CN104765128A - 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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- CN104765128A CN104765128A CN201510188352.9A CN201510188352A CN104765128A CN 104765128 A CN104765128 A CN 104765128A CN 201510188352 A CN201510188352 A CN 201510188352A CN 104765128 A CN104765128 A CN 104765128A
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- liquid lens
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- laser beam
- beacon
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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
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 out of focus self-adapting compensation method.
Background technology
For the laser communication terminal of airborne platform, the aero-optical effect that the air density change that the material breathing that temperature causes, air pressure cause, high-speed flight cause, all will cause optical system out of focus in communication terminal.Mention in document " in airborne laser communication the impact of Pneumatic optical and compensation " and " The aero opticseffect near space laser communication optical system ", fixed optics mirror group can be adopted to compensate the out of focus that temperature or boundary-layer cause.But the method only compensates the out of focus of a certain magnitude, comprehensively real-time dynamic compensation can not be carried out to the out of focus that other environment such as air pressure, aero-optical effect cause.Application number is 201210445099.7, name is called the patent of " device based on prism wedge compensate for optical focal plane ", adopt the movement of prism and lens combination to compensate out of focus as topworks, but topworks's volume of this method is large, complex structure, and response speed is slower.Also have a kind of passing method at present, namely the relative position controlled between mobile detector and optical system carries out defocusing compensation, but the method complex structure, precision are wayward.Need to design a kind of airborne laser communication system environment out of focus self-adapting compensation method, the optical system out of focus that can cause various environmental factor carries out comprehensive dynamic compensating for this reason, improves communication system response speed, is beneficial to structure small light.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, provide a kind of fast response time, can the airborne laser communication system environment out of focus self-adapting compensation method of the various environment out of focus of dynamic compensation.
The technical solution adopted for the present invention to solve the technical problems is: a kind of airborne laser communication system environment out of focus self-adapting compensation method of the present invention, comprises the following steps,
Step one, utilize optical antenna to carry out contracting bundle to the laser beam of airborne laser communication system, the laser beam after contracting bundle enters the liquid lens that optical antenna rear portion arranges along optical axis direction, and liquid lens is controlled by automatically controlled signal, continuously changes focal length;
Step 2, laser beam are after liquid lens, through the first light splitting piece light splitting, one road laser beam detects optical module by out of focus and converges on image detector, one road laser beam enters the second light splitting piece in the sub-optical system of transmitting-receiving, image detector interpretation laser spot diameter, and laser spot diameter information is passed to system controller;
Step 3, system controller are according to laser spot diameter, calculate laser communication system environment defocusing amount, and then obtain the compensation rate needing liquid lens, and the compensation rate 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 to out of focus adaptive equalization;
Communications transmit unit, communications reception unit, beacon emissions unit, beacon reception unit is provided with in the sub-optical system of transmitting-receiving described in step 4, step 2, communications transmit unit is used for communication laser beam emissions, communications reception unit is used for communication laser beam reception, 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 beam emissions and reception all by liquid lens, and share optical antenna.
Described out of focus detection optical module and image detector are arranged in the sub-optical system of transmitting-receiving, are specifically arranged in the way light path of laser beam after light splitting.
Described out of focus detection optical module and image detector are arranged in the sub-optical system of transmitting-receiving, and be specifically arranged at the beacon of laser beam after the first light splitting piece light splitting and follow the tracks of in sub-light path, image detector adopts the beacon tracking detector in beacon reception unit
Described image detector adopts CCD or cmos detector.
The invention has the beneficial effects as follows:
1. the present invention utilizes liquid lens as defocusing compensation topworks, do not need mobile any optics, not only fast response time, low in energy consumption, and structure is also easy to realize small light, being applicable to airborne platform etc. has the application of being comparatively strict with to terminal volume and power consumption;
2. achieve the adaptive equalization of environment out of focus, liquid lens, out of focus detection optical module, image detector, system controller, liquid lens connect successively, form a closed loop, whole defocusing compensation process is the adaptive equalization process of a closed loop, is applicable to complex dynamic environment change;
3. liquid lens is controlled by automatically controlled signal, continuously changes focal length, and the accumulation of error is few, therefore compensation precision high and be easy to control.
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 principle schematic that the out of focus detection optical module of airborne laser communication system environment out of focus self-adapting compensation method of the present invention is arranged in when receiving and dispatching sub-optical system.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described.
From Fig. 1-Fig. 2, a kind of airborne laser communication system environment out of focus self-adapting compensation method of the present invention, comprises the following steps,
Step one, utilize the laser beam of optical antenna 1 pair of airborne laser communication system to carry out contracting bundle, the laser beam after contracting bundle enters the liquid lens 2 that optical antenna 1 rear portion arranges along optical axis direction, and liquid lens 2 is controlled by automatically controlled signal, continuously changes focal length;
Step 2, laser beam are after liquid lens 2, through the first light splitting piece 6 light splitting, one road laser beam detects optical module 3 by out of focus and converges on image detector 4, one road laser beam enters the second light splitting piece 8 in the sub-optical system 7 of transmitting-receiving, image detector 4 interpretation laser spot diameter, and laser spot diameter information is passed to system controller 5;
Step 3, system controller 5 are according to laser spot diameter, calculate laser communication system environment defocusing amount, and then obtain the compensation rate needing liquid lens 2, and the compensation rate of liquid lens 2 is converted into automatically controlled signal, pass 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;
Communications transmit unit 9, communications reception unit 10, beacon emissions unit 13, beacon reception unit 14 is provided with in the sub-optical system 7 of transmitting-receiving described in step 4, step 2, communications transmit unit 9 is for communication laser beam emissions, communications reception unit 10 is for communication laser beam reception, beacon emissions unit 13 is for beacon laser beam emissions, beacon reception unit 14 is for beacon laser beam reception, communication laser beam emissions and reception, beacon laser beam emissions and reception all by liquid lens 2, and share optical antenna 1.
Described out of focus detection optical module 3 and image detector 4 are arranged in the sub-optical system 7 of transmitting-receiving, are specifically arranged in the way light path of laser beam after light splitting.
Described out of focus detection optical module 3 and image detector 4 are arranged in the sub-optical system 7 of transmitting-receiving, specifically being arranged at the beacon of laser beam after the first light splitting piece 6 light splitting follows the tracks of in sub-light path, and image detector 4 adopts the beacon tracking detector in beacon reception unit 14
Described image detector 4 adopts CCD or cmos detector.
When the working environment of airborne platform, as temperature, air pressure, the changes such as aero-optical effect, communication system environment out of focus can be caused, will disperse be there is in the laser facula that now out of focus detection optical module 3 converges on image detector 4, laser spot diameter can change, laser spot diameter information is passed to system controller 5 by image detector 4, system controller 5 can according to laser spot diameter information, calculate laser communication optical system environment defocusing amount, and then obtain the compensation rate needing liquid lens 2, compensation rate passes to liquid lens 2 with the form of automatically controlled signal, liquid lens 2 changes focal length and compensates environment out of focus, and then affect laser spot diameter again, laser spot diameter information is then passed to system controller 5 by image detector 4, whole process forms the adaptive equalization process of a closed loop thus.Communication laser beam emissions and reception, beacon laser beam emissions and reception are all by liquid lens 2, and share optical antenna 1, because liquid lens is good to the calibration result of higher order aberratons, therefore, it is possible to the laser signal resolution of effective raising system, and then improve compensation precision.
As shown in Figure 1, the sub-optical system 7 of transmitting-receiving for typical space laser communication comprises communications transmit unit 9, communications reception unit 10, beacon emissions unit 13, beacon reception unit 14, second light splitting piece 8, the 3rd light splitting piece 11 and the 4th light splitting piece 12.Wherein communications transmit unit 9 and communications reception unit 10 lay respectively 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.Carry out in the whole process of laser communication at two communication terminals, the transmitting that first terminal carries out beacon laser light beam receives the beacon laser light beam of the other side simultaneously, for guiding position each other.When accurately determining the other side position and ensureing tenacious tracking, communication laser light beam launched by communication terminal, receives the communication laser light beam of the other side simultaneously, carries out duplex communication.Beacon emissions unit 13 is for the transmitting of the beacon laser light beam in whole communication process, beacon reception unit 14 detects for the reception of beacon laser light beam, communications transmit unit 9 is for communication laser beam emissions, and communications reception unit 10 is for communication laser beam reception.
Out of focus detection optical module 3 and image detector 4 can be independent modules, as shown in Figure 1, also the sub-optical system 7 of transmitting-receiving can be placed in, as shown in Figure 2, out of focus detection optical module 3 is arranged in the sub-optical system 7 of transmitting-receiving, receive and dispatch sub-optical system 7 and comprise the sub-light path much with not same-action, as the sub-light path of beacon emissions after the 4th light splitting piece 12 light splitting and beacon follow the tracks of sub-light path, and beacon emissions unit 13 is arranged in the sub-light path of beacon emissions, beacon reception unit 14 is arranged in beacon and follows the tracks of sub-light path, beacon is followed the tracks of in sub-light path, as preferably, out of focus detection optical module 3 and image detector 4 can be arranged at the beacon of laser beam after light splitting and follow the tracks of in sub-light path, beacon tracking detector now in employing beacon reception unit 14 is as image detector 4, such beacon is followed the tracks of sub-light path and is being carried out record to laser facula miss distance, while realizing beacon detection, can interpretation laser spot diameter, realize the detection of defocusing amount, the two is taken into account, the structure of overall system is simplified, other sub-light paths that simultaneously beacon is followed the tracks of sub-light path and received and dispatched sub-optical system 7 are compared, often focal length is longer, therefore comparatively responsive to out of focus change, the sensitivity realizing 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: comprise the following steps,
Step one, utilize optical antenna (1) to the laser beam of airborne laser communication system carry out contracting bundle, laser beam after contracting bundle enters the liquid lens (2) that optical antenna (1) rear portion is arranged along optical axis direction, liquid lens (2) is controlled by automatically controlled signal, continuously changes focal length;
Step 2, laser beam are after liquid lens (2), through the first light splitting piece (6) light splitting, one road laser beam detects optical module (3) by out of focus and converges on image detector (4), one road laser beam enters the second light splitting piece (8) in the sub-optical system of transmitting-receiving (7), image detector (4) interpretation laser spot diameter, and laser spot diameter information is passed to system controller (5);
Step 3, system controller (5) are according to laser spot diameter, calculate laser communication system environment defocusing amount, and then obtain the compensation rate needing liquid lens (2), and the compensation rate of liquid lens (2) is converted into automatically controlled signal, pass 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;
Step 4, communications transmit unit (9) is provided with in the sub-optical system of transmitting-receiving described in step 2 (7), communications reception unit (10), beacon emissions unit (13), beacon reception unit (14), communications transmit unit (9) is for communication laser beam emissions, communications reception unit (10) is for communication laser beam reception, beacon emissions unit (13) is for beacon laser beam emissions, beacon reception unit (14) is for beacon laser beam reception, communication laser beam emissions and reception, beacon laser beam emissions and reception are all by liquid lens (2), and share optical antenna (1).
2. airborne laser communication system environment out of focus self-adapting compensation method according to claim 1, it is characterized in that: described out of focus detection optical module (3) and image detector (4) are arranged in the sub-optical system of transmitting-receiving (7), are specifically arranged in the way light path of laser beam after light splitting.
3. airborne laser communication system environment out of focus self-adapting compensation method according to claim 1, it is characterized in that: described out of focus detection optical module (3) and image detector (4) are arranged in the sub-optical system of transmitting-receiving (7), specifically being arranged at the beacon of laser beam after the first light splitting piece (6) light splitting follows the tracks of in sub-light path, and image detector (4) adopts the beacon tracking detector in beacon reception unit (14).
4. the airborne laser communication system environment out of focus self-adapting compensation method according to claim 1 or 3, is characterized in that: described image detector (4) adopts CCD or cmos detector.
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Cited By (11)
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| CN105068197A (en) * | 2015-09-08 | 2015-11-18 | 长春理工大学 | Compact light splitting module for free space laser communication |
| CN106788763A (en) * | 2016-12-28 | 2017-05-31 | 辽宁工业大学 | airborne laser communication equipment and its control method |
| 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 |
| CN108627141A (en) * | 2017-03-22 | 2018-10-09 | 株式会社三丰 | With the modulation monitoring system that imaging system is used together |
| CN108833022A (en) * | 2018-04-24 | 2018-11-16 | 长春理工大学 | The adaptive underwater communications system of the optical system shared wave heights of communication distance measuring |
| 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 |
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| CN112398533A (en) * | 2020-11-04 | 2021-02-23 | 中国科学院半导体研究所 | Rapid focusing transmitting-receiving integrated antenna and rapid focusing method |
| CN112578573A (en) * | 2021-02-24 | 2021-03-30 | 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 |
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Cited By (16)
| 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 |
| CN106788763A (en) * | 2016-12-28 | 2017-05-31 | 辽宁工业大学 | airborne laser communication equipment and its control method |
| 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 |
| CN108627141A (en) * | 2017-03-22 | 2018-10-09 | 株式会社三丰 | With the modulation monitoring system that imaging system is used together |
| 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 |
| CN108833022A (en) * | 2018-04-24 | 2018-11-16 | 长春理工大学 | The adaptive underwater communications system of the optical system shared wave heights of communication distance measuring |
| 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 |
| CN110365409A (en) * | 2019-08-15 | 2019-10-22 | 长春理工大学 | A kind of vehicle-mounted compact laser communicating integral optics base station |
| 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 |
| CN112398533A (en) * | 2020-11-04 | 2021-02-23 | 中国科学院半导体研究所 | Rapid focusing transmitting-receiving integrated antenna and rapid focusing method |
| CN112578573A (en) * | 2021-02-24 | 2021-03-30 | 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 |
| CN113612534A (en) * | 2021-07-01 | 2021-11-05 | 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 use method |
| 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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