CN1322688C - Space laser communication motion double-terminal long distance transmission analog device - Google Patents

Abstract

The present invention relates to a simulation device for moving dual-terminal long-distance transmission of space laser communication. The structure of the device is a double-channel symmetrical system. In the structure, a light beam with a wavelength of lambda 1 is transmitted by a first tested laser communication terminal. Then the light beam successively passes though a first Fourier lens, a first wave-division reflection-penetrated lens, a first optical imaging amplifier, a scanning dual-surface reflecting mirror, a first reflecting mirror, a second optical imaging amplifier, a second wave-division reflection-penetrated lens and a second Fourier lens, and finally reaches a second tested laser communication terminal. A light beam with a wavelength of lambda 2 is transmitted by the second tested laser communication terminal, and then successively passes though a second Fourier lens, a second wave-division reflection-penetrated lens, a third optical imaging amplifier, the scanning dual-surface reflecting mirror, a third reflecting mirror, a fourth optical imaging amplifier, a fourth reflecting mirror, a first wave-division reflection-penetrated lens and a first Fourier lens, and finally reaches the first tested laser communication terminal. The device can realize the mutual far-field movement of two tested communication terminals. Furthermore, the device can be applied to the test and the verification of the capturing, scanning and tracking, communicating performance of satellite laser communication terminals.

Description

Space laser communication motion double-terminal long distance transmission analog device

Technical field:

The present invention relates to satellite laser communications, particularly a kind of space laser communication motion double-terminal long distance transmission analog device.This device can be realized the mutual far field motion of two tested communication terminals in the laboratory, can be applicable to the catching of satellite laser communications terminal, with detection and the checking taken aim at communication performance.

Background technology

Satellite laser communications comprises between the satellite, between satellite and other flying body, and the free space laser communication between satellite and the ground or the like.In order to keep the stable communication link between the laser communication terminal that two relative motions, laser communication terminal must comprise laser communication and optical acquisition with taking aim at two big subsystems.The operating distance of satellite laser communications is hundreds of to tens thousand of kilometers, therefore can not directly finish the Performance Detection and the checking of laser communication terminal in the space, so catching with the detection of taking aim at performance and communication performance and checking assessment of laser communication terminal must be carried out in ground and laboratory.

The research institute of external satellite laser communications terminal all adopts the means of parallel light tube in the laboratory and semi physical half method of emulation detects and the performance of checking laser communication terminal, the emission light beam that parallel light tube is used to launch the corrugated of a check measured laser communication terminal or be used to receive the measured laser communication terminal (is seen: 1.B.Laurent and G.Planche, " Silex overview after flightterminals campaign ", Proc.SPIE, Vol.2990, pp.10-22,1997), this scheme can be checked a laser communication terminal separately.But, also not two measured laser communication terminals are not carried out mutually directly butt joint so far and implement with the method for taking aim at the detection validation of communication performance.Main cause is also not have a kind of optical means to simulate under the lab space yardstick to realize the conversion of light beam from the near field distribution to the far-field distribution, and is two-way, and the far field of analog satellite simultaneously.Two satellite laser communications terminals all necessarily are in the other side's the optics far-field region in practice, and the mutual translation of terminal could produce the error signal that light is followed the tracks of except the rotation of itself.

Summary of the invention

The principle that the technical problem to be solved in the present invention is based on optical Fourier transformation and optical imagery amplification realizes the conversion of the near field distribution of light beam to far-field distribution, proposes a kind of space laser communication motion double-terminal long distance transmission analog device.It utilize the twin-channel structure in space realize light beam independently just, contrary two-way propagation, propose to carry out the relative translation of the principle realization laser communication terminal of double mirror binary channels angle scanning simultaneously at Fourier space frequency spectrum face, thereby can adopt optical analog to realize the mutual far field motion of two measured laser communication terminals in lab space, so carry out optical acquisition, with taking aim at the detection and the checking of communicating by letter with long distance laser.This device simple in structure, principle is reliable.

Technical solution of the present invention is as follows:

A kind of analogue means of space laser communication motion double-terminal long distance transmission, be characterised in that its formation: comprise the first measured laser communication terminal and the second measured laser communication terminal, the first measured laser communication terminal emission wavelength is λ ₁Laser beam earlier through first fourier transform lens, see through the saturating anti-mirror of first wavelength-division, by the first optical imagery amplification system, first mirror surface reflection by the scanning double-side speculum, through first mirror reflects, by the second optical imagery amplification system, again by second mirror reflects to the saturating anti-mirror of second wavelength-division, the light beam after the saturating anti-mirroring of second wavelength-division arrives at the second measured laser communication terminal by second fourier transform lens again;

Second measured laser communication terminal emission optical maser wavelength is λ ₂Light beam earlier by second fourier transform lens, see through the saturating anti-mirror of second wavelength-division, by the 3rd optical imagery amplification system, second mirror surface reflection by the scanning double-side speculum, through the 3rd mirror reflects, by the 4th optical imagery amplification system, again by the 4th mirror reflects to the saturating anti-mirror of first wavelength-division, the light beam after the saturating anti-mirroring of first wavelength-division arrives at the first measured laser communication terminal by first fourier transform lens again;

The saturating anti-mirror of described first wavelength-division is λ to wavelength ₁The laser high-transmission rate, be λ to wavelength ₂The laser high reflectance, the saturating anti-mirror of described second wavelength-division is λ to wavelength ₁The laser high reflectance, be λ to wavelength ₂The laser high-transmission rate;

First speculum and second speculum are for λ ₁The light beam high reflectance, the 3rd speculum and the 4th speculum are for λ ₂The light beam high reflectance;

First mirror surface of scanning double-side speculum is for λ ₁The light beam high reflectance, second mirror surface is for λ ₂The light beam high reflectance;

The focal plane of first fourier transform lens is positioned on the object plane of the first optical imagery amplification system, and the focal plane of second fourier transform lens is positioned on the object plane of the 3rd optical imagery amplification system; The image planes of the first optical imagery amplification system are positioned on the object plane of the second optical imagery amplification system; The image planes of the 3rd optical imagery amplification system are positioned on the object plane of the 4th optical imagery amplification system;

Described scanning double-side speculum is on the image planes of the first optical imagery amplification system and on the image planes of the 3rd optical imagery amplification system.

Along wavelength is λ ₁The light path of laser, described first fourier transform lens is placed between the saturating anti-mirror of first wavelength-division and the first optical imagery amplification system, is λ along wavelength accordingly ₂The light path of laser, second fourier transform lens is placed between saturating anti-mirror of second wavelength-division and the 3rd optical imagery amplification system.

The image planes of the described second optical imagery amplification system are between the second optical imagery amplification system and the second measured laser communication terminal.

The image planes of described the 4th optical imagery amplification system are between the 4th optical imagery amplification system and the first measured laser communication terminal.

The described first optical imagery amplification system, the second optical imagery amplification system, the 3rd optical imagery amplification system and the 4th optical imagery amplification system are made up of multistage einzel lens imaging amplifier, or be signal-lens single-stage optical imagery amplifier, or there are not lens.

Described scanning double-side speculum can rotate around two rotation axiss of quadrature, and two-sided height is anti-, can adopt the electronic accurate adjustment rack of two dimension, also can adopt motor or other driver drives driving levers to rotate two-sided transmitting mirror to realize the angular deflection of two dimension.

Technique effect of the present invention:

The present invention adds the long distance transmission analog that method that the cascade optical imagery amplifies has realized light beam by optical Fourier transformation, adopt double mirror to carry out the track translation relative motion simulation that the binary channels angle scanning has been realized ICBM SHF satellite terminal at the spatial frequency spectrum face, can guarantee in limited space, laboratory that like this two satellite laser communications terminals all necessarily are in the other side's optics far-field region, and produce the mutual motion of mutual translation with analog satellite, the optical acquisition that the present invention can be applicable to the satellite laser communications terminal detects and checking with the laboratory of taking aim at performance and communication performance, has very big using value for the development and the development of laser space communication terminal.

Description of drawings

Fig. 1 is an overall system light path schematic diagram of the present invention

Fig. 2 is the structural representation of aperture receiving system of the present invention

Among the figure: the 1.1-first measured laser communication terminal, 1.2-first fourier transform lens, 1.3-the saturating anti-mirror of first wavelength-division, 1.4-the first optical imagery amplification system, 1.5-scanning double-side speculum, 1.6-first speculum, 1.7-the second optical imagery amplification system, 1.8-second speculum, the saturating anti-mirror of 1.9-second wavelength-division, 1.10-second fourier transform lens, 1.11-the second measured laser communication terminal, 1.12-the 3rd optical imagery amplification system, 1.13-the 3rd speculum, 1.14-the 4th optical imagery amplification system, 1.15-the 4th speculum.2.1-aperture, 2.2-convergent lens, 2.3-photodetector.

Embodiment

Schematic diagram of the present invention is seen the overall system light path schematic diagram of Fig. 1: the first measured laser communication terminal, 1.1 emission laser beam are earlier by first fourier transform lens 1.2, again by the saturating speculum 1.3 of first wavelength-division, again by the first optical imagery amplification system 1.4, again by 1.5 reflections of scanning double-side speculum, again by 1.6 reflections of first speculum, again by the second optical imagery amplification system 1.7, reflex to the saturating speculum 1.9 of second wavelength-division by second speculum 1.8 again, arrive at the second measured laser communication terminal 1.11 by second fourier transform lens 1.10 again through the light beam after the reflection; The second measured laser communication terminal, 1.11 emission laser beam are earlier by second fourier transform lens 1.10, again by the saturating speculum 1.9 of second wavelength-division, again by the 3rd optical imagery amplification system 1.12, again by 1.5 reflections of scanning double-side speculum, again by 1.13 reflections of the 3rd speculum, again by the 4th optical imagery amplification system 1.14, reflex to the saturating speculum 1.3 of first wavelength-division by the 4th speculum 1.15 again, arrive at the first measured laser communication terminal 1.1 by first fourier transform lens 1.2 again through the light beam after the reflection.

The saturating anti-mirror 1.3 of first wavelength-division can be placed on before first fourier transform lens 1.2, that is, the first measured laser communication terminal, 1.1 emission laser beam are passed through first fourier transform lens 1.2 again by the saturating anti-mirror 1.3 of first wavelength-division earlier.Equally, the saturating anti-mirror 1.9 of second wavelength-division can be placed on after second fourier transform lens 1.10, that is, the second measured laser communication terminal, 1.11 emission laser beam are passed through second fourier transform lens 1.10 again by the saturating anti-mirror 1.9 of second wavelength-division earlier.

Suppose that the laser beam on the first measured laser communication terminal, the 1.1 emission bores is distributed as a ₁(x, y), wavelength is λ ₁Laser beam on the second measured laser communication terminal, the 1.11 emission bores is distributed as a ₂(x, y), wavelength is λ ₂The saturating anti-mirror of first wavelength-division 1.3 is for λ ₁The logical light of light beam and for λ ₂Beam reflection, the saturating anti-mirror of second wavelength-division 1.9 is for λ ₂The logical light of light beam and for λ ₁Beam reflection.First speculum 1.6 and second speculum 1.8 are for λ ₁Beam reflection, the 3rd speculum 1.13 and the 4th speculum 1.15 are for λ ₂Beam reflection, first minute surface of scanning double-side speculum 1.5 is for λ ₁Beam reflection, and second minute surface is for λ ₂Beam reflection.

Laser beam a on the first measured laser communication terminal, 1.1 transmitting apertures ₁(x y) at first carries out the conversion of Fourier far field by first fourier transform lens 1.2, and the focal length of first fourier transform lens 1.2 is f ₁, the distance of transmitting aperture and fourier transform lens is l ₁The focal plane of first fourier transform lens 1.2 is positioned on the object plane of the first optical imagery amplification system 1.4, and the first optical imagery amplification system 1.4 is made up of multistage einzel lens imaging amplifier, and total multiplication factor is ± M ₁, its positive sign represents that erect image amplifies, negative sign represents that inverted image amplifies.The image planes of the first optical imagery amplification system 1.4 are positioned on the object plane of the second optical imagery amplification system 1.7, and the second optical imagery amplification system 1.7 is made up of multistage einzel lens imaging amplifier, and total multiplication factor is ± M ₂, its positive sign represents that erect image amplifies, negative sign represents that inverted image amplifies.The image planes of the second optical imagery amplification system 1.7 are positioned on second fourier transform lens 1.10.The distance of second fourier transform lens 1.10 and the second measured laser communication terminal 1.11 is l ₂Scanning double-side speculum 1.5 is on the image planes of the first optical imagery amplification system 1.4.If a ₁(x, optical Fourier transformation y) is The angle of rotation of scanning double-side speculum 1.5 is Δ θ, then will produce the optical Fourier transformation that moves with linear phase of the amplification of the first measured laser communication terminal, 1.1 emission laser beam on the image planes of the second optical imagery amplification system 1.7:

$A_1^{\text{'}}(x,y)=K{A}_1[\frac{x}{(\±M_1)(\±M_2){\mathrm{\λ}}_1{f}_1},\frac{y}{(\±M_1)(\±M_2){\mathrm{\λ}}_1{f}_1}]$

$\×\exp \left[\mathrm{j\π}(1-\frac{l_1}{f_1})\frac{x^2+y^2}{{\left(M_1{M}_2\right)}^2{\mathrm{\λ}}_1{f}_1}\right]\exp \left[j2\mathrm{\π}\frac{x\sin \left(2\mathrm{\Δ\θ}\right)}{{\mathrm{\λ}}_1\left(M_2\right)}\right]\exp \left(\mathrm{j\π}\frac{x^2+y^2}{{\mathrm{\λ}}_1{M}_p^i{f}_p^i}\right).---\left(1\right)$

Wherein: M _P ⁱBe the multiplication factor of the afterbody Single-lens Optical imaging amplifier of the second optical imagery amplification system 1.7, f _P ⁱFocal length for its lens; K is a constant.

By the light field behind second fourier transform lens 1.10 be:

${A^{\′\′}}_1(x,y)={A^{\text{'}}}_1(x,y)\exp (-\mathrm{j\π}\frac{x^2+y^2}{{\mathrm{\λ}}_1{f}_2})---\left(2\right)$

At l ₁=f ₁Condition order $M_P^i{f}_P^i=f_2$ Can compensate A " ₁(x, y) the middle phase place quadratic term that exists.

Light field behind second fourier transform lens 1.10 will be collected by the primary mirror of the second measured laser communication terminal 1.11, produce light field A on the focal plane of this primary mirror " ₁(focal length of establishing laser communication terminal primary mirror is f for x, optical Fourier transformation y) _R2, its aperture function and Fourier transform are respectively a _R2(x, y) and

When the hot spot on the image planes of the second optical imagery amplification system 1.7 was enough big, the hot spot light distribution on the primary mirror focal plane of the second measured laser communication terminal 1.11 was:

As seen: at this moment the second measured laser communication terminal 1.11 is in the far-field region of the first measured laser communication terminal 1.1, and it is relevant with the diffraction bore of itself to receive spot size; The deflection of scanning double-side speculum 1.5 will cause receiving moving of hot spot.

Laser beam a on the second measured laser communication terminal, 1.11 transmitting apertures ₂(x y) at first carries out the conversion of Fourier far field by second fourier transform lens 1.10, and the focal length of second fourier transform lens 1.10 is f ₁, the distance of the transmitting aperture of the second measured laser communication terminal 1.11 and second fourier transform lens 1.10 is l ₂The focal plane of second fourier transform lens 1.10 is positioned on the object plane of the 3rd optical imagery amplification system 1.12, and the 3rd optical imagery amplification system 1.12 is made up of multistage einzel lens imaging amplifier, and total multiplication factor is ± M ₃, its positive sign represents that erect image amplifies, negative sign represents that inverted image amplifies.The image planes of the 3rd optical imagery amplification system 1.12 are positioned on the object plane of the 4th optical imagery amplification system 1.14, and the 4th optical imagery amplification system 1.14 is made up of multistage einzel lens imaging amplifier, and total multiplication factor is ± M ₄, its positive sign represents that erect image amplifies, negative sign represents that inverted image amplifies.The image planes of the 4th optical imagery amplification system 1.14 are positioned on first fourier transform lens 1.2.The distance of first fourier transform lens 1.2 and the first measured laser communication terminal 1.1 is l ₁Scanning double-side speculum 1.5 is on the image planes of the 3rd optical imagery amplification system 1.12.If a ₂(x, optical Fourier transformation y) is

The angle of rotation of scanning double-side speculum 1.5 is Δ θ, then will produce the optical Fourier transformation that moves with linear phase of the amplification of the second measured laser communication terminal, 1.11 emission laser beam on the image planes of the 4th optical imagery amplification system 1.14:

${A^{\text{'}}}_2(x,y)=K{A}_2[\frac{x}{(\±M_3)(\±M_4){\mathrm{\λ}}_2{f}_2},\frac{y}{(\±M_3)(\±M_4){\mathrm{\λ}}_2{f}_2}]$

$\×\exp \left[\mathrm{j\π}(1-\frac{l_2}{f_2})\frac{x^2+y^2}{{\left(M_3{M}_4\right)}^2{\mathrm{\λ}}_2{f}_2}\right]\exp [\±j2\mathrm{\π}\frac{x\sin \left(2\mathrm{\Δ\θ}\right)}{{\mathrm{\λ}}_2\left(M_4\right)}]\exp \left(\mathrm{j\π}\frac{x^2+y^2}{{\mathrm{\λ}}_2{M}_s^i{f}_s^i}\right).---\left(4\right)$

Wherein: M _S ⁱBe the multiplication factor of the afterbody Single-lens Optical imaging amplifier of the 4th optical imagery amplification system 1.14, f _S ⁱFocal length for its lens; K is a constant.

By the light field behind the 4th fourier transform lens 1.14 be:

${A^{\′\′}}_2(x,y)={A^{\text{'}}}_2(x,y)\exp (-\mathrm{j\π}\frac{x^2+y^2}{{\mathrm{\λ}}_2{f}_1})---\left(5\right)$

At l ₂=f ₂Condition order $M_s^i{f}_s^i=f_1$ Can compensate A " ₂(x, y) the middle phase place quadratic term that exists.

Light field behind first fourier transform lens 1.2 will be collected by the primary mirror of the first measured laser communication terminal 1.1, produce light field A on the focal plane of this primary mirror " ₂(focal length of establishing laser communication terminal primary mirror is f for x, optical Fourier transformation y) _R1, its aperture function and Fourier transform are respectively a _R1(x, y) and When the hot spot on the image planes of the 4th optical imagery amplification system 1.14 was enough big at once, the hot spot light distribution on the primary mirror focal plane of the first measured laser communication terminal 1.1 was:

As seen: at this moment the first measured laser communication terminal 1.1 is in the far-field region of the second measured laser communication terminal 1.11, and it is relevant with the diffraction bore of itself to receive spot size; The deflection of scanning double-side speculum 1.5 will cause receiving moving of hot spot.

The deflection of scanning double-side speculum 1.5 can produce the moving of reception spot size and the moving of the reception spot size of the second measured laser communication terminal 1.11 of the first measured laser communication terminal 1.1 simultaneously, promptly can simulate two relative motions between the laser communication terminal.

This device also can carry out the long distance laser communication check for a free space laser communication terminal, if still keep the first measured laser communication terminal 1.1 to be dut terminal, then the second measured laser communication terminal 1.11 should be substituted by aperture receiving system shown in Figure 2.Among Fig. 2, the light beam that sends from second fourier transform lens 1.10 will at first be received bore by aperture 2.1 restrictions, by convergent lens 2.2 light harvestings, be surveyed by photodetector 2.3 then again.At this moment equivalent transmission range is:

$L=\frac{M_1{M}_2{f}_1}{d_h}{d}_t---\left(7\right)$

Wherein, d _hBe the diameter of aperture, d _tNumerical value for the true bore of laser communication terminal.

The first optical imagery amplification system 1.4, the second optical imagery amplification system 1.7, the 3rd optical imagery amplification system 1.12 and the 4th optical imagery amplification system 1.14 can be signal-lens single-stage optical imagery amplifiers, also can be to connect the multistage optical imagery amplifier that forms of connection, also can become multiplication factor and be+1 direct transmission without amplifier by single-stage optical imagery amplifier.

If the focal length of the lens of n level single-stage optical imagery amplifier is f _n ⁱ, object distance is l _{N, 1} ⁱ, image distance is l _{N, 2} ⁱ, multiplication factor is M _n ⁱ, then have:

$\frac{1}{l_{n,1}^i}+\frac{1}{l_{n,2}^i}=\frac{1}{f_n^i},---\left(8\right)$

$M_n^i=\frac{l_{n,2}^i}{l_{n,1}^i}.---\left(9\right)$

This single-stage optical imagery amplifier be input as divergent spherical wave, spot diameter is d _{N, 1} ⁱ, centre distance is L _{N, 1} ⁱ, the spot diameter of the divergent spherical wave after then it amplifies is d _{N, 2} ⁱWith centre distance be L _{N, 2} ⁱFor:

$d_{n.2}^i=M_n^i{d}_{n,1}^i,---\left(10\right)$

$L_{n,2}^i=\frac{M_n^i{f}_n^i{L}_{n,1}^i}{\frac{f_n^i}{M_n^i}+L_{n,1}^i}\≈M_n^i{f}_n^i.---\left(11\right)$

Above-mentioned spherical wave on the image planes of n level single-stage optical imagery amplifier is the object plane input of (n+1) level single-stage optical imagery amplifier.

N level single-stage optical imagery amplifier is not in the light the lowest calibre  of lens in order to guarantee _{N, min} ⁱFor:

Because the scanning of scanning double-side speculum, may there be deflection angle α in the input of n level single-stage optical imagery amplifier _n ⁱ, it produces hot spot moving on lens, and therefore in order to guarantee logical light, the lowest calibre of lens should be modified to  ' _{N, min} ⁱFor

Suppose that N level single-stage optical imagery amplifier is the first order of the second optical imagery amplification system, then:

${\mathrm{\α}}_N^i=2\mathrm{\θ},---\left(14\right)$

${\mathrm{\α}}_{N+s}^i=\frac{2\mathrm{\θ}}{M_N^i{M}_{N+1}^i...M_{N+s-1}^i}.---\left(15\right)$

Therefore, the aperture of lens of each amplifier must be far longer than the lowest calibre of above-mentioned definition:

The bore of first fourier transform lens 1.2 is  ₁The bore of the first measured laser communication terminal 1.1 is  _{R, 1}, the bore of second fourier transform lens 1.10 is  ₂The bore of the second measured laser communication terminal 1.11 is  _{R, 2}, for the influence of the transfer function that reduces optical Fourier transformation should be satisfied following condition as far as possible:

 ₁＞＞ _，1， (13)

 ₂＞＞ _r，2。(14)

The invention will be further described below by embodiment.

Suppose: laser communication link is between high rail satellite and the low orbit satellite, and interstellar distance is 40000km, and the bore of laser communication terminal is φ 250mm, and the primary mirror focal length is 1m, and laser divergence is 20 μ rad, is 1 μ rad with taking aim at precision.The scanning angle of setting detection validation is 180mrad (～10 °).

Consider the symmetrical structure arrangement of two-way light path: the design of first fourier transform lens 1.2 and second fourier transform lens 1.10 is identical, the identical ( of bore ₁= ₂), the identical (f of focal length ₁=f ₂); The first optical imagery amplification system 1.4 and the 3rd optical imagery amplification system 1.12 are single-stage imaging amplifier, the identical (M of its structure ₁=M ₃); The second optical imagery amplification system 1.7 and the 4th optical imagery amplification system 1.14 are twin-stage imaging amplifier, the identical (M of its structure ₂=M ₄).

The focal distance f of design fourier transform lens ₁=10m, design M ₁=-20, design M ₂=+400 (promptly-20 *-20), therefore equivalent transmission range f ₁M ₁M ₂=80km.The bore of two fourier transform lenses is designed to  ₁= ₂=φ 500mm, much larger than the bore of laser communication terminal, the diffraction limit of fourier transform lens is 4 μ rad.

Thereby, divergent spherical wave diameter on the object plane of first order single-stage imaging amplification system 1.1 is φ 0.2mm, divergent spherical wave diameter on the object plane of second level single-stage imaging amplification system 1.7 is φ 4mm, divergent spherical wave diameter on the object plane of third level single-stage imaging amplification system 1.12 is φ 80mm

The first optical imagery amplification system 1.1 is a single-stage imaging amplifier, and the design focal length is 50mm, and bore is φ 40mm, and multiplication factor is 20.The second level is learned imaging amplification system 1.7 and is made up of two single-stage imaging amplifiers, previous single-stage imaging amplifier, and focal length is 50mm, and bore is φ 40mm, and multiplication factor is 20.The single-stage imaging amplifier in back, focal length is 500mm, and bore is φ 250mm, and multiplication factor is 20, and compensation condition is also satisfied in the design of its focal length.All single-stage imaging amplifiers all satisfy the bore relation.

The angular deflection rate that the deflection of scanning double-side speculum 1.5 receives hot spot for the laser communication terminal is 5 μ rad * (Δ θ/mrad), being equivalent to speculum and rotating 0.2mrad with taking aim at precision of laser communication terminal.

Adopt the structure of Fig. 2 to carry out the test of long distance laser communication performance, following table has provided the relation of equivalent propagation distance and aperture 2.1 diameters:

Hole diameter	20mm	5mm	1mm	0.5mm
					The equivalence propagation distance	500km	4000km	20000km	40000km

Claims (6)

1, a kind of analogue means of space laser communication motion double-terminal long distance transmission, be characterised in that its formation: comprising the first measured laser communication terminal (1.1) and the second measured laser communication terminal (1.11), is λ from first measured laser communication terminal (1.1) emission wavelength ₁Laser beam earlier through first fourier transform lens (1.2), see through the saturating anti-mirror of first wavelength-division (1.3), by the first optical imagery amplification system (1.4), first mirror surface reflection by scanning double-side speculum (1.5), reflect through first speculum (1.6), by the second optical imagery amplification system (1.7), reflex to the saturating anti-mirror of second wavelength-division (1.9) by second speculum (1.8) again, the light beam after the saturating anti-mirror of second wavelength-division (1.9) reflection arrives at the second measured laser communication terminal (1.11) by second fourier transform lens (1.10) again;

The second measured laser communication terminal (1.11) emission optical maser wavelength is λ ₂Light beam earlier by second fourier transform lens (1.10), see through the saturating anti-mirror of second wavelength-division (1.9), by the 3rd optical imagery amplification system (1.12), second mirror surface reflection by scanning double-side speculum (1.5), reflect through the 3rd speculum (1.13), by the 4th optical imagery amplification system (1.14), reflex to the saturating anti-mirror of first wavelength-division (1.3) by the 4th speculum (1.15) again, the light beam after the saturating anti-mirror of first wavelength-division (1.3) reflection arrives at the first measured laser communication terminal (1.1) by first fourier transform lens (1.2) again;

The saturating anti-mirror of described first wavelength-division (1.3) is λ to wavelength ₁The laser high-transmission rate, be λ 2 laser high reflectances to wavelength, the saturating anti-mirror of described second wavelength-division (1.9) is λ to wavelength ₁The laser high reflectance, be λ to wavelength ₂The laser high-transmission rate;

First speculum (1.6) and second speculum (1.8) are for λ ₁The light beam high reflectance, the 3rd speculum (1.13) and the 4th speculum (1.15) are for λ ₂The light beam high reflectance;

First mirror surface of scanning double-side speculum (1.5) is for λ ₁The light beam high reflectance, second mirror surface is for λ ₂The light beam high reflectance;

The focal plane of first fourier transform lens (1.2) is positioned on the object plane of the first optical imagery amplification system (1.4), and the focal plane of second fourier transform lens (1.10) is positioned on the object plane of the 3rd optical imagery amplification system (1.12); The image planes of the first optical imagery amplification system (1.4) are positioned on the object plane of the second optical imagery amplification system (1.7); The image planes of the 3rd optical imagery amplification system (1.1 2) are positioned on the object plane of the 4th optical imagery amplification system (1.14);

Described scanning double-side speculum (1.5) is on the image planes of the first optical imagery amplification system (1.4) and on the image planes of the 3rd optical imagery amplification system (1.12).

2, the analogue means of space laser communication motion double-terminal long distance transmission according to claim 1 is characterized in that along wavelength be λ ₁The light path of laser, described first fourier transform lens (1.2) is placed between the saturating anti-mirror of first wavelength-division (1.3) and the first optical imagery amplification system (1.4), is λ along wavelength accordingly ₂The light path of laser, second fourier transform lens (1.10) is placed between saturating anti-mirror of second wavelength-division (1.9) and the 3rd optical imagery amplification system (1.12).

3, the analogue means of space laser communication motion double-terminal long distance transmission according to claim 1 is characterized in that along wavelength be λ ₁Laser optical path, the image planes of the described second optical imagery amplification system (1.7) are positioned between the second optical imagery amplification system (1.7) and the second measured laser communication terminal (1.11).

4, the analogue means of space laser communication motion double-terminal long distance transmission according to claim 1 is characterized in that along wavelength be λ ₂Laser optical path, the image planes of described the 4th optical imagery amplification system (1.14) are positioned between the 4th optical imagery amplification system (1.14) and the first measured laser communication terminal (1.1).

5, the analogue means of space laser communication motion double-terminal long distance transmission according to claim 1, it is characterized in that the described first optical imagery amplification system (1.4), the second optical imagery amplification system (1.7), the 3rd optical imagery amplification system (1.12) and the 4th optical imagery amplification system (1.14) be made up of multistage einzel lens imaging amplifier, or be signal-lens single-stage optical imagery amplifier, or there are not lens.

6, the analogue means of space laser communication motion double-terminal long distance transmission according to claim 1 is characterized in that described scanning double-side speculum (1.5) has two orthogonal deflection axles.