CN203827349U

CN203827349U - Optics antenna of one-to-many laser communication terminal

Info

Publication number: CN203827349U
Application number: CN201420234595.2U
Authority: CN
Inventors: 张鹏; 刘显著; 王超; 王天枢; 姜会林
Original assignee: Changchun University of Science and Technology
Current assignee: Changchun University of Science and Technology
Priority date: 2014-05-08
Filing date: 2014-05-08
Publication date: 2014-09-10
Anticipated expiration: 2024-05-08

Abstract

The utility model relates to an optics antenna of a one-to-many laser communication terminal which belongs to the wireless communication field and solves the problems that the prior art is small in vision field, big in volume, complex in system and high in cost. A first lens, a second lens and a third lens are coaxial to form a three-cemented-lens group; the first lens is a crescent-shaped lens, the second lens and the third lens are plano-convex lenses; the curved surfaces of the two plano-convex lenses are sphere surfaces and concentric; the back concave surface of the first lens and the front convex surface of the second lens are matched and cemented; the plane surface of the second lens is cemented with the plane surface of the third lens; an aperture diaphragm is positioned at the co-sphere-center of the two plano-convex lenses and is perpendicular to the main optics axis; a space optical collimator consists of a collimation lens and a pig tail; the surface of the collimation lens is pressed against the surface of the third lens; and a plurality of space optical collimators are arranged on the surface of the third lens and are arranged at the optics axis and are evenly symmetrically arrayed relative to the optics axis. The optics antenna of the one-to-many laser communication terminal has bigger application potential in the wireless communication light duty terminal.

Description

The optical antenna of one-to-many laser communication terminal

Technical field

The utility model relates to a kind of optical antenna of one-to-many laser communication terminal, belongs to wireless communication field, and the present invention is applied to free laser communication field.

Background technology

Along with making rapid progress of information technology, fund and the manpower that drop into energetically current many countries and regions are carried out FreeSpace Laser Communications Technique research, by the experimental study in-orbit of the theoretical researches of nearly 30 years, analogue simulation, tackling problems in key technologies, principle prototype development, ground demonstration and multiple links, approach or surmount the theoretical limit of traditional radio communication, having brought into play gradually FreeSpace Laser Communications Technique advantage.But successfully laser communication demonstration and verification remains point to point operation pattern in-orbit.This kind of pattern greatly limited the foundation of future space information network, and a point-to-multipoint mode of operation progressively becomes study hotspot for this reason.

Be some optical antenna to multipoint laser communication mode of operation critical piece, for the research of concrete optical antenna mainly by several schemes, comprise adopt Catadioptric system as the multipoint reception scheme of reception antenna, adopt detector array and focal plane coupling expand field of view of receiver scheme, adopt the paraboloid of revolution and the near scheme of parabola multipoint reception.The visual field that this type of scheme increases is limited, and poor practicability, on technology is implemented, has any problem.Therefore realize that field of view of receiver is large, volume is little, cost is low, the optical antenna of the simple point-to-multipoint communication terminal of system is very important work.

China Patent Publication No. is CN102231645B, and name is called " a kind of optical antenna for multipoint laser communication ", and as shown in Figure 1, this apparatus structure is made up of multiple reflection mirror splicing optical antenna 1 and cassette contracting beam system 2 with APT control system.

This technical scheme is that the method based on splicing builds approximate paraboloidal shape, and its principle is that reflection ray is the light parallel along parabola rotating shaft in the time of the focus of the incident ray directive paraboloid of revolution.Concrete structure is for to be divided into M layer by continuous rotation parabola along major axes orientation, and described M is positive integer.Every layer building N level crossing, the section that level crossing is the paraboloid of revolution, thus this scheme can realize the laser communication of a point-to-multipoint.But the optical antenna bulky that this scheme is constructed, and with than the point-to-point more complicated APT control system of tradition, cost is high, and system complex, is relatively applicable to the use of the large-scale communication systems such as relay station.

Summary of the invention

The utility model be solve that optical antenna for multipoint laser communication device in prior art exists that visual field is little, volume large, system complex, problem that cost is high, a kind of large visual field optical antenna device of three balsaming lens compositions has been proposed.

Technical solutions of the utility model: the optical antenna of one-to-many laser communication terminal, it comprises first lens, the second lens, aperture diaphragm, the 3rd lens and multiple spatial light collimater;

It is characterized in that, the coaxial composition of first lens, the second lens and the 3rd lens three balsaming lens groups, wherein, first lens is meniscus lens, and the second lens and the 3rd lens are planoconvex spotlight, and the curved surface of two planoconvex spotlights is sphere and is with one heart; The back concave surface of first lens is mated gummed with the convex front surface of the second lens, the plane gummed of the plane of the second lens and the 3rd lens; Aperture diaphragm is arranged on the common centre of sphere place of two planoconvex spotlights, and vertical with primary optical axis;

Spatial light collimater is made up of collimating lens and tail optical fiber, and collimating lens surface label is on the 3rd lens surface, and multiple spatial light collimater is on the 3rd lens surface, arranges symmetrically at optical axis position and about optical axis.

The beneficial effects of the utility model are:

The utility model has adopted three balsaming lens groups, and three lens are that planoconvex spotlight and sphere are concentric different radii, and aperture diaphragm is placed on centre of sphere place.Thereby extraneous incident can not occurred on the sphere of deviation direct projection to the three lens by the laser of the centre of sphere, and n × n spatial light collimater is placed in the focal plane of this optical antenna, thereby can incide diverse location with the light of different angles, thereby realize a point-to-multipoint communications reception.Mode like this, each tail optical fiber of n × n spatial light collimater, on the path separating, collimation sends light energy to optical antenna, thereby realizes a point-to-multipoint communications transmit.From then on known this utility model of process has deducted complicated APT tracking system, has greatly reduced system complex degree, cost, volume.Other three balsaming lens groups spherical aberration corrector, coma etc. preferably, and maximum field of view is greater than 150 °, thus improve communication quality and the usage range of communication antenna.And structure of the present invention is compacter, simple, be conducive to miniaturization and the lightweight of one-to-many laser communication terminal, will there is larger application potential at the small-sized terminal of radio communication.

Brief description of the drawings

Fig. 1 is the schematic diagram of prior art optical antenna for multipoint laser communication device.

Fig. 2 is the schematic diagram of the optical antenna of the utility model one-to-many laser communication terminal.

Embodiment

Below in conjunction with accompanying drawing, the embodiment of the present invention is elaborated.

As shown in Figure 2, the optical antenna of one-to-many laser communication terminal, it comprises first lens 3, the second lens 4, aperture diaphragm 5, the 3rd lens 6 and multiple spatial light collimater 7.

First lens 3, the second lens 4 and the 3rd lens 6 coaxial composition three balsaming lens groups, wherein, first lens 3 is meniscus lens, and the second lens 4 and the 3rd lens 6 are planoconvex spotlight, and the curved surface of two planoconvex spotlights is sphere and is with one heart.The back concave surface of first lens 3 is mated gummed with the convex front surface of the second lens 4, the plane gummed of the plane of the second lens 4 and the 3rd lens 6.

Aperture diaphragm 5 is arranged on the common centre of sphere place of two planoconvex spotlights, and vertical with primary optical axis; Its size is calculated and is determined by communication distance, beam divergence angle and relative aperture value.

Spatial light collimater 7 is made up of collimating lens 7-1 and tail optical fiber 7-2, and collimating lens 7-1 surface label, on the 3rd lens 6 surfaces, plays the effect of space optical coupling to tail optical fiber, and tail optical fiber 7-2 is monomode fiber or multimode fiber, and tail optical fiber connects follow-up system.

And multiple spatial light collimaters 7, on the 3rd lens 6 surfaces, are arranged symmetrically at optical axis position and about optical axis.

Incide first lens 3 surfaces from the incident laser light beam of space different directions, light reaches the surface of multiple spatial light collimaters 7 successively through the second lens 4, aperture diaphragm 5, the 3rd lens 6, assembled and be coupled into tail optical fiber 7-2 by collimating lens 7-1, incident light enters and enters follow-up system along tail optical fiber 7-2 and complete one-to-many laser communication and receive.And the emergent light of different tail optical fiber 7-2 transmission is through the inverse process of spatial light collimater 7 collimation transmittings through receiving, most Communication rays is launched, thereby completed one-to-many laser communication transmitting.

The utility model can obtain the optical antenna of the one-to-many laser communication terminal of miniaturization, along with the development of various optical materials and photoelectric device, will obtain the antenna that volume is less, cost is lower, and its application also will be more extensive.

Claims

1. the optical antenna of one-to-many laser communication terminal, it comprises first lens (3), the second lens (4), aperture diaphragm (5), the 3rd lens (6) and multiple spatial light collimater (7);

It is characterized in that, first lens (3), the second lens (4) and the 3rd lens (6) coaxially form three balsaming lens groups, wherein, first lens (3) is meniscus lens, the second lens (4) and the 3rd lens (6) are planoconvex spotlight, and the curved surface of two planoconvex spotlights is sphere and is with one heart; The back concave surface of first lens (3) is mated gummed with the convex front surface of the second lens (4), the plane gummed of the plane of the second lens (4) and the 3rd lens (6); Aperture diaphragm (5) is arranged on the common centre of sphere place of two planoconvex spotlights, and vertical with primary optical axis;

Spatial light collimater (7) is made up of collimating lens (7-1) and tail optical fiber (7-2), collimating lens (7-1) surface label is on the 3rd lens (6) surface, and multiple spatial light collimaters (7), on the 3rd lens (6) surface, are arranged symmetrically at optical axis position and about optical axis.

2. the optical antenna of one-to-many laser communication terminal according to claim 1, is characterized in that, tail optical fiber (7-2) is monomode fiber or multimode fiber.