CN112485793B - Optical and radar common-aperture composite imaging system and method - Google Patents
Optical and radar common-aperture composite imaging system and method Download PDFInfo
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- CN112485793B CN112485793B CN202011194856.9A CN202011194856A CN112485793B CN 112485793 B CN112485793 B CN 112485793B CN 202011194856 A CN202011194856 A CN 202011194856A CN 112485793 B CN112485793 B CN 112485793B
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- 238000003384 imaging method Methods 0.000 title claims abstract description 34
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- 238000000034 method Methods 0.000 title claims abstract description 6
- 238000012634 optical imaging Methods 0.000 claims abstract description 29
- 230000003595 spectral effect Effects 0.000 claims abstract description 19
- 230000005540 biological transmission Effects 0.000 claims abstract description 6
- 229910052751 metal Inorganic materials 0.000 claims description 23
- 239000002184 metal Substances 0.000 claims description 23
- 239000011521 glass Substances 0.000 claims description 16
- 239000000463 material Substances 0.000 claims description 10
- 229910000990 Ni alloy Inorganic materials 0.000 claims description 8
- 230000004075 alteration Effects 0.000 claims description 8
- 239000000758 substrate Substances 0.000 claims description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical group O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 5
- 239000005350 fused silica glass Substances 0.000 claims description 5
- 230000004927 fusion Effects 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 3
- 229910052737 gold Inorganic materials 0.000 claims description 3
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- 238000002044 microwave spectrum Methods 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 2
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- 229910052782 aluminium Inorganic materials 0.000 description 4
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Classifications
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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
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/88—Radar or analogous systems specially adapted for specific applications
- G01S13/89—Radar or analogous systems specially adapted for specific applications for mapping or imaging
- G01S13/90—Radar or analogous systems specially adapted for specific applications for mapping or imaging using synthetic aperture techniques, e.g. synthetic aperture radar [SAR] techniques
- G01S13/9004—SAR image acquisition techniques
- G01S13/9005—SAR image acquisition techniques with optical processing of the SAR signals
-
- 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
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/86—Combinations of radar systems with non-radar systems, e.g. sonar, direction finder
- G01S13/865—Combination of radar systems with lidar systems
-
- 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
- G01S17/90—Lidar systems specially adapted for specific applications for mapping or imaging using synthetic aperture techniques
Abstract
The invention relates to a space remote sensing technology, in particular to an optical and radar common-aperture composite imaging system and method, which are used for solving the problems that in the optical imaging of a remote sensing satellite, the volume and the mass of a radar and an optical imaging system are large and the resolution of a synthesized image is low. The technical scheme adopted by the invention is as follows: an optical and radar common-aperture composite imaging system comprises a receiving and transmitting unit, a beam splitting and frequency dividing unit, a phased array radar receiving and transmitting system and a rear optical imaging system; the receiving and transmitting unit comprises a main reflector synthetic aperture radar antenna and a secondary reflector synthetic aperture radar antenna; the light-splitting frequency-dividing unit is a light-transmitting reflection microwave light-splitting frequency-dividing device; the phased array radar receiving and transmitting system and the rear optical imaging system are respectively arranged on a microwave reflection route and an optical transmission route of the light-transmitting and reflecting microwave spectral frequency dividing device. The invention also provides an optical and radar common-aperture composite imaging method.
Description
Technical Field
The invention relates to a space remote sensing technology, in particular to an optical and radar common-aperture composite imaging system and method.
Background
The satellite platform is utilized to realize high-resolution imaging remote sensing on the ground, so that more convenient and more detailed data sources can be obtained in civil fields such as land utilization, urban planning, environment monitoring and the like. At present, optical imaging of a remote sensing satellite has a higher resolution level, but the optical imaging is easily influenced by illumination conditions and weather, distance information cannot be given, and a synthetic aperture radar has ranging and all-weather working capabilities in the whole day, but the resolution is relatively low.
In the existing remote sensing satellite optical imaging, the radar and the optical imaging system are respectively and independently arranged in a remote sensing satellite, the space of the radar and the space of the optical imaging system are huge, the radar and the optical imaging system have large weight and are limited by the installation volume of a satellite platform, long-time operation of the remote sensing satellite is not facilitated, and when the radar and the optical imaging system synchronously detect, the image error is large, so that the resolution of the synthesized image is low.
Disclosure of Invention
The invention aims to solve the problems of large volume, heavy mass and lower resolution of a synthesized image of a radar and an optical imaging system in the conventional remote sensing satellite optical imaging, and provides an optical and radar common-aperture composite imaging system and a method.
The technical scheme adopted by the invention is as follows: the optical and radar common-aperture composite imaging system is characterized by comprising a receiving and transmitting unit, a beam splitting and frequency dividing unit, a phased array radar receiving and transmitting system and a rear optical imaging system;
the receiving and transmitting unit comprises a main reflector synthetic aperture radar antenna and a secondary reflector synthetic aperture radar antenna;
the light-splitting frequency-dividing unit is a light-transmitting reflection microwave light-splitting frequency-dividing device;
the microwave signals sent by the phased array radar receiving and transmitting system are sequentially reflected by the light-transmitting and reflecting microwave light-splitting frequency-dividing device, the secondary reflector synthetic aperture radar antenna and the main reflector synthetic aperture radar antenna and then sent to the ground;
the main reflector synthetic aperture radar antenna collects microwave scattering signals and sequentially reflects the signals to the secondary reflector synthetic aperture radar antenna and the light-transmitting and reflecting microwave spectral frequency dividing device;
the phased array radar receiving and transmitting system is arranged on a microwave reflection route of the light-transmitting and reflecting microwave light-splitting frequency-dividing device;
the rear optical imaging system is arranged on an optical transmission route of the light-transmitting and reflecting microwave spectral frequency division device.
Further, the reflecting mirror surface of the main reflecting mirror synthetic aperture radar antenna is a paraboloid, the caliber of the reflecting mirror surface is 2 m-5 m, and the curvature radius is 4.6m-10m; the surface of the mirror blank of the reflecting mirror surface is provided with a nickel alloy layer with the thickness of 50-100 mu m.
Further, the reflecting mirror surface of the secondary reflecting mirror synthetic aperture radar antenna is a paraboloid, the caliber of the reflecting mirror surface is 0.5 m-0.6 m, and the curvature radius is 1.5 m-1.8 m; the surface of the mirror blank of the reflecting mirror surface is provided with a nickel alloy layer with the thickness of 10 mu m to 50 mu m.
Further, the back optical imaging system comprises an off-axis three-reflection aberration lens group and an optical detector, wherein the off-axis three-reflection aberration lens group is used for converging the transmission optical wave band reflection of the light-transmission reflection microwave spectral frequency division device to the optical detector.
Further, the phased array radar receiving and transmitting system comprises a phased array microwave feed source, a receiver and a transmitter, wherein the phased array microwave feed source is used for generating microwaves, and the receiver and the transmitter are respectively used for receiving and transmitting microwave signals.
Further, the light-transmitting and reflecting microwave splitting frequency divider comprises a glass plate and metal wire grids arranged on the glass plate, wherein the width of each metal wire is 0-5 mu m, and the distance between the metal grids is less than 1/20 of the wavelength of microwaves; the metal wires are etched on the surface of the glass plate.
Further, the substrate material of the glass plate is fused quartz glass, and the caliber is 0.75 m-1.2 m; the metal wire grids are orthogonal two-dimensional metal grids, and gold or copper is selected as a material of the metal wire grids.
The invention also provides an imaging method based on the optical and radar common-aperture composite imaging system, which comprises the following steps:
1) Emission of microwave signals
1.1 A phased array radar receiving and transmitting system transmits microwave signals to a light-transmitting and reflecting microwave light-splitting frequency-dividing device;
1.2 The microwave signal is reflected to the ground through the light-transmitting and reflecting microwave light-splitting frequency-dividing device, the secondary reflector synthetic aperture radar antenna and the main reflector synthetic aperture radar antenna in sequence;
2) Optical band and reception of microwave signals
2.1 The ground passive optical wave band and the microwave scattered by the ground are sequentially incident to the main reflector synthetic aperture radar antenna, the secondary reflector synthetic aperture radar antenna and the light-transmitting reflection microwave spectral frequency division device;
2.2 After being reflected by the light-transmitting reflection microwave light-splitting frequency-dividing device, the microwaves enter a phased array radar receiving-transmitting system;
the ground passive optical wave band enters a rear optical imaging system after being transmitted by a light-transmitting reflection microwave light-splitting frequency-dividing device;
3) Optical band and microwave signal processing
The phased array radar receiving and transmitting system sends microwave signals to the ground signal processor, the rear optical imaging system sends optical wave bands to the ground signal processor, and the ground signal processor carries out heterogeneous image fusion on the microwave signals and the optical wave bands.
Further, in step 1.1), the substrate material of the light-transmitting and reflecting microwave spectrum frequency dividing device is fused quartz glass, and the surface of the glass is etched with orthogonal two-dimensional metal grids.
Compared with the prior art, the invention has the following beneficial effects.
1. The invention adopts an optical and radar common-aperture composite imaging system, which carries out common-aperture design on the optical and radar, so that the radar antenna and a visible light imaging reflector work in a common-aperture and common-view mode: the optical wave band with the micrometer scale and the microwave with the millimeter scale can realize advantage complementation in an imaging mode, enhance the identification capability of targets, optimize heterogeneous image fusion and improve the resolution of a synthesized image, and can be widely applied to the fields of urban building three-dimensional imaging, geological disaster assessment such as earthquake flood and the like.
2. The optical and radar common-aperture composite imaging system adopted by the invention has the advantages of small volume, light weight and the like, is suitable for space remote sensing imaging environments, avoids the problem of limit of the installation volume of a satellite platform, and prolongs the operation time of a remote sensing satellite.
3. According to the optical and radar common-aperture composite imaging system, the light-transmitting and reflecting microwave spectral frequency division device is arranged, the optical transmittance is more than 85%, the millimeter wave reflectivity is more than 90%, the resolution of 0.5m of visible light can be realized at a distance of 500km, and the resolution of 1m of the synthetic aperture radar is realized.
4. According to the optical and radar common-aperture composite imaging system, the nickel alloy layer is arranged on the surface of the mirror blank of the main and secondary reflecting mirror synthetic aperture radar antenna reflecting mirror, so that high reflectivity of an optical wave band and microwaves can be ensured.
5. The rear optical imaging system adopts an off-axis imaging structure, so that microwave energy attenuation is effectively reduced.
Drawings
FIG. 1 is a block diagram of an optical and radar co-aperture composite imaging system according to the present invention.
Fig. 2 is a block diagram of an optical system according to the present invention.
Fig. 3 is a diagram of a structure of a synthetic aperture radar antenna system according to the present invention.
Fig. 4 is an enlarged schematic view of a phased array microwave feed of the present invention.
Fig. 5 is a schematic diagram of the arrangement of metal grids of the light-transmitting and reflecting microwave spectral frequency divider in the invention.
In the figure:
the system comprises a 1-main reflector synthetic aperture radar antenna, a 2-secondary reflector synthetic aperture radar antenna, a 3-light-transmitting reflection microwave spectral frequency divider, a 4-off-axis three-reflection aberration lens group, a 5-phased array radar receiving and transmitting system, a 5.1-phased array microwave feed source, a 5.2-phased array feed source focus and a 6-optical detector.
Detailed Description
The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention and the accompanying drawings, and it is apparent that the described embodiments do not limit the present invention.
As shown in fig. 1, 2 and 3, an optical and radar common-aperture composite imaging system in the present embodiment includes a transceiver unit, a spectral frequency division unit, a phased array radar transceiver system 5 and a rear optical imaging system;
the receiving and transmitting unit comprises a main reflector synthetic aperture radar antenna 1 and a secondary reflector synthetic aperture radar antenna 2;
the light-splitting frequency-dividing unit is a light-transmitting and reflecting microwave light-splitting frequency-dividing device 3;
the microwave signal sent by the phased array radar receiving and transmitting system 5 is transmitted to the ground through a common window after being reflected by the light-transmitting and reflecting microwave light-splitting frequency-dividing device 3, the secondary reflector synthetic aperture radar antenna 2 and the main reflector synthetic aperture radar antenna 1 in sequence;
the main reflector synthetic aperture radar antenna 1 collects microwave scattering signals and ground passive optical wave bands through a common window and sequentially reflects the signals to the sub-reflector synthetic aperture radar antenna 2 and the light-transmitting reflection microwave spectral frequency division device 3; the phased array radar receiving and transmitting system 5 is arranged on a microwave reflection route of the light-transmitting and reflecting microwave splitting and dividing device 3;
the rear optical imaging system is arranged on an optical transmission route of the light-transmitting and reflecting microwave spectral frequency division device 3.
The reflecting mirror surface of the main reflecting mirror synthetic aperture radar antenna 1 is a paraboloid, so that the energy receiving and transmitting of the near-earth orbit synthetic aperture radar can be ensured, the caliber of the reflecting mirror surface is 2m, and the curvature radius is 4.6m; can ensure high reflectivity to optics and microwaves at the same time;
the substrate material of the main reflector synthetic aperture radar antenna 1 is aluminum-based silicon carbide, a nickel alloy layer with the thickness of about 50-100 mu m (optimized according to the thickness of the reflector), preferably a nickel alloy layer with the thickness of 50 mu m, is plated after the mirror blank is machined, and an optical reflection aluminum or silver film is plated on the surface after polishing, wherein the thickness of the silver film can be selected to be 30nm.
The reflecting mirror surface of the secondary reflecting mirror synthetic aperture radar antenna 2 is a paraboloid, the caliber of the reflecting mirror surface is 0.5 m-0.6 m, and the curvature radius is 1.5 m-1.8 m; the mirror blank material of the reflecting mirror surface is silicon carbide or aluminum-based silicon carbide, nickel alloy with the thickness of about 10-50 mu m (optimized according to the thickness of the reflecting mirror) is plated after the mirror blank is machined, and then optical reflecting aluminum or silver film is plated after polishing is finished.
The back optical imaging system comprises an off-axis three-reflection aberration lens group 4 and an optical detector 6, wherein the off-axis three-reflection aberration lens group 4 is of an off-axis three-reflection aberration structure, and parallel compressed light beams received by the primary and secondary reflector synthetic aperture radars are converged on the optical detector 6.
The phased array radar receiving and transmitting system 5 comprises a phased array microwave feed source 5.1, a receiver and a transmitter, wherein as shown in fig. 4, the phased array microwave feed source 5.1 consists of orthogonal two-dimensional arranged combined feed sources, and a receiving and transmitting change-over switch can enable a single feed source to receive electromagnetic waves and transmit the electromagnetic waves; as shown in fig. 3, the phased array feed focus 5.2 is the position of the phased array single feed focus; the receiver and the transmitter are for receiving and transmitting, respectively, microwave signals.
According to the light-transmitting and reflecting microwave spectral frequency divider, fused quartz glass is preferred as a substrate, the caliber is 0.75m, as shown in fig. 5, orthogonal two-dimensional metal grids are etched on the surface of the glass by adopting a high-conductivity material, gold or copper is adopted as a metal wire grid material, the width of a metal wire is smaller than 5 mu m on the premise that the grid strength is ensured so as to ensure the optical transmittance, the distance between the metal wire grids is smaller than 1/20 of the microwave wavelength so as to ensure the microwave reflectivity, the distance between the metal wires can be set to be 500 mu m, and the width of the metal wire is set to be 5 mu m; the light-transmitting and reflecting microwave spectral frequency division device 3 can ensure that the reflectivity of the microwave is more than 90 percent and the optical transmittance is more than 85 percent.
The invention also provides an optical and synthetic aperture radar common aperture composite imaging method, which comprises the following steps:
1) Emission of microwave signals
1.1 A phased array radar transceiver system 5 transmits microwave signals to the light-transmitting and reflecting microwave spectral frequency division device 3;
1.2 The microwave signal is reflected to the ground through the light-transmitting and reflecting microwave light-splitting frequency-dividing device 3, the secondary reflector synthetic aperture radar antenna 2 and the main reflector synthetic aperture radar antenna 1 in sequence;
2) Optical band and reception of microwave signals
2.1 The ground passive optical wave band and the microwave scattered by the ground are sequentially incident to the main reflector synthetic aperture radar antenna 1, the secondary reflector synthetic aperture radar antenna 2 and the light-transmitting reflection microwave spectral frequency division device 3;
2.2 After being reflected by the light-transmitting and reflecting microwave light-splitting frequency-dividing device 3, the microwaves enter the phased array radar transceiver system 5;
the ground passive optical wave band enters a rear optical imaging system after being transmitted by the light-transmitting and reflecting microwave splitting and frequency dividing device 3;
3) Optical band and microwave signal processing
The phased array radar transceiver system 5 sends microwave signals to the ground signal processor, the rear optical imaging system sends optical wave bands to the ground signal processor, and the ground signal processor performs heterogeneous image fusion on the microwave signals and the optical wave bands.
The foregoing description is only illustrative of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the present invention and the accompanying drawings, or direct or indirect application in other related technical fields, are included in the scope of the present invention.
Claims (10)
1. An optical and radar common-aperture composite imaging system is characterized in that:
the system comprises a receiving and transmitting unit, a beam splitting and frequency dividing unit, a phased array radar receiving and transmitting system (5) and a rear optical imaging system;
the receiving and transmitting unit comprises a main reflector synthetic aperture radar antenna (1) and a secondary reflector synthetic aperture radar antenna (2);
the light-splitting frequency-dividing unit is a light-transmitting and reflecting microwave light-splitting frequency-dividing device (3);
the microwave signals sent by the phased array radar receiving and transmitting system (5) are sequentially reflected by the light-transmitting and reflecting microwave light-splitting frequency-dividing device (3), the secondary reflector synthetic aperture radar antenna (2) and the main reflector synthetic aperture radar antenna (1) and then sent to the ground;
the main reflector synthetic aperture radar antenna (1) collects microwave scattering signals and ground passive optical wave bands and sequentially reflects the signals to the secondary reflector synthetic aperture radar antenna (2) and the light-transmitting and reflecting microwave spectral frequency dividing device (3);
the phased array radar receiving and transmitting system (5) is arranged on a microwave reflection route of the light-transmitting and reflecting microwave light-splitting frequency-dividing device (3);
the rear optical imaging system is arranged on an optical transmission route of the light-transmitting and reflecting microwave light-splitting frequency-dividing device (3).
2. The optical and radar co-aperture composite imaging system of claim 1, wherein: the main reflector synthetic aperture radar antenna (1) has a parabolic reflector, the caliber of the reflector is 2 m-5 m, and the curvature radius is 4.6m-10m; the surface of the mirror blank of the reflecting mirror surface is provided with a nickel alloy layer with the thickness of 50-100 mu m.
3. The optical and radar co-aperture composite imaging system of claim 2, wherein: the reflecting mirror surface of the secondary reflecting mirror synthetic aperture radar antenna (2) is a paraboloid, the caliber of the reflecting mirror surface is 0.5 m-0.6 m, and the curvature radius is 1.5 m-1.8 m; the surface of the mirror blank of the reflecting mirror surface is provided with a nickel alloy layer with the thickness of 10 mu m to 50 mu m.
4. An optical and radar co-aperture composite imaging system according to any of claims 1-3, wherein: the back optical imaging system comprises an off-axis three-reflection aberration lens group (4) and an optical detector (6), wherein the off-axis three-reflection aberration lens group (4) is used for converging the transmission optical wave band reflection of the light-transmission reflection microwave spectral frequency division device (3) onto the optical detector (6).
5. The optical and radar co-aperture composite imaging system of claim 4, wherein: the light-transmitting and reflecting microwave spectrum frequency dividing device comprises a glass plate and metal wire grids arranged on the surface of the glass plate, wherein the width of each metal wire is 0-5 mu m, and the distance between the metal wires grids is smaller than 1/20 of the wavelength of microwaves.
6. The optical and radar co-aperture composite imaging system of claim 5, wherein: the metal wires are etched on the surface of the glass plate.
7. The optical and radar co-aperture composite imaging system of claim 6, wherein: the substrate material of the glass plate is fused quartz glass, and the caliber is 0.75 m-1.2 m.
8. The optical and radar co-aperture composite imaging system of claim 7, wherein: the metal wire grids are orthogonal two-dimensional metal grids, and gold or copper is selected as a material of the metal wire grids.
9. An optical and synthetic aperture radar co-aperture composite imaging method based on the optical and radar co-aperture composite imaging system of any one of claims 1 to 8, comprising the steps of:
1) Emission of microwave signals
1.1 A phased array radar receiving and transmitting system (5) transmits microwave signals to a light-transmitting and reflecting microwave light-splitting frequency-dividing device (3);
1.2 The microwave signal is reflected to the ground through a light-transmitting reflection microwave light-splitting frequency-dividing device (3), a secondary reflector synthetic aperture radar antenna (2) and a main reflector synthetic aperture radar antenna (1) in sequence;
2) Optical band and reception of microwave signals
2.1 The ground passive optical wave band and the microwave scattered by the ground are sequentially incident to a main reflector synthetic aperture radar antenna (1), a secondary reflector synthetic aperture radar antenna (2) and a light-transmitting reflection microwave spectral frequency division device (3);
2.2 After being reflected by the light-transmitting and reflecting microwave splitting frequency divider (3), the microwaves enter the phased array radar receiving and transmitting system (5);
the ground passive optical wave band enters a rear optical imaging system after being transmitted by a light-transmitting reflection microwave light-splitting frequency-dividing device (3);
3) Optical band and microwave signal processing
The phased array radar receiving and transmitting system (5) sends microwave signals to the ground signal processor, the rear optical imaging system sends optical wave bands to the ground signal processor, and the ground signal processor performs heterogeneous image fusion on the microwave signals and the optical wave bands.
10. The method of optical and synthetic aperture radar co-aperture composite imaging of claim 9, wherein: in the step 1.1), the substrate material of the light-transmitting and reflecting microwave spectral frequency division device (3) is fused quartz glass, and the surface of the glass is etched with orthogonal two-dimensional metal grids.
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| CN112859313A (en) * | 2021-03-25 | 2021-05-28 | 航天科工微电子系统研究院有限公司 | Off-axis reflection type emission imaging common-aperture optical system and method |
| CN115616561B (en) * | 2022-12-06 | 2023-03-10 | 北京航空航天大学 | Multisource integrated detection method based on optical SAR common-aperture integration |
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| US4371946A (en) * | 1980-10-09 | 1983-02-01 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Servomechanism for doppler shift compensation in optical correlator for synthetic aperture radar |
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| CN110632597A (en) * | 2019-10-14 | 2019-12-31 | 南京航空航天大学 | Microwave photon inverse synthetic aperture radar imaging method and device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US8253620B2 (en) * | 2009-07-23 | 2012-08-28 | Northrop Grumman Systems Corporation | Synthesized aperture three-dimensional radar imaging |
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| US4371946A (en) * | 1980-10-09 | 1983-02-01 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Servomechanism for doppler shift compensation in optical correlator for synthetic aperture radar |
| CN104502909A (en) * | 2014-12-19 | 2015-04-08 | 中国科学院长春光学精密机械与物理研究所 | Composite detection system with optics and millimeter-wave radar sharing aperture |
| CN110632597A (en) * | 2019-10-14 | 2019-12-31 | 南京航空航天大学 | Microwave photon inverse synthetic aperture radar imaging method and device |
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