CN104765128B - Environment defocusing self-adaptation compensation method for airborne laser communication system - Google Patents
Environment defocusing self-adaptation compensation method for airborne laser communication system Download PDFInfo
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- CN104765128B CN104765128B CN201510188352.9A CN201510188352A CN104765128B CN 104765128 B CN104765128 B CN 104765128B CN 201510188352 A CN201510188352 A CN 201510188352A CN 104765128 B CN104765128 B CN 104765128B
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/28—Systems for automatic generation of focusing signals
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound lenses
- G02B3/12—Fluid-filled or evacuated lenses
- G02B3/14—Fluid-filled or evacuated lenses of variable focal length
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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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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
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- Optical Communication System (AREA)
Abstract
The invention relates to an environment defocusing self-adaptation compensation method for an airborne laser communication system, and belongs to the field of space laser communication. An optical antenna is used for shrinking a laser bundle of the airborne laser communication system; after passing through a liquid lens, the laser bundle is focused on an image detector through a defocusing detection optical module, and the image detector interprets the diameter of laser spots and transmits the diameter information of the laser spots to a system controller; the system controller obtains the environment defocusing amount of the laser communication optical system through calculation, then obtains the needed compensation amount of the liquid lens, converts the compensation amount of the liquid lens into an electric control signal and transmits the electric control signal to the liquid lens, and the liquid lens receives the electric control signal, changes the curvature radius and then changes the focal length to perform defocusing self-adaptation compensation. Compared with the prior art, the system controller is used for controlling the liquid lens to perform dynamic environment defocusing compensation without moving any optical components, response speed is high, and the structure is easy to lighten and miniaturize.
Description
Technical field
The invention belongs to laser space communication field, particularly relate to a kind of airborne laser communication system environment from
Burnt self-adapting compensation method.
Background technology
For the laser communication terminal of airborne platform, the sky that material breathing that temperature causes, air pressure cause
Air tightness change, the aero-optical effect that causes of high-speed flight, all will cause in communication terminal optical system from
Burnt.At document " impact of Pneumatic optical and compensation in airborne laser communication " and " The aero optics
Effect near space laser communication optical system " in mention, can adopt
The out of focus caused temperature or boundary-layer by fixing optical frames group compensates.But the method is only to a certain magnitude
Out of focus compensate, it is impossible to the out of focus comprehensively caused other environment such as air pressure, aero-optical effect is entered
The dynamic compensation that row is real-time.Application No. 201210445099.7, entitled " based on prism wedge compensation light
Learn the device of focal plane " patent, use the movement of prism and battery of lens as actuator, out of focus to be carried out
Compensate, but the actuator volume of this method is big, structure is complicated, and response speed is slower.Also have at present
A kind of passing method, the relative position i.e. controlled between mobile detector and optical system carries out defocusing compensation,
But the method structure is complicated, precision is wayward.A kind of airborne laser communication system environment of design is needed for this
Out of focus self-adapting compensation method, the optical system out of focus that can cause various environmental factorss carries out comprehensive dynamic
Compensate, improve communication system response speed, beneficially structure small light.
Summary of the invention
Present invention aim to overcome that the deficiencies in the prior art, it is provided that a kind of fast response time, can dynamically mend
Repay the airborne laser communication system environment out of focus self-adapting compensation method of various environment out of focus.
The technical solution adopted for the present invention to solve the technical problems is: a kind of airborne laser communication of the present invention
System environments out of focus self-adapting compensation method, comprises the following steps,
Step one, utilize optical antenna the laser beam of airborne laser communication system is carried out contracting bundle, contracting bundle after
Laser beam enter the liquid lens that arranges along optical axis direction of optical antenna rear portion, liquid lens passes through automatically controlled
Signal controls, and changes focal length continuously；
Step 2, laser beam are after liquid lens, through the first light splitting piece light splitting, a road laser beam by
Out of focus detection optical module converges on image detector, and a road laser beam enters to be received and dispatched in sub-optical system
The second light splitting piece, image detector interpretation laser spot diameter, and laser spot diameter information is passed to
System controller；
Step 3, system controller, according to laser spot diameter, calculate laser communication system environment out of focus
Amount, and then obtain the compensation dosage needing liquid lens, and the compensation dosage of liquid lens is converted into automatically controlled signal,
Pass to liquid lens, after liquid lens receives automatically controlled signal, change radius of curvature, and then change focal length pair
Out of focus adaptive equalization；
Communication transmitter unit, communications reception it is provided with in the sub-optical system of transmitting-receiving described in step 4, step 2
Unit, beacon emissions unit, beacon reception unit, communication transmitter unit is used for communication laser beam emissions,
Communications reception unit is used for communication laser beam reception, and beacon emissions unit is used for beacon laser beam emissions,
Beacon reception unit is used for beacon laser beam reception, communication laser beam emissions and reception, beacon laser light
Bundle is launched and receives all by liquid lens, and shared optical antenna.
Described out of focus detection optical module and image detector are positioned in the sub-optical system of transmitting-receiving, are arranged at sharp
In a light light beam way light path after light splitting.
Described out of focus detection optical module and image detector are positioned in the sub-optical system of transmitting-receiving, are arranged at sharp
Light light beam beacon after the first light splitting piece light splitting is followed the tracks of in sub-light path, and image detector uses beacon reception list
Beacon tracking detector in unit
Described image detector uses CCD or cmos detector.
The invention has the beneficial effects as follows:
1. the present invention utilizes liquid lens as defocusing compensation actuator, it is not necessary to mobile any optics,
Not only fast response time, low in energy consumption, and structure is also easy to realize small light, it is suitable for airborne platform etc. right
Terminal volume and power consumption have the application being relatively strict with；
2. achieve environment out of focus adaptive equalization, liquid lens, out of focus detection optical module, image detection
Device, system controller, liquid lens are sequentially connected with, and form a closed loop, and whole defocusing compensation process is one
The adaptive equalization process of individual closed loop, is suitable for complex dynamic environment change；
3. liquid lens is controlled by automatically controlled signal, changes focal length continuously, and the accumulation of error is few, therefore compensates essence
Spend high and easily controllable.
Accompanying drawing explanation
Fig. 1 is the principle schematic of airborne laser communication system environment out of focus self-adapting compensation method of the present invention；
Fig. 2 is the out of focus detection optics of airborne laser communication system environment out of focus self-adapting compensation method of the present invention
Module is positioned at principle schematic when receiving and dispatching in sub-optical system.
Detailed description of the invention
The invention will be further described with embodiment below in conjunction with the accompanying drawings.
From Fig. 1-Fig. 2, a kind of airborne laser communication system environment out of focus adaptive equalization side of the present invention
Method, comprises the following steps,
Step one, utilize optical antenna 1 laser beam of airborne laser communication system is carried out contracting bundle, contracting bundle
After laser beam enter the liquid lens 2 that arranges along optical axis direction of optical antenna 1 rear portion, liquid lens 2 is logical
Cross automatically controlled signal to control, change focal length continuously；
Step 2, laser beam are after liquid lens 2, through the first light splitting piece 6 light splitting, a road laser light
Restrainting and converged on image detector 4 by out of focus detection optical module 3, a road laser beam enters receives and dispatches sub-light
The second light splitting piece 8 in system 7, image detector 4 interpretation laser spot diameter, and laser facula is straight
Footpath information passes to system controller 5；
Step 3, system controller 5 according to laser spot diameter, calculate laser communication system environment from
Jiao Liang, and then obtain the compensation dosage needing liquid lens 2, and the compensation dosage of liquid lens 2 is converted into electricity
Control signal, passes to liquid lens 2, after liquid lens 2 receives automatically controlled signal, changes radius of curvature, and then
Change focal length to out of focus adaptive equalization；
Be provided with communication transmitter unit 9 in the sub-optical system of transmitting-receiving 7 described in step 4, step 2, communication connects
Receiving unit 10, beacon emissions unit 13, beacon reception unit 14, communication transmitter unit 9 is for communication laser
Beam emissions, communications reception unit 10 is for communication laser beam reception, and beacon emissions unit 13 is used for believing
Mark laser beam is launched, and beacon reception unit 14 is for beacon laser beam reception, communication laser beam emissions
With reception, beacon laser beam emissions with reception all by liquid lens 2, and shared optical antenna 1.
Described out of focus detection optical module 3 and image detector 4 are positioned in the sub-optical system 7 of transmitting-receiving, if
It is placed in a laser beam way light path after light splitting.
Described out of focus detection optical module 3 and image detector 4 are positioned in the sub-optical system 7 of transmitting-receiving, if
Being placed in laser beam beacon after the first light splitting piece 6 light splitting to follow the tracks of in sub-light path, image detector 4 uses
Beacon tracking detector in beacon reception unit 14
Described image detector 4 uses CCD or cmos detector.
When the working environment of airborne platform, such as temperature, air pressure, aero-optical effect etc. change, can cause logical
Communication system environment out of focus, now out of focus detection optical module 3 converges to the laser facula on image detector 4
Disperse will occur, and laser spot diameter can change, and image detector 4 is by laser spot diameter information
Passing to system controller 5, system controller 5 can calculate laser lead to according to laser spot diameter information
Letter optical system environment defocusing amount, and then obtain the compensation dosage needing liquid lens 2, compensation dosage is with automatically controlled letter
Number form pass to liquid lens 2, liquid lens 2 changes focal length and compensates environment out of focus, in turn
Affecting laser spot diameter, laser spot diameter information is then passed to system controller 5 by image detector 4,
The most whole process constitutes the adaptive equalization process of a closed loop.Communication laser beam emissions and reception, letter
Mark laser beam is launched and receives all by liquid lens 2, and shared optical antenna 1, due to liquid lens pair
The calibration result of higher order aberratons is good, therefore, it is possible to effectively improve the laser signal resolution of system, Jin Erti
High compensation precision.
As it is shown in figure 1, the sub-optical system of transmitting-receiving 7 for typical space laser communication includes that list is launched in communication
Unit 9, communications reception unit 10, beacon emissions unit 13, beacon reception unit the 14, second light splitting piece 8,
3rd light splitting piece 11 and the 4th light splitting piece 12.Wherein communication transmitter unit 9 and communications reception unit 10 are respectively
It is positioned in two points of photonic light circuit of the 3rd light splitting piece 11；Beacon emissions unit 13 and beacon reception unit 14
Lay respectively in two points of photonic light circuit of the 4th light splitting piece 12；3rd light splitting piece 11 and the 4th light splitting piece 12
Lay respectively at again in two points of photonic light circuit of the second light splitting piece 8.Laser communication is carried out at two communication terminals
Whole during, first terminal carries out the transmitting of beacon laser light beam and receives the beacon laser light of the other side simultaneously
Bundle, for guiding position each other.In the case of accurately determining the other side position and ensureing tenacious tracking, logical
Letter terminal transmission communication laser light beam, receives the communication laser light beam of the other side simultaneously, carries out duplex communication.Letter
The transmitting of the mark transmitter unit 13 beacon laser light beam in whole communication process, beacon reception unit 14
Reception for beacon laser light beam detects, and communication transmitter unit 9 is for communication laser beam emissions, communication
Receive unit 10 for communication laser beam reception.
Out of focus detection optical module 3 and image detector 4 can be single modules, as it is shown in figure 1,
Can also be placed in the sub-optical system 7 of transmitting-receiving, as in figure 2 it is shown, out of focus detection optical module 3 is positioned at transmitting-receiving
In sub-optical system 7, receive and dispatch sub-optical system 7 and comprise the sub-light path much with not same-action, such as the 4th
The sub-light path of beacon emissions after light splitting piece 12 light splitting and the beacon light path of tracking, and beacon emissions unit 13
In the sub-light path of beacon emissions, beacon reception unit 14 is positioned at beacon and follows the tracks of in sub-light path, and beacon follows the tracks of sub-light
Lu Zhong, as preferably, out of focus detection optical module 3 and image detector 4 can be arranged at laser beam warp
Beacon after light splitting is followed the tracks of in sub-light path, now uses the beacon tracking detector in beacon reception unit 14 to make
For image detector 4, such beacon is followed the tracks of sub-light path and is being recorded laser facula miss distance, realize beacon
While detection, can interpretation laser spot diameter, it is achieved the detection of defocusing amount, the two is taken into account so that system
Overall structure simplifies, and the sub-light path of beacon tracking simultaneously is compared with other the sub-light paths receiving and dispatching sub-optical system 7,
Often focal length is longer, therefore more sensitive to out of focus change, it is achieved the sensitivity of defocusing amount detection is higher.
Claims (4)
1. an airborne laser communication system environment out of focus self-adapting compensation method, its feature is as follows: include with
Lower step,
Step one, utilize optical antenna (1) laser beam of airborne laser communication system is carried out contracting bundle, contracting
Laser beam after bundle enters the liquid lens (2) that optical antenna (1) rear portion is arranged, liquid along optical axis direction
Lens (2) are controlled by automatically controlled signal, change focal length continuously；
Step 2, laser beam are after liquid lens (2), through the first light splitting piece (6) light splitting, a road
Laser beam is detected optical module (3) by out of focus and converges on image detector (4), a road laser beam
Enter the second light splitting piece (8) received and dispatched in sub-optical system (7), image detector (4) interpretation laser light
Spot diameter, and laser spot diameter information is passed to system controller (5)；
Step 3, system controller (5), according to laser spot diameter, calculate laser communication system environment
Defocusing amount, and then obtain the compensation dosage needing liquid lens (2), and by the compensation dosage of liquid lens (2)
It is converted into automatically controlled signal, passes to liquid lens (2), after liquid lens (2) receives automatically controlled signal, change
Radius of curvature, and then change focal length to out of focus adaptive equalization；
Be provided with in the sub-optical system of transmitting-receiving (7) described in step 4, step 2 communication transmitter unit (9),
Communications reception unit (10), beacon emissions unit (13), beacon reception unit (14), communicate transmitter unit
(9) for communication laser beam emissions, communications reception unit (10) is used for communication laser beam reception, letter
Mark transmitter unit (13) is used for beacon laser for beacon laser beam emissions, beacon reception unit (14)
Beam reception, communication laser beam emissions is all saturating by liquid with reception, beacon laser beam emissions and reception
Mirror (2), and shared optical antenna (1).
Airborne laser communication system environment out of focus self-adapting compensation method the most according to claim 1, its
It is characterised by: described out of focus detection optical module (3) and image detector (4) are positioned at the sub-optics of transmitting-receiving
In system (7), it is arranged in a laser beam way light path after light splitting.
Airborne laser communication system environment out of focus self-adapting compensation method the most according to claim 1, its
It is characterised by: described out of focus detection optical module (3) and image detector (4) are positioned at the sub-optics of transmitting-receiving
In system (7), it is arranged at laser beam beacon after the first light splitting piece (6) light splitting and follows the tracks of in sub-light path,
Image detector (4) uses the beacon tracking detector in beacon reception unit (14).
4. according to the airborne laser communication system environment out of focus self-adapting compensation method described in claim 1 or 3,
It is characterized in that: described image detector (4) uses CCD or cmos detector.
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| CN201510188352.9A CN104765128B (en) | 2015-04-21 | 2015-04-21 | Environment defocusing self-adaptation compensation method for airborne laser communication system |
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| CN201510188352.9A CN104765128B (en) | 2015-04-21 | 2015-04-21 | Environment defocusing self-adaptation compensation method for airborne laser communication system |
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| CN104765128B true CN104765128B (en) | 2017-01-11 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105068197A (en) * | 2015-09-08 | 2015-11-18 | 长春理工大学 | Compact light splitting module for free space laser communication |
| CN106788763B (en) * | 2016-12-28 | 2023-09-29 | 辽宁工业大学 | Airborne laser communication device and control method thereof |
| US10768404B2 (en) | 2017-03-22 | 2020-09-08 | Mitutoyo Corporation | Modulation monitoring system for use with an imaging system that includes a high speed periodically modulated variable focal length lens |
| CN106802462A (en) * | 2017-03-24 | 2017-06-06 | 中国电子科技集团公司第三十四研究所 | The radio antenna double lens reception device of the automatic heat that disappears |
| CN108833022B (en) * | 2018-04-24 | 2020-01-03 | 长春理工大学 | Sea wave height self-adaptive underwater communication system with communication and ranging shared optical system |
| CN109597214A (en) * | 2018-12-29 | 2019-04-09 | 深圳航星光网空间技术有限公司 | The system for drawing optical antenna outgoing beam optical axis |
| CN110365409B (en) * | 2019-08-15 | 2024-01-30 | 长春理工大学 | Vehicle-mounted compact type laser communication integrated optical base station |
| CN114450587A (en) * | 2019-10-16 | 2022-05-06 | 株式会社岛津制作所 | Imaging quality analysis device |
| CN112398533B (en) * | 2020-11-04 | 2023-06-27 | 中国科学院半导体研究所 | Rapid focusing, transmitting and receiving integrated antenna and rapid focusing method |
| CN112578573B (en) * | 2021-02-24 | 2021-07-02 | 北京中创为南京量子通信技术有限公司 | Portable free space quantum communication optical axis calibration system |
| CN113612534B (en) * | 2021-07-01 | 2022-05-20 | 中国科学院西安光学精密机械研究所 | Optical system of miniaturized space laser communication terminal and using method |
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| US7587141B2 (en) * | 2005-08-02 | 2009-09-08 | Itt Manufacturing Enterprises, Inc. | Communication transceiver architecture |
| KR100847804B1 (en) * | 2005-11-15 | 2008-08-06 | (주) 비앤피 사이언스 | Liquid lens and a method for producing the same |
| CN102223177B (en) * | 2011-06-21 | 2014-10-15 | 中国科学院上海技术物理研究所 | Ultra-long distance optical communication system and ultra-long distance optical communication method based on single-photon detection |
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