CN111999875A - Shared bifocal optical antenna system - Google Patents
Shared bifocal optical antenna system Download PDFInfo
- Publication number
- CN111999875A CN111999875A CN202010732675.0A CN202010732675A CN111999875A CN 111999875 A CN111999875 A CN 111999875A CN 202010732675 A CN202010732675 A CN 202010732675A CN 111999875 A CN111999875 A CN 111999875A
- Authority
- CN
- China
- Prior art keywords
- focus
- lens unit
- double
- reflector
- hyperboloid reflector
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B17/00—Systems with reflecting surfaces, with or without refracting elements
- G02B17/08—Catadioptric systems
- G02B17/0864—Catadioptric systems having non-imaging properties
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound lenses
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/08—Mirrors
- G02B5/10—Mirrors with curved faces
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/023—Mountings, adjusting means, or light-tight connections, for optical elements for lenses permitting adjustment
Abstract
The invention discloses a common double-focus optical antenna system, wherein the center of the system is a rotating double-sheet hyperboloid reflector which is provided with an inner focus and an outer focus, the focus positioned in the rotating hyperboloid reflector is the inner focus, and the focus positioned outside the rotating hyperboloid reflector is the outer focus. The multiple groups of converging lens units are distributed outside the rotating hyperboloid reflector, the focus of each group of converging lens units coincides with the inner focus of the double-sheet hyperboloid reflector, namely the focus is shared, and the focus of the diverging lens units coincides with the outer focus of the double-sheet hyperboloid reflector, namely the focus is shared. The converging lens units are respectively positioned at any position of a space spherical surface which takes the inner focal point of the rotating hyperbolic reflector as the spherical center and the focal length of each converging lens unit as the radius, and the control system adjusts the position change of the convex lens units on the respective space spherical surfaces. The divergent lens unit is located below the two-sheet hyperboloid mirror, and the optical axis of the divergent lens unit coincides with the rotation axis of the two-sheet hyperboloid mirror.
Description
Technical Field
The invention discloses a shared bifocal optical antenna system, and belongs to the technical field of optical remote sensing communication.
Background
With the exponential increase of the information transmission quantity, the demand of users on data transmission capacity is higher and higher in the future. Compared with radio frequency communication, laser communication has more obvious advantages, including fast data transmission, low energy loss, large bandwidth, small communication terminal size, good interference resistance and confidentiality and the like, and shows an unprecedented development situation. The laser communication technology can realize the live broadcast type real-time transmission of hostile situation perception, natural disaster state and the like of a battlefield, so the laser communication technology has great significance from the realization of national defense safety to the service of national civilian life, is an important communication means relating to national strategic safety, and is particularly suitable for communication platforms such as unmanned platforms, airplanes and satellites with limited load capacity and large data transmission capacity.
The current laser communication terminals of all countries can only complete point-to-point communication, and the defects of single communication form and few communication nodes are obvious. The research results of optical antennas supporting a multi-platform node laser communication networking mode are relatively limited, for example, a plurality of one-to-one communication optical transceivers are simply distributed in multiple directions, and a relatively perfect optical antenna application is not available. The related structure has the defects of excessively large overall structure, few communication nodes, large energy loss, difficult structural design and the like, so that the development and application of the laser communication technology are greatly limited.
In order to overcome the shortcomings of the current systems, new optical systems need to be designed to meet various needs in the future.
Disclosure of Invention
The structure of the invention solves the problems that: the antenna device aims to solve the problems that an existing antenna device of one-to-many laser communication equipment is small in view field, large in size, incapable of tracking and capturing and high in cost. The invention provides a common bifocal antenna device which is easy to realize miniaturization and light weight.
The technical solution of the invention is as follows: a common bifocal optical antenna system includes a two-sheet hyperboloid mirror, a diverging lens unit, a converging lens unit, and a control system;
the center is a double-leaf hyperboloid reflector which is provided with an inner focus and an outer focus; the focus in the rotating hyperboloid reflector is an inner focus, and the focus outside the rotating hyperboloid reflector is an outer focus; the multiple groups of converging lens units are distributed on the outer side of the rotating hyperboloid reflector, the focus of each group of converging lens units is coincided with the inner focus of the double-sheet hyperboloid reflector, namely the inner focus is shared, and the focus of the diverging lens units is coincided with the outer focus of the double-sheet hyperboloid reflector, namely the outer focus is shared; the control system consists of a rotating arm, a rotating shaft, an arc-shaped sliding rail and a related control structure; the rotating arm can do circular motion around the rotating shaft, and the convergent lens unit can slide on the arc-shaped sliding rail, so that the convergent lens unit can move in a spherical space with the shared inner focus as the center of a circle and the focal length of the convergent lens unit as the radius;
when multiple beams of parallel signal light are incident to the optical antenna system from different space angles, a control unit of the control system adjusts a converging lens unit which is in an idle state and has the shortest adjustment time to complete pointing capture and tracking on a working target, so that the optical axis direction of the controlled converging lens unit is consistent with the incident direction of the signal light, the parallel signal light is emitted to the inner focus of the double-sheet hyperboloid reflector, then is reflected by the outer surface of the double-sheet hyperboloid reflector, is converged to the outer focus of the double-sheet hyperboloid reflector, and finally is refracted by a diverging lens unit to form emergent signal light parallel to the rotating shaft of the double-sheet hyperboloid.
The divergent lens unit is synthesized by a plurality of optical lenses.
The condensing lens unit employs a plurality of optical lens combination, or a diffractive transmissive optical condensing element.
All optical lenses in the convergent lens unit are positioned at any position of a spherical surface which takes the common inner focus as a spherical center and takes the focal length of each convex lens unit as a radius.
The distance from the inner focus point to the vertex of the double-leaf hyperboloid reflector is 5 mm.
The distance between the inner and outer focal points was 50 mm.
The invention has the beneficial effects that:
the shared bifocal optical antenna system has the advantages of large dynamic tracking range, more communication nodes, easiness in miniaturization and light weight, simple structure, relative easiness in subsequent signal processing and the like. The method can realize stable pointing, capturing, tracking and networking communication among multiple targets.
1. When multiple parallel light beams enter the optical system from any different space angles, the light beams are reflected by different converging lens units and double-sheet hyperboloid reflecting surface light paths of the optical system and then emitted along the direction parallel to the central axis of the double-sheet hyperboloid through the concave lens. And the laser beams emitted in parallel along the main axis can also be emitted in parallel outwards after the optical path of the laser beams is folded by the system. Therefore, the system can simultaneously complete the functions of receiving and transmitting information, and achieve the purpose of information exchange among multiple platforms at the same time.
2. Each convergent lens unit in the lens group 3 moves on a spatial spherical surface, has good maneuvering flexibility, can capture, track and communicate between an azimuth angle of 360 degrees and a larger pitch angle (when the distance from a focus to a vertex in a double-leaf hyperbolic surface is 5mm, the distance from an inner focus to an outer focus is 50mm, and the size of an opening at the lower end is 10mm, the range of the communication pitch angle can reach 98 degrees), and improves the communication quality and the practical range of laser networking communication.
3. The invention uses the double-leaf hyperboloid reflector to avoid the situation that only one inner focus of the revolution paraboloid is difficult to calibrate in the actual assembling and adjusting process. The optical property of the double-sheet hyperboloid enables the reflector to be calibrated by taking whether the reflected light rays converge to a certain point of the central axis as a standard in the calibration process, so that the difficulty degree of focal point calibration is greatly reduced.
4. The main structure adopted by the invention is simpler and more compact, no complex attitude control motor and other systems are arranged in the middle, the miniaturization and the light weight are easy to realize, and the invention has great potential in small communication satellites.
Drawings
FIG. 1 is a schematic diagram of the principal structure of an optical system;
FIG. 2 is a schematic diagram of the operating principle of the optical system;
FIG. 3 is a schematic view of hyperbolic optical principles;
Detailed Description
As shown in fig. 1, a common bifocal optical antenna system is comprised of a rotating two-sheet hyperboloid mirror, a diverging lens unit, a converging lens unit, and a control system. The system structure is as follows: the center is a double-leaf hyperboloid reflector 1, and the double-leaf hyperboloid reflector 1 is provided with an inner focus and an outer focus; the focal point inside the hyperboloid rotating mirror 1 is an inner focal point, and the focal point outside the hyperboloid rotating mirror is an outer focal point. The groups of the convergent lens units 3 are distributed outside the rotating hyperboloid reflector, the focus of each group of the convergent lens units 3 coincides with the inner focus of the double-sheet hyperboloid reflector 1, namely the common inner focus, and the focus of the divergent lens unit 2 coincides with the outer focus of the double-sheet hyperboloid reflector 1, namely the common outer focus. The control system consists of a rotating arm, a rotating shaft, an arc-shaped sliding rail and a related control structure. The rotating arm can do circular motion around the rotating shaft, and the converging lens unit can slide on the sliding rail, so that the converging lens group can move in a spherical space with the shared inner focus as the center of a circle and the focal length of the lens as the radius.
The shared bifocal optical antenna system is arranged on an optical communication platform, so that networking laser communication can be simultaneously carried out among a plurality of platforms.
The principle of the scheme is as follows:
from the optical characteristics of the two-sheet hyperboloid mirror 1, it can be seen that: the two-sheet hyperboloid has the optical property that when an incident ray is directed to its inner focal point, the reflected ray from the outer surface will be directed to its outer focal point. When the focus of the convergent lens unit coincides with the inner focus of the two-sheet hyperboloid mirror, the light beam incident in parallel along the optical axis of the convergent lens unit converges on the outer surface of the two-sheet hyperboloid mirror and then exits in the direction of the outer focus. When the diverging lens unit focal point coincides with the external focal point of the two-sheet hyperboloid mirror, the reflected light rays will exit parallel to the two-sheet hyperboloid rotation axis. The optical principle is as in figure 3.
According to the above-mentioned working mode characteristics of said system and the principle of reversible optical path, when some platform wants to send information to other platform. The platform can utilize a light source system to emit parallel light from signal light along a double-sheet hyperboloid rotating shaft, the light reaches the hyperboloid reflector 1 after being transmitted by the divergent lens unit 2, after being reflected by the hyperboloid reflector 1, the azimuth angle and the pitching angle of the convergent lens unit 3 are controlled by the electromechanical control system to enable the optical axis of the convergent lens unit to be aligned with a target, and then the reflected light is emitted outwards in a parallel orientation mode through the convergent lens unit.
When parallel signal light of a laser communication transmitting platform is emitted to an optical antenna system of another communication receiving platform, the optical antenna of a receiving end adjusts the lens unit to an optimal receiving position by the electromechanical control system according to a related software algorithm, even if the optical axis of the optical antenna is parallel to an incident signal light beam, the signal light passing through the lens unit follows the optical characteristic of the double-sheet hyperboloid and is emitted to a subsequent optical receiving system in parallel to the rotating shaft of the double-sheet hyperboloid, and then the subsequent system performs beam splitting, receiving, demodulating and other processing on the parallel signal light to form effective information.
As shown in fig. 2, the whole system is composed of a double-leaf hyperboloid reflector 1, a divergent lens unit 2, a plurality of sets of convergent lens units 3 and a control structure 4, wherein the focal point of the divergent lens unit 2 coincides with the outer focal point of the double-leaf hyperboloid, the focal point of each convergent lens unit in the plurality of sets of convergent lens units 3 coincides with the inner focal point of the double-leaf hyperboloid reflector 1, namely, the focal point of each convergent lens unit shares an inner focal point, the lens units are respectively located at any position on a space spherical surface with the common inner focal point as the spherical center and the focal length of each lens unit as the radius, and the control structure 4 adjusts the azimuth and the pitch angle of each lens unit. This configuration is the basic form of the present invention.
When the parallel incident field light is incident from any direction in space, the electromechanical control system 4 selects the lens unit in the optimal state in the convergent lens group 3 according to a specific algorithm given by control software to adjust the azimuth angle and the pitch angle, so that the optical axis of the lens unit is consistent with the direction of the incident light beam, and then the parallel light beam is converged and transmitted by the lens unit, reflected by the double-leaf hyperboloid reflector 1 to become light pointing to the outer focus of the double-leaf hyperboloid reflector and then becomes emergent light parallel to the rotating shaft of the double-leaf hyperboloid reflector through the divergent lens unit 2. According to different task requirements and environments, the signal processing system splits and modulates the parallel emergent optical signals and converts the optical signals into signals. According to the principle that the optical path is reversible, parallel emergent signal beams emitted by the relay optical system can also be transmitted and reflected by the optical antenna system, so that the signal beams are accurately directed to the target and are emergent in parallel, and finally, the networking bidirectional communication function among all the laser communication platforms is realized.
Claims (6)
1. A common bifocal optical antenna system, comprising: comprises a double-sheet hyperboloid reflector (1), a divergent lens unit (2), a convergent lens unit (3) and a control system (4);
the center is a double-leaf hyperboloid reflector (1), and the double-leaf hyperboloid reflector (1) is provided with an inner focus and an outer focus; the focus in the rotating hyperboloid reflector (1) is an inner focus, and the focus outside the rotating hyperboloid reflector (1) is an outer focus; the multiple groups of convergent lens units (3) are distributed outside the rotating hyperboloid reflector, the focal points of each group of convergent lens units (3) are coincided with the inner focal point of the double-leaf hyperboloid reflector (1), namely, the focal points are shared, and the focal points of the divergent lens units (2) are coincided with the outer focal point of the double-leaf hyperboloid reflector (1), namely, the focal points are shared; the control system (4) consists of a rotating arm, a rotating shaft, an arc-shaped sliding rail and a related control structure; the rotating arm can do circular motion around the rotating shaft, and the convergent lens unit (3) can slide on the arc-shaped sliding rail, so that the convergent lens unit (3) can move in a spherical space with the shared inner focal point as the center of a circle and the focal length of the convergent lens unit (3) as the radius;
when a plurality of beams of parallel signal light enter the optical antenna system from different space angles, a control unit of the control system (4) adjusts a converging lens unit which is in an idle state and has the shortest adjustment time to complete directional capture and tracking on a working target, so that the optical axis direction of the controlled converging lens unit is consistent with the incident direction of the signal light, the parallel signal light is emitted to the inner focus of the double-sheet hyperboloid reflector (1), then is reflected by the outer surface of the double-sheet hyperboloid reflector (1), is converged to the outer focus of the double-sheet hyperboloid reflector (1), and finally is refracted by the diverging lens unit (2) to form emergent signal light parallel to the rotating shaft of the double-sheet hyperboloid.
2. A common bifocal optical antenna system according to claim 1, characterized in that: the divergent lens unit (2) is synthesized by adopting a plurality of optical lenses.
3. A common bifocal optical antenna system according to claim 1, characterized in that: the converging lens unit (3) adopts a plurality of optical lens combination or diffraction transmission optical converging elements.
4. A common bifocal optical antenna system according to claim 1, characterized in that: all optical lenses in the convergent lens unit (3) are positioned at any position of a spherical surface which takes the common inner focus as a spherical center and takes the focal length of each convex lens unit as a radius.
5. A common bifocal optical antenna system according to claim 1, characterized in that: the distance from the inner focus of the double-sheet hyperboloid reflector (1) to the vertex is 5 mm.
6. A common bifocal optical antenna system according to claim 1, characterized in that: the distance between the inner and outer focal points was 50 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010732675.0A CN111999875A (en) | 2020-07-27 | 2020-07-27 | Shared bifocal optical antenna system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010732675.0A CN111999875A (en) | 2020-07-27 | 2020-07-27 | Shared bifocal optical antenna system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111999875A true CN111999875A (en) | 2020-11-27 |
Family
ID=73467832
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010732675.0A Pending CN111999875A (en) | 2020-07-27 | 2020-07-27 | Shared bifocal optical antenna system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111999875A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1921797A (en) * | 2004-02-18 | 2007-02-28 | 国立大学法人大阪大学 | Endoscope system |
| JP2015099336A (en) * | 2013-11-20 | 2015-05-28 | 株式会社東芝 | Optical element and optical device |
| CN106646840A (en) * | 2016-12-15 | 2017-05-10 | 天津大学 | Equivalent optical system for omnidirectional point detector |
| CN107491594A (en) * | 2017-07-24 | 2017-12-19 | 北京空间飞行器总体设计部 | A kind of rope net dwi hastasana face accuracy computation method |
| WO2019170541A1 (en) * | 2018-03-05 | 2019-09-12 | Technische Universiteit Eindhoven | Extreme scanning focal-plane arrays using a double-reflector concept with uniform array illumination |
-
2020
- 2020-07-27 CN CN202010732675.0A patent/CN111999875A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1921797A (en) * | 2004-02-18 | 2007-02-28 | 国立大学法人大阪大学 | Endoscope system |
| JP2015099336A (en) * | 2013-11-20 | 2015-05-28 | 株式会社東芝 | Optical element and optical device |
| CN106646840A (en) * | 2016-12-15 | 2017-05-10 | 天津大学 | Equivalent optical system for omnidirectional point detector |
| CN107491594A (en) * | 2017-07-24 | 2017-12-19 | 北京空间飞行器总体设计部 | A kind of rope net dwi hastasana face accuracy computation method |
| WO2019170541A1 (en) * | 2018-03-05 | 2019-09-12 | Technische Universiteit Eindhoven | Extreme scanning focal-plane arrays using a double-reflector concept with uniform array illumination |
Non-Patent Citations (3)
| Title |
|---|
| 张建奇: "《红外***》", 31 December 2018 * |
| 张涛等: "多平台激光通信组网共焦点反射式光学天线设计", 《光学学报》 * |
| 张雅琳等: "空间激光通信一点对多点光学原理与方法的比较研究", 《兵工学报》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11522335B2 (en) | Transmitting device with a scanning mirror covered by a collimating cover element | |
| US8094081B1 (en) | Dual band radio frequency (RF) and optical communications antenna and terminal design methodology and implementation | |
| US8160452B1 (en) | Rapid acquisition, pointing and tracking optical system for free space optical communications | |
| CN111447012B (en) | Ad hoc network formation aircraft group laser omnidirectional communication optical system and communication method thereof | |
| CN102694604B (en) | For regular dodecahedron omnidirectional optical smart antenna and the communication means of FSO system | |
| CN103762998B (en) | Big visual field shared antenna hybrid microwave and laser wireless communication device | |
| CN110441757A (en) | Data transmission device and laser radar system | |
| US20040258417A1 (en) | Wireless optical system for multidirectional high bandwidth communications | |
| CN112994790A (en) | Omnidirectional laser communication system and method | |
| US5033833A (en) | Omni-directional optical antenna element | |
| Charles et al. | Hybrid RF/optical communication terminal with spherical primary optics for optical reception | |
| CN112526531B (en) | Dual-view-field infrared imaging system with multi-target laser ranging function | |
| CN111999875A (en) | Shared bifocal optical antenna system | |
| CN106712846B (en) | A kind of laser communication Optical devices adapting to different operating distance | |
| US7181143B2 (en) | Free space optics communication apparatus and free space optics communication system | |
| CN110441756A (en) | Data transmission device and laser radar system | |
| CN114142942B (en) | Large-breadth optical imaging and laser communication integrated terminal | |
| CN116366155B (en) | Compact annular vision field satellite laser communication terminal | |
| CN103293610B (en) | A kind of object lens of large relative aperture optical receiver antenna for short-distance wireless optical communication | |
| US6449076B1 (en) | Optical beam director for communications applications | |
| CN112578573B (en) | Portable free space quantum communication optical axis calibration system | |
| Takahashi et al. | Development of optical antennas utilizing free form surface optics for the high speed laser communication systems | |
| CN116599599B (en) | Communication and tracking integrated detection device based on single photon detection technology | |
| CN217428126U (en) | Transmit-receive integrated space laser communication terminal | |
| US11784713B2 (en) | Wide and fully flexible two-electromagnetic-beam steering device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20201127 |
|
| RJ01 | Rejection of invention patent application after publication |