S7/4816—Constructional features, e.g. arrangements of optical elements of receivers alone
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/0075—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 with means for altering, e.g. increasing, the depth of field or depth of focus

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  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Optics & Photonics (AREA)
  • Electromagnetism (AREA)
  • Studio Devices (AREA)

Abstract

The application relates to a correlation imaging detection device and system. The related imaging detection device is provided with a first lens module, and a first real image is formed on one side of the emergent light of the first lens module. The first real image can be further imaged by arranging the second lens module, namely, a second real image is formed on one side of the second lens module, which is far away from the first real image, the second real image is conjugated with the first real image, and the spatial light modulation module is arranged at the position of the second real image. Therefore, the distance between the first lens module and the spatial light modulation module can be prolonged by the arrangement of the second lens module, so that the situation that the first lens module shields light which is modulated by the spatial light modulation module and then enters the receiving module is avoided when the first lens module is used alone, the integrity of an electric signal which is acquired by the associated imaging detection device and carries target information can be improved, and the quality of an optical signal is improved.

Description

Associated imaging detection device and system
Technical Field
The present application relates to the field of correlation imaging technologies, and in particular, to a correlation imaging detection apparatus and system.
Background
Ghost imaging is a novel imaging technology, and an image of an object is restored through a correlation algorithm or a compressed sensing method and the like. Compared with the traditional imaging mode, ghost imaging has the advantages of high sensitivity, low cost and the like, and can be applied to the fields of remote sensing, laser radar, video monitoring and the like.
In a conventional related imaging system, a single lens is often used as a receiving lens, which causes the modulated light field to be blocked by the single lens or a clamping member thereof, thereby affecting the imaging quality.
Disclosure of Invention
Therefore, it is necessary to provide a related imaging detection apparatus and system for solving the problem that the modulated light field is blocked by the single lens or the clamping member thereof due to the single lens serving as the receiving lens.
The application provides a correlation imaging detection device, includes:
the first lens module is used for receiving 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;
a second lens module, disposed on a light path of light emitted from the first lens module, for receiving the first real image, where the first real image passes through the second lens module to form a second real image of the target, and the second real image is conjugate to the first real image;
the spatial light modulation module is arranged on a light path of light rays emitted from the second lens module, is positioned on a plane where the second real image is positioned, and is used for receiving the second real image and carrying out spatial modulation on the second real image to form a modulated light field carrying information of the second real image; and
and the receiving module is arranged on a light path of the emergent light of the spatial light modulation module and used for receiving the modulated light field and converting the modulated light field into an electric signal.
In one embodiment, the receiving module includes:
the third lens module is arranged on a light path of light rays emitted from the spatial light modulation module and used for converging the modulated light field; and
and the detector is arranged on a light path of the emergent light of the third lens module and used for receiving the converged modulated light field and converting the modulated light field into an electric signal.
In one embodiment, 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).
In one embodiment, the third lens module includes a converging lens disposed on an optical path of the light emitted from the spatial light modulation module for converging the modulated light field.
In one embodiment, the spatial light modulation module includes a Digital micromirror array (DMD), the DMD being disposed on a light path of light emitted from the second lens module and located on a plane where the second real image is located, and the DMD being configured to receive the second real image and modulate the second real image to form the modulated light field carrying information of the second real image; or
The spatial light modulation module comprises an absorption modulator, the absorption modulator is arranged on a light path of light rays emitted from the second lens module, is positioned on a plane where the second real image is located, and is used for receiving the second real image and modulating the second real image to form the modulated light field carrying information of the second real image, wherein the absorption modulator comprises a superconducting material module.
In one embodiment, the first lens module includes a first single lens for receiving an incident light field carrying target information, the incident light field forming the first real image of the target after passing through the first single lens; or
The first lens module comprises a first cemented lens and is used for receiving 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
The first lens module comprises a first lens group, the first lens group comprises a plurality of lenses, the lenses are sequentially arranged on a light path transmitted by the incident light field according to a preset sequence and used for receiving the incident light field carrying target information, and the incident light field forms the first real image of the target after passing through the first lens group.
In one embodiment, the second lens module includes a second single lens disposed on an optical path of light rays exiting from the first lens module for receiving the incident light field, the incident light field forming the second real image of the object through the second single lens; or
The second lens module comprises a second cemented lens, the second cemented lens is arranged on a light path of light rays emitted from the first lens module and is used for receiving the incident light field, and the incident light field forms the second real image of the target through the second cemented lens; or
The second lens module comprises a second lens group, the second lens group comprises a plurality of lenses, the lenses are sequentially arranged on a light path of emergent light rays from the first lens module according to a preset sequence, the second lens group is used for receiving the incident light field, and the incident light field forms the second real image of the target through the second lens group.
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.
In one embodiment, the second single lens, the second cemented lens and/or the second lens group are made of a metamaterial.
Based on the same inventive concept, the present application further provides a correlated imaging detection apparatus, comprising:
the at least three fourth lens modules are used for receiving 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, and the real images formed by two adjacent fourth lens modules are conjugated;
the spatial light modulation module is arranged on a light path of light rays emitted from the last fourth lens module, is positioned on the plane of the last real image, and is used for receiving the last real image and carrying out spatial modulation on the last real image to form a modulated light field carrying real image information; and
and the receiving module is arranged on a light path of the emergent light of the spatial light modulation module and used for receiving the modulated light field and converting the modulated light field into an electric signal.
Based on the same inventive concept, the present application further provides a correlation imaging detection system, which includes any one of the correlation imaging detection devices described in the above embodiments and a computing device, wherein the correlation imaging detection device transmits the electrical signal carrying target information to the computing device, and the computing device computes an image of the target according to the electrical signal.
In the associated imaging detection apparatus provided in the above embodiment, the first lens module forms the first real image, the second lens module forms the second real image on a side of the second lens module away from the first real image, the second real image is conjugate to the first real image, and the spatial light modulation module is disposed at a position where the second real image is located. Therefore, the second lens module does not change the property of the first real image, and the arrangement of the second lens module can prolong the distance between the first lens module and the spatial light modulation module, so that the situation that when the first lens module is used alone, the first lens module shields the light which is modulated by the spatial light modulation module and then enters the receiving module is avoided, and the integrity of the electric signal which is acquired by the associated imaging detection device and carries the target information can be improved.
Drawings
Fig. 1 is a schematic view of a connection structure of a first related imaging detection apparatus according to an embodiment of the present application;
fig. 2 is a schematic view of a connection structure of a second related imaging detection apparatus provided in an embodiment of the present application;
fig. 3 is a schematic view of an optical path structure of an associated imaging detection apparatus according to an embodiment of the present disclosure;
fig. 4 is a schematic view of a connection structure of a third related imaging detection apparatus provided in an embodiment of the present application;
fig. 5 is a schematic view of a connection structure of a fourth related imaging detection apparatus provided in the embodiment of the present application;
fig. 6 is a schematic view of a connection structure of a fifth related imaging detection apparatus according to an embodiment of the present application;
fig. 7 is a schematic view of a connection structure of a sixth related imaging detection apparatus according to an embodiment of the present application;
fig. 8 is a schematic view of a connection structure of a seventh related imaging detection apparatus according to an embodiment of the present application;
fig. 9 is a schematic view of a connection structure of an associated imaging detection system according to an embodiment of the present application. Description of the reference numerals
100-correlation imaging detection device
10 first lens module
110 first single lens
120 first cemented lens
130 first lens group
20 second lens module
210 second einzel lens
220 second cemented lens
230 second lens group
30 space modulation module
310 digital micromirror array
320 absorption modulator
40 receiving module
410 third lens module
420 Detector
50 fourth lens module
200 computing device
Detailed Description
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of embodiments in many different forms than those described herein and those skilled in the art will be able to make similar modifications without departing from the spirit of the application and it is therefore not intended to be limited to the embodiments disclosed below.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1, the present application provides a correlated imaging detection apparatus 100. The correlated imaging detection apparatus 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 configured 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 disposed on the light path of the light emitted from the first lens module 10, and is configured to receive a first real image, where 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 to the first real image. The spatial light modulation module 30 is disposed on the light 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 configured 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. The receiving module 40 is disposed on a light path of the light emitted from the spatial light modulation module 30, and is configured to receive the modulated light field and convert the modulated light field into an electrical signal.
It is to be understood that the correlation imaging detection apparatus 100 provided herein may be applied to an active illumination correlation imaging system. In the active illumination correlation imaging system, a light source module may be used to illuminate a target, and light is incident on a surface of the target and then reflected by the target to form an incident light field of the first lens module 10, where the incident light field carries target information that can be used for imaging the target. In one embodiment, the light source module may include a laser, and laser is used as an active illumination light source, which may improve a signal-to-noise ratio of an incident light field of the first lens module 10, thereby improving quality of an electrical signal obtained by the associated imaging detection apparatus 100 and improving an associated imaging effect. In one embodiment, the correlation imaging detection apparatus 100 provided herein can also be applied to a passive illumination correlation imaging system. In the passive illumination associated imaging system, a light source module is not required to be arranged. The natural light irradiates the target, and forms an incident light field of the first lens module 10 after being reflected by the target surface. Similarly, the incident light field of the first lens module 10 in the passive illumination correlation imaging system also carries target information that can be used for target imaging.
It is understood that the first lens module 10 can receive an incident light field carrying object information and form a first real image on the side of the first lens module 10 from which light rays emerge. The light field forming the first real image continues along its original transmission direction and may be incident on the second lens module 20 and form a second real image on the side of the second lens module 20 remote from the first real image. In this embodiment, the second real image is conjugate to the first real image, i.e. the second real image has the same properties as the first real image. Therefore, the arrangement 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 property, so that when the first lens module 10 is used alone, the first lens module 10 blocks the light modulated by the spatial light modulation module 30 and then enters the receiving module 40, and the quality of the electrical signal obtained by the associated imaging detection apparatus 100 is improved.
The spatial light modulation module 30 may modulate a certain parameter of the light field by the spatial light modulation unit under active control. In one embodiment, the spatial light modulation module 30 may modulate the amplitude of the light field, so as to write the predetermined information into the light wave, thereby achieving the purpose of light wave modulation. The spatial light modulation module 30 may be disposed on the optical path of the light emitted from the second lens module 20 and located on the plane of the second real image. The spatial light modulation module 30 can be configured to receive the second real image and spatially modulate the second real image to form a modulated light field carrying information of the second real image. It is to be understood that the spatial light modulation device in the spatial light modulation module 30 is not particularly limited in the present application, as long as it can realize the acquisition of the associated imaging electric signal in combination with the receiving module 40. Specifically, the spatial light modulation module 30 may be a digital micromirror device, an acousto-optic deflector, or a metamaterial (which may be a light-manipulating metamaterial), etc. In one embodiment, the Spatial Light modulation module 30 may include a reflective Spatial Light Modulator (SLM), and the receiving module 40 may be disposed on an outgoing Light path of the reflective Spatial Light Modulator.
The receiving module 40 may be configured to receive a modulated light field, where the modulated light field includes required information that may be used for performing correlation imaging calculation, and the receiving module 40 may convert an optical signal carrying target information into an electrical signal, so that the computing device 200 electrically connected to the receiving module 40 may perform correlation imaging calculation according to the received electrical signal and a modulation signal sent by a control system, thereby obtaining an image of a target.
The above-mentioned embodiment provides the correlated imaging detection apparatus 100, which can form the first real image on the 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 a side of the second lens module 20 away from the first real image, the second real image is conjugate to the first real image, and the spatial light modulation module 30 is disposed at a position of the second real image. Therefore, the property of the first real image is not changed by the second lens module 20, and the distance between the first lens module 10 and the spatial light modulation module 30 can be extended by the arrangement of the second lens module 20, so that when the first lens module 10 is used alone, the first lens module 10 blocks the light which is modulated by the spatial light modulation module 30 and then enters the receiving module 40, and the integrity of the electrical signal carrying the target information and acquired by the associated imaging detection apparatus 100 can be improved.
Referring also to fig. 2-3, in one embodiment, the receiving module 40 includes a third lens module 410 and a detector 420. The third lens module 410 is disposed on the light path of the light emitted from the spatial light modulation module 30, and is used for converging the modulated light field. The detector 420 is disposed on a light path of the emergent light of the third lens module 410, and is configured 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, and in order to ensure that the detector 420 can acquire all the light signals carrying the target information, the third lens module 410 may be arranged to converge and shape the modulated light field. The specific position of the third lens module 410, the number of lenses included therein, and the parameters thereof can be selected according to the position settings and the models of the spatial light modulation module 30 and the detector 420, which is not limited in this application. In one embodiment, the third lens module 410 may include a converging lens disposed on the optical path of the light exiting from the spatial light modulation module 30 for converging the modulated light field. In another embodiment, the third lens module 410 may further 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, etc., as long as it can converge and shape the modulated light field.
In one embodiment, the detector 420 may be a single pixel detector. The single-pixel detector is suitable for an indirect imaging mode without an array detector, and the spatial light modulation module 30 can replace a detector array in the traditional imaging scheme to acquire light field intensity correlation information carrying target information. It is understood that the spatial light modulation module 30 modulates the light field to form a modulated light field, and 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 (correlation operation, compressed sensing algorithm, or the like) the electrical signal carrying the target information and the modulation signal sent by the control system, thereby obtaining the image of the target. Compared with the traditional geometric imaging mode, the single-pixel camera has the advantages of high sensitivity, low cost and the like when being used for associated imaging, and can be applied to the fields of remote sensing, investigation, geological exploration and the like. In another embodiment, the detector 420 may 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 requirement of the associated imaging detection apparatus 100, that is, the light field intensity related information carrying the target information can be acquired in combination with the spatial light modulation module 30. It should be noted that, the specific type of the detector 420 is not limited in this application, and it is within the protection scope of this application as long as it can receive the converged modulated optical field and convert the modulated optical field into an electrical signal.
Referring to fig. 4, in one embodiment, the spatial light modulation module 30 includes a digital micromirror array 310, and the digital micromirror array 310 is disposed on the light path of the light emitted from the second lens module 20 and located on the plane of the second real image, and is configured to receive the second real image and modulate the second real image to form a modulated light field carrying information of the second real image. The digital micromirror array 310 is a light modulation device consisting of an array of micron-sized aluminum mirrors, each micromirror having only two states, on and off (i.e., +12 and-12 degrees rotated about its diagonal), that can modulate the amplitude of light specifically. In the embodiment, the light carrying the target information first forms a first real image through the first lens module 10, the first real image is imaged onto the dmd array 310 through the second lens module 20 to form a second real image, and the second real image is amplitude-modulated by the dmd array 310. In one embodiment, the preset micromirrors on the dmd array 310 may be turned by +12 ° for each measurement, so that the modulated light is rotated by 24 ° and reflected to the converging lens for focusing and detection by the single pixel detector. It will be appreciated that the digital micromirror array 310 has the advantages of full digitization and high image quality, and can achieve precise amplitude modulation of the second real image, thereby ensuring the imaging quality of the associated imaging.
In another embodiment, the spatial light modulation module 30 includes an absorption modulator 320, the absorption modulator 320 is disposed on the optical path of the light beam emitted from the second lens module 20, and is located at the plane of the second real image, and is configured to receive the second real image and modulate the second real image to form a modulated light field carrying information of the second real image, where the absorption modulator 320 includes a superconducting material module. In one embodiment, the spatial light modulation module 30 may further include one of any spatial light modulators, such as a low temperature LCOS spatial light modulator, a reflective spatial light modulator, a transmissive spatial light modulator, and the like, and may adaptively adjust the optical path structure according to the type of the spatial light modulator. It should be noted that, the type of the spatial light modulator included in the spatial light modulation module 30 is not specifically limited in this application, and it is within the scope of the present application as long as it can implement spatial modulation on the second real image to form a modulated light field carrying information of the second real image.
Referring to fig. 2-5, in one embodiment, the first lens module 10 includes a first single lens 110 for receiving 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, configured to receive an incident light field carrying target information, where 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, and the first lens group 130 includes a plurality of lenses, which are sequentially disposed on a light path transmitted by an incident light field according to a preset sequence, and are configured to receive the incident light field carrying the target information, and the incident light field forms a first real image of the target after passing through the first lens group 130.
In one embodiment, the second lens module 20 includes a second single lens 210, and the second single lens 210 is disposed on the optical path of the light emitted from the first lens module 10 and is used for receiving an 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.
Referring to fig. 6-7, in one embodiment, the second lens module 20 includes a second cemented lens 220, the second cemented lens 220 is disposed on the light path of the light emitted from the first lens module 10 and is used for receiving an 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, the second lens group 230 includes a plurality of lenses, the plurality of lenses are sequentially disposed on the light path of the light emitted from the first lens module 10 according to a predetermined sequence, the second lens group 230 is configured to receive an incident light field, and the incident light field forms a second real image of the object through the second lens group 230. It is understood that in the second lens module 20, the second cemented lens 220 or the second lens group 230 may be used instead of 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 a metamaterial, and the first single lens 110, the first cemented lens 120 and the first lens group 130 are also made of a metamaterial. 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, and the second lens group 230 in the second lens module 20 can be combined arbitrarily, which is not limited in the drawings of the present application.
It can be understood that if only a single lens is used as the receiving lens, there is aberration during imaging, which results in imaging blur, and the lens group can reduce aberration when used as the receiving lens, however, since the back focal length of the lens group is short, after the spatial light modulation module 30 modulates the image of the target, the formed modulated light field is easily blocked by the lens group or the holder of the lens group during transmission, which affects the detection of the signal of the single-pixel detector, thereby affecting the effect of correlated imaging. By employing a combination of the first lens module 10 and the second lens module 20 in the receive optical path instead of a single singlet lens, wherein the first lens module 10 and/or the second lens module 20 may comprise one or more coaxial singlet or lens groups. In one embodiment, the second single lens 210 may be disposed on the light path of the emergent light of the first single lens 110, and the combination of the first single lens 110 and the second single lens 210 may prevent the modulated light field reflected by the spatial light modulation module 30 after the modulation of the object imaging from being blocked by the lens group, so as to improve the effect of the associated imaging.
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) to form a second real image on the conjugate plane of the first real image with respect to the second single lens 210, and the spatial light modulation module 30 may be disposed at the position of the second real image and perform spatial modulation on the second real image. It can be understood that, by selecting the second single lens 210 with a proper 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 correlated imaging can be improved.
Referring to fig. 8, based on the same inventive concept, the present application further provides a related imaging detection apparatus 100. The correlated imaging detection apparatus 100 includes at least three fourth lens modules 50, a spatial light modulation module 30, and a receiving module 40. The at least three fourth lens modules 50 are configured 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 conjugated. The spatial light modulation module 30 is disposed on the light path of the light emitted from the last fourth lens module 50, and is located on the plane of the last real image, and is configured 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 disposed on a light path of the light emitted from the spatial light modulation module 30, and is configured to receive the modulated light field and convert the modulated light field into an electrical signal. In the present embodiment, the number of the fourth lens modules 50 is not particularly limited, and may be set according to the requirements of the associated imaging detection apparatus 100.
Referring to fig. 9, based on the same inventive concept, the present application further provides a related imaging detection system, including the related imaging detection apparatus 100 and the computing apparatus 200 in any of the above embodiments, wherein the related imaging detection apparatus 100 transmits an electrical signal carrying target information to the computing apparatus 200, and the computing apparatus 200 computes an image of the target according to the electrical signal. It is understood that the associated imaging detection apparatus 100 may be the associated imaging detection apparatus 100 in any of the above embodiments, and the description thereof is omitted here. In one embodiment, the computing device 200 may include a control module and a signal processing module, and the control module and the signal processing module are electrically connected. The control module may serve as a control system of the associated imaging detection system, and may generate a modulation signal and send the modulation signal to the spatial light modulation module 30. The signal processing module may receive the electrical signal carrying the target information output by the correlated imaging detection apparatus 100, and perform correlation calculation by combining the modulation signal to obtain an image of the target. In one embodiment, the computing device 200 may be a micro-control unit or a computer, which may apply various related imaging algorithms or compressive sensing algorithms, etc. in the prior art to process the electrical signals output by the related imaging detection device 100, so as to obtain an image of the target. It can be understood that the implementation process of using the associated imaging algorithm or the compressive sensing algorithm to perform the operation on the modulation signal and the electrical signal may refer to the method in the existing literature, and is not described herein again.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (11)

1. An associative imaging detection apparatus, comprising:
the first lens module (10) is used for receiving 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);
a second lens module (20) disposed on a light path of light rays emitted from the first lens module (10) for receiving the first real image, the first real image forming a second real image of the object through the second lens module (20), the second real image being conjugate to the first real image;
the spatial light modulation module (30) is arranged on a light path of light rays emitted from the second lens module (20), is positioned on a plane where the second real image is positioned, and is used for receiving the second real image and carrying out spatial modulation on the second real image to form a modulated light field carrying second real image information; and
and the receiving module (40) is arranged on a light path of the emergent 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 electric signal.
2. The correlated imaging detection apparatus according to claim 1, characterized in that said receiving module (40) comprises:
the third lens module (410) is arranged on a light path of light rays emitted from the spatial light modulation module (30) and used for converging the modulated light field; and
and the detector (420) is arranged on a light path of the emergent light of the third lens module (410) and used for receiving the converged modulated light field and converting the modulated light field into an electric signal.
3. The correlated imaging detection apparatus of claim 2, wherein said 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 correlated imaging detection apparatus of claim 2, wherein said third lens module (410) comprises a converging lens disposed on the optical path of the light rays exiting from said spatial light modulation module (30) for converging said modulated light field.
5. The correlated imaging detection apparatus according to claim 1, wherein the spatial light modulation module (30) includes a digital micromirror array (310), the digital micromirror array (310) is disposed on the optical path of the light emitted from the second lens module (20) and located at the plane of the second real image, and is configured to receive the second real image and modulate the second real image to form the modulated light field carrying the information of the second real image; or
The spatial light modulation module (30) comprises an absorption modulator (320), the absorption modulator (320) is arranged on a light path of light rays emitted from the second lens module (20), is located on a plane where the second real image is located, and is used for receiving the second real image and modulating the second real image to form the modulated light field carrying information of the second real image, wherein the absorption modulator (320) comprises a superconducting material module.
6. The correlated imaging detection apparatus according to claim 1, wherein said first lens module (10) comprises a first single lens (110) for receiving an incident light field carrying target information, said incident light field forming said first real image of said target after passing through said 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, the incident light field forming 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) comprises a plurality of lenses, the lenses are sequentially arranged on a light path transmitted by the incident light field according to a preset sequence and are used for receiving the incident light field carrying target information, and the incident light field forms the first real image of the target after passing through the first lens group (130).
7. The correlated imaging detection apparatus according to claim 1, wherein said second lens module (20) comprises a second single lens (210), said second single lens (210) being disposed on the optical path of the light rays exiting from said first lens module (10) for receiving said incident light field, said incident light field forming said second real image of said object through said 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 the outgoing light rays from the first lens module (10) for receiving the incident light field, the incident light field forming the second real image of the object via 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 lenses are sequentially arranged on a light path of emergent light rays from the first lens module (10) according to a preset sequence, the second lens group (230) is used for receiving 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 correlated imaging detection device of claim 7, characterized in that said second single lens (210) is a convex lens, and the image distance of said convex lens is larger than the back focal length of said first lens module (10).
9. The correlated imaging detection apparatus of claim 7, characterized in that said second single lens (210), said second cemented lens (220) and/or said second lens group (230) are made of metamaterials.
10. An associative imaging detection apparatus, comprising:
at least three fourth lens modules (50) for receiving an incident light field carrying target information, said incident light field forming a real image of said target after passing through each of said fourth lens modules (50), said real image formed by two adjacent fourth lens modules (50) being conjugate;
the spatial light modulation module (30) is arranged on a light path of light rays emitted from the last fourth lens module (50), is positioned on the plane where the last real image is positioned, and is used for receiving the last real image and carrying out spatial modulation on the last real image to form a modulated light field carrying real image information; and
and the receiving module (40) is arranged on a light path of the emergent 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 electric signal.
11. An associative imaging detection system, comprising an associative imaging detection apparatus according to any one of claims 1 to 10 and a computing apparatus (200), wherein said associative imaging detection apparatus transmits said electrical signal carrying information of an object to said computing apparatus (200), and said computing apparatus (200) computes an image of said object from said electrical signal.
CN202010524525.0A 2020-06-10 2020-06-10 Associated imaging detection device and system Pending CN111751840A (en)

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