CN111970054B - View field spliced wide-area rapid capturing laser communication terminal - Google Patents
View field spliced wide-area rapid capturing laser communication terminal Download PDFInfo
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- CN111970054B CN111970054B CN202010959021.1A CN202010959021A CN111970054B CN 111970054 B CN111970054 B CN 111970054B CN 202010959021 A CN202010959021 A CN 202010959021A CN 111970054 B CN111970054 B CN 111970054B
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- capturing
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- tracking
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
- H04N23/55—Optical parts specially adapted for electronic image sensors; Mounting thereof
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/698—Control of cameras or camera modules for achieving an enlarged field of view, e.g. panoramic image capture
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/90—Arrangement of cameras or camera modules, e.g. multiple cameras in TV studios or sports stadiums
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Computer Networks & Wireless Communication (AREA)
- Optical Communication System (AREA)
Abstract
A visual field spliced wide-area rapid capturing laser communication terminal belongs to the technical field of space laser communication and aims to solve the problems existing in the prior art, and the visual field spliced wide-area rapid capturing laser communication terminal comprises a capturing and coarse tracking branch, a fine tracking branch, a beacon transmitting branch, a communication receiving branch and a fixed bracket; the capturing and coarse tracking branch comprises a capturing and coarse tracking unit I, a capturing and coarse tracking unit II, a capturing and coarse tracking unit III and a capturing and coarse tracking unit IV, and the four capturing and coarse tracking units are distributed in a shape of a Chinese character 'tian' to form a large spliced view field and are arranged on the fixed bracket; the optical axes of the fine tracking branch, the beacon transmitting branch and the communication receiving branch are arranged in parallel; the center of the large spliced visual field is coaxial with the communication receiving branch; the fine tracking branch, the beacon transmitting branch and the communication receiving branch are arranged on the fixed support, and the optical axes of the three branches are vertical to the surface of the fixed support. The rapid scanning and capturing of the target are realized, and the working conditions of space laser communication all day can be better met.
Description
Technical Field
The invention relates to a field-of-view spliced wide-area rapid capturing laser communication terminal system, and belongs to the technical field of space laser communication.
Background
The space laser communication has the advantages of large communication capacity, high transmission rate, good confidentiality and strong anti-interference capability, and is widely applied to the fields of military, aviation, aerospace and the like.
For the traditional space laser communication terminal, the two communication terminals need to accurately know the position information of the two parties, the two parties generally inform the other parties through a wireless data transmission mode, and the wireless data transmission has the defects of poor confidentiality and weak anti-interference capability, so that in a specific occasion, the own position information can not be transmitted to the other parties through the wireless data transmission mode due to confidentiality consideration, the capture uncertainty area of the other party system is increased, and the capture difficulty is increased. The mode of adopting a large-view-field single-capture lens in the traditional space laser communication can lead to the increase of the angular resolution of a capture system and influence the coarse tracking precision of the system; on the other hand, the increased field of view may result in a reduced ability of the capture system to suppress sky backlight, failing to operate under all day conditions.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a view field spliced wide-area rapid capturing laser communication terminal, which adopts a plurality of small view field capturing lenses to splice view fields, increases the view field of a capturing system on the premise of not increasing the angular resolution of the system, reduces the capturing time of the system, and achieves the purpose of rapidly capturing a wide-area target with uncertain specific positions.
The technical scheme of the invention is as follows:
the field-of-view spliced wide-area rapid capturing laser communication terminal is characterized by comprising a capturing and coarse tracking branch, a fine tracking branch, a beacon transmitting branch, a communication receiving branch and a fixed bracket; the capturing and coarse tracking branch comprises a capturing and coarse tracking unit I, a capturing and coarse tracking unit II, a capturing and coarse tracking unit III and a capturing and coarse tracking unit IV, and the four capturing and coarse tracking units are distributed in a shape of a Chinese character 'tian' to form a large spliced view field and are arranged on the fixed bracket; the optical axes of the fine tracking branch, the beacon transmitting branch and the communication receiving branch are arranged in parallel; the center of the large spliced visual field is coaxial with the communication receiving branch; the fine tracking branch, the beacon transmitting branch and the communication receiving branch are arranged on the fixed support, and the optical axes of the three branches are vertical to the surface of the fixed support.
Each capturing and coarse tracking unit is composed of a capturing and coarse tracking lens and a coarse tracking camera.
Four capturing and coarse tracking lenses in the capturing and coarse tracking branches are mounted on the fixed support, the overlapping angle of the splicing areas of two adjacent capturing and coarse tracking lenses is 0.5-1.5 degrees, and the single capturing and coarse tracking lens has a field of view of 2-5 degrees, so that a large spliced field of view is formed.
The narrow-band filters are arranged in front of the lenses of the capturing and coarse tracking branch, the fine tracking branch and the communication receiving branch, and the bandpass ranges of the narrow-band filters of the capturing and coarse tracking branch and the fine tracking branch are consistent with the wavelength of the target beacon light; the narrowband filter bandpass range of the communication receiving branch is consistent with the wavelength of the target transmission communication light.
The invention has the beneficial effects that: the invention adopts a mode of splicing field of view, and utilizes four small field of view capturing lenses to splice to form a large spliced field of view, thereby improving the coarse tracking precision of the system, reducing the angular resolution of the capturing system and improving the inhibiting capability of the capturing system on sky background light. The four small-view-field capturing lenses are matched with the four sets of receiving cameras, and images received by the receiving cameras are spliced through the splicing software module, so that large-view-field capturing is realized.
The invention increases the capture view field of the capture system, realizes rapid scanning and capture of the target, can reduce the system angular resolution and reduce the influence of sky background light on the capture system by view field splicing, and can better meet the working conditions of space laser communication all day.
Drawings
FIG. 1 is a schematic view of a wide area rapid capture laser communication terminal with field of view stitching according to the present invention;
FIG. 2 is a schematic view of a view-field-spliced capturing and coarse tracking branch according to the present invention;
FIG. 3 is a schematic diagram of a capture and coarse tracking unit according to the present invention;
FIG. 4 is a schematic diagram of a fine tracking branch according to the present invention;
fig. 5 is a schematic diagram of a beacon transmission branch according to the present invention;
fig. 6 is a schematic diagram of a communication receiving branch according to the present invention.
1. The system comprises a capturing and coarse tracking branch circuit, a fine tracking branch circuit, a beacon transmitting branch circuit, a communication receiving branch circuit, a fixed support, a capturing lens I, a capturing lens II, a capturing lens 13, a capturing lens III, a capturing lens 14 and a capturing lens IV. 11-1, capturing and coarse tracking lenses, 11-2, a coarse tracking camera, a fine tracking lens 21, a fine tracking camera 22, a beacon laser 31, a beacon transmitting lens 32, cassegrain units 41, 42, focusing lenses 43, and a receiving detector.
Detailed Description
The present invention is described in further detail below with reference to the accompanying drawings.
As shown in fig. 1, a field-of-view splice type wide area rapid capture laser communication terminal includes a capture and coarse tracking branch 1, a fine tracking branch 2, a beacon transmitting branch 3, a communication receiving branch 4, and a fixed bracket 5.
The capturing and coarse tracking branch 1 comprises a first capturing and coarse tracking unit 11, a second capturing and coarse tracking unit 12, a third capturing and coarse tracking unit 13 and a fourth capturing and coarse tracking unit 14, and the four capturing and coarse tracking units are distributed in a shape of a Chinese character 'tian', as shown in fig. 2. Each of the capturing and coarse tracking units is composed of a capturing and coarse tracking lens 11-1 and a coarse tracking camera 11-2, as shown in fig. 3.
The optical axes of the fine tracking branch 2, the beacon transmitting branch 3 and the communication receiving branch 4 are arranged in parallel.
Four capturing lenses in the capturing and coarse tracking branch 1 are mounted on the fixed support 5, the overlapping angle of the splicing areas of two adjacent capturing lenses is 0.5-1.5 degrees, the visual fields of the single capturing lenses are 2-5 degrees, a large splicing visual field is formed jointly, and the center of the splicing visual field is coaxial with the communication receiving branch 4 as shown in fig. 3. The fine tracking branch 2, the beacon transmitting branch 3 and the communication receiving branch 4 are arranged on the fixed support 5, and the optical axes of the three branches are vertical to the surface of the fixed support 5.
The narrow-band filters are arranged in front of the receiving lenses of the capturing and coarse tracking branch 1, the fine tracking branch 2 and the communication receiving branch 4, and the bandpass ranges of the narrow-band filters of the capturing and coarse tracking branch 1 and the fine tracking branch 2 are consistent with the wavelength of the target beacon light. The narrowband filter bandpass range of the communication receiving branch 4 is consistent with the target transmitted communication light wavelength.
The fine tracking branch 2 comprises a fine tracking lens 21 and a fine tracking camera 22, wherein the fine tracking lens 21 and the fine tracking camera 22 are connected through threads and are coaxially arranged as shown in fig. 4.
The beacon transmission branch 3 includes a beacon laser 31 and a beacon transmission lens 32, and the beacon laser 31 is connected to the beacon transmission lens 32 through an optical fiber and outputs beacon light as shown in fig. 5.
The communication receiving branch 4 includes a cassegrain unit 41, a focusing lens 42, and a receiving detector 43, and the communication light received by the cassegrain unit 41 is converged to the receiving detector 43 through the focusing lens 42 for communication light reception, as shown in fig. 6.
The working process of the visual field spliced wide-area rapid capturing laser communication terminal is as follows:
the target emits beacon light to the terminal, the terminal performs rapid scanning and capturing on the target in an oversized capture uncertain region, after the terminal captures the beacon light emitted by the target and is captured by the coarse tracking branch 1, the beacon light received by the capture and coarse tracking lens 11-1 is transmitted to the coarse tracking camera 11-2 to complete coarse tracking, then the beacon light emitted by the target is received in the field of view of the fine tracking branch 2 and is transmitted to the fine tracking camera 22 by the fine tracking lens 21 to complete fine tracking, then the laser 31 in the beacon emitting branch 3 transmits the output beacon light to the target by the beacon transmitting lens 32, after the target receives the beacon light emitted by the beacon emitting branch 3 and stably tracks, communication light is emitted to the terminal, and after the target receives the beacon light by the Cassegrain unit 41 in the communication receiving branch 4, the communication light is converged and transmitted to the receiving detector 43 by the focusing lens 42, and the receiving detector 43 demodulates the communication light, and the two parties complete communication.
Claims (3)
1. The field-of-view spliced wide-area rapid capturing laser communication terminal is characterized by comprising a capturing and coarse tracking branch (1), a fine tracking branch (2), a beacon transmitting branch (3), a communication receiving branch (4) and a fixed bracket (5);
the capturing and coarse tracking branch circuit (1) comprises a first capturing and coarse tracking unit (11), a second capturing and coarse tracking unit (12), a third capturing and coarse tracking unit (13) and a fourth capturing and coarse tracking unit (14), wherein the four capturing and coarse tracking units are distributed in a 'field' shape to form a large spliced view field and are arranged on the fixed support (5);
four capturing and coarse tracking lenses in the capturing and coarse tracking branch (1) are arranged on the fixed support (5), the overlapping angle of the splicing areas of two adjacent capturing and coarse tracking lenses is 0.5-1.5 degrees, and the field of view of a single capturing and coarse tracking lens is 2-5 degrees, so that a large spliced field of view is formed together;
the optical axes of the fine tracking branch circuit (2), the beacon transmitting branch circuit (3) and the communication receiving branch circuit (4) are arranged in parallel;
the center of the large spliced visual field is coaxial with the communication receiving branch (4);
the fine tracking branch circuit (2), the beacon transmitting branch circuit (3) and the communication receiving branch circuit (4) are arranged on the fixed support (5), and the optical axes of the three branch circuits are kept perpendicular to the surface of the fixed support (5).
2. The field-of-view tiled wide-area fast-acquisition laser communication terminal according to claim 1, wherein each acquisition and coarse tracking unit is comprised of an acquisition and coarse tracking lens and a coarse tracking camera.
3. The view splice type wide area rapid capturing laser communication terminal according to claim 1, wherein narrow band filters are arranged in front of lenses of the capturing and coarse tracking branch (1), the fine tracking branch (2) and the communication receiving branch (4), and the bandpass ranges of the narrow band filters of the capturing and coarse tracking branch (1) and the fine tracking branch (2) are consistent with the wavelength of a target beacon; the narrowband filter bandpass range of the communication receiving branch (4) is consistent with the wavelength of the target transmission communication light.
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| CN202010959021.1A CN111970054B (en) | 2020-09-14 | 2020-09-14 | View field spliced wide-area rapid capturing laser communication terminal |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010959021.1A CN111970054B (en) | 2020-09-14 | 2020-09-14 | View field spliced wide-area rapid capturing laser communication terminal |
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| CN111970054A CN111970054A (en) | 2020-11-20 |
| CN111970054B true CN111970054B (en) | 2023-07-21 |
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| CN114710207B (en) * | 2022-03-29 | 2023-10-27 | 长春理工大学 | Wavelength self-adaptive matching terminal, system and method applied to multi-wavelength free matching laser communication |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110966937A (en) * | 2019-12-18 | 2020-04-07 | 哈尔滨工业大学 | Large member three-dimensional configuration splicing method based on laser vision sensing |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101227235B (en) * | 2008-01-22 | 2010-06-02 | 长春理工大学 | Capture analog device of airborne laser communication system |
| CN101630970B (en) * | 2009-08-14 | 2012-07-18 | 中国科学院上海光学精密机械研究所 | Satellite laser communication compound axis light tracking device and control method thereof |
| CN104296754B (en) * | 2014-10-10 | 2017-09-19 | 北京大学 | Autonomous navigation system and its autonomous navigation method based on laser space communication terminal |
| CN109672878A (en) * | 2017-10-13 | 2019-04-23 | 康耐视公司 | To the field calibration system and method for the vision system of calibration object two opposite sides imaging |
| US10193627B1 (en) * | 2018-05-31 | 2019-01-29 | Ford Global Technologies, Llc | Detection of visible light communication sources over a high dynamic range |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110966937A (en) * | 2019-12-18 | 2020-04-07 | 哈尔滨工业大学 | Large member three-dimensional configuration splicing method based on laser vision sensing |
Non-Patent Citations (1)
| Title |
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| Qing-Zhong Li等.Fast multicamera video stitching for underwater wide field-of-view observation.《Journal of Electronic Imaging》.2014,全文. * |
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