Advanced collimation method in open space laser communication
A technology of air-to-ground laser communication and communication terminal, which is applied in the field of advanced aiming of air-to-ground laser communication satellite terminals, and can solve problems such as large resource consumption, complex system, and loss of communication optical power
Active Publication Date: 2014-08-13
星遥光宇(常州)科技有限公司
View PDF7 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0007] The purpose of the present invention is to provide a Point Ahead (Point Ahead) method for on-board terminals in air-to-ground laser communication, which solves the problems of high resource consumption, system complexity and loss of communication optical power caused by using an independent advanced pointing system
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0058] Attached below figure 2 The specific embodiment of the present invention will be further described.
[0059] A certain type of on-board communication terminal is mainly composed of a photoelectric two-dimensional turntable part and a rear optical path part. The instrument coordinate system X i Y i Z i and the overall optical path structure such as figure 2 As shown, the dotted line is 1064nm communication light, the solid line is 671nm beacon light, 6-1 is the emitting lens barrel, 6-2 is the total reflection mirror installed in the lens barrel, 6-3, 6-4, 6- 5 is a total reflection mirror installed in the turntable frame. The rear optical path is parallel to the surface formed by the X axis and the Z axis; the azimuth axis of the turntable coincides with the Z axis, and the pitch axis is perpendicular to the azimuth axis. The position shown in the figure is the zero position of the turntable reference. The communication terminal is installed on the satellite plat...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses an advanced collimation method in open space laser communication. The method comprises the following steps of: utilizing satellite platform GPS (Global Positioning System) data and gesture measurement system data to be combined with an optical path structure of a current communication end machine; calculating an imaging position of beaconing lights on a precise tracking camera when communication lights are collimated in advance; and taking the imaging position as a dynamic tracking center of a precise tracking system to control a rapid inclined mirror to deviate by the precise tracking system to enable an emitting-out direction of the communication lights to be deviated from an optical axis of the beaconing lights, so as to realize advanced collimation. The advanced collimation method disclosed by the invention is realized based on the precise tracking system, guarantees the execution precision of the advanced collimation, reduces the complexity of a system, reduces the weight, and does not influence the emitting-out power of the communication lights.
Description
Technical field: [0001] The present invention relates to space laser communication tracking and aiming technology, in particular to a method for point ahead (Point Ahead) of space-to-ground laser communication on-board terminals, which can be used for advanced pre-pointing of communication light of on-board terminals in tracking state. Background technique: [0002] Compared with other classical communication methods, space laser communication has the advantages of small system size, high communication rate and good confidentiality. However, in order to increase the communication distance and reduce system resource consumption, the divergence angle of communication light is generally close to the emission diffraction limit (μrad order ). Between two laser communication terminals that are moving relative to each other, the time delay caused by the spatial transmission of the beam causes a lag deviation in tracking. The communication link between terminals cannot be establish...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G05D3/12H04B10/112
Inventor 周辉张亮吴金才贾建军王建宇
Owner 星遥光宇(常州)科技有限公司