CN216870812U

CN216870812U - Universal wind-measuring laser radar receiving and transmitting combined telescope device

Info

Publication number: CN216870812U
Application number: CN202121337818.4U
Authority: CN
Inventors: 林宗强; 苏景佑; 张云山; 姚兆宁; 刘恒
Original assignee: Nanjing Zhisu Iot Technology Co ltd
Current assignee: Nanjing Zhisu Iot Technology Co ltd
Priority date: 2021-06-16
Filing date: 2021-06-16
Publication date: 2022-07-01
Anticipated expiration: 2031-06-16

Abstract

The utility model discloses a universal wind lidar receiving and transmitting combined telescope device which comprises a telescope device body, wherein the telescope device body is connected with a circulator, the telescope device body comprises a collimation coupling lens, a beam expanding lens and a compensating lens, the collimation coupling lens and the beam expanding lens are in threaded connection, the beam expanding lens is arranged by adopting a Galileo type beam expanding lens, and the beam expanding lens consists of a concave lens and a convex lens. The telescope device can be simultaneously suitable for the wind measuring laser radar with two schemes of an optical fiber circulator and a space optical circulator by arranging the detachable collimating coupling mirror, solves the problems that the existing telescope device needs to be respectively designed and has no formed product, realizes universal design, reduces the optical aberration of a telescope system by the compensating mirror, and achieves good imaging effect.

Description

Universal wind-measuring laser radar receiving and transmitting combined telescope device

Technical Field

The utility model relates to the technical field of wind lidar, in particular to a universal wind lidar transceiver telescope device.

Background

Compared with the traditional radar, the laser wind-finding radar has higher resolution, higher sensitivity, wider detection range and stronger anti-interference capability. The method is widely applied to the fields of aerospace, meteorological observation, wind power generation and the like.

The telescope is an important component of the wind lidar, the two general circulator schemes of the wind lidar adopting the receiving and transmitting combination are an optical fiber circulator and a spatial light circulator, and the laser beams emitted by the optical fiber circulator are divergent and parallel, so the corresponding receiving and transmitting telescope structures of the two schemes are different. However, in both the fiber circulator scheme and the spatial optical circulator scheme, a beam expander is required to expand the emitted beam and compress the spot of the echo beam, and a compensation mirror is required to compensate the aberration of the transmitted and received beams.

The optical fiber circulator scheme and the spatial optical circulator scheme adopted by the existing wind measuring laser radar have advantages and disadvantages respectively. Although the optical fiber circulator has a simple structure and a small volume and is beneficial to integration, the optical fiber circulator has high phase intensity noise and high requirement on the line width of a laser light source, and the cost of the light source is increased; the spatial light circulator can effectively control the intensity of stray light, reduces the requirement of the line width of a light source, but has large volume and complex assembly and adjustment, and simultaneously needs to consider the problem of the coupling efficiency between the optical fiber and the circulator.

However, the transceiver telescopes used in the market have poor universality, cannot be simultaneously applied to two circulator schemes, and may need special design in practical use, which is not favorable for production and reduces the flexibility of the system.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problems in the background technology and provides a universal wind lidar transmitting-receiving combined telescope device.

In order to achieve the purpose, the utility model adopts the following technical scheme:

the utility model provides a telescope device is put in receiving and dispatching of general anemometry lidar, includes the telescope device body, telescope device body coupling has the circulator, the telescope device body includes collimation coupling mirror, beam expanding lens and compensating mirror, be threaded connection between collimation coupling mirror and the beam expanding lens and set up, the beam expanding lens adopts Galileo's formula beam expanding lens setting, the beam expanding lens comprises concave lens and convex lens.

Preferably, the collimating coupling mirror is composed of a biconvex lens and a housing, and a thread groove is formed on the outer side wall of the end of the housing.

Preferably, the aperture size of the convex lens is larger than that of the concave lens, and the focal length of the convex lens is larger than that of the concave lens.

Preferably, the compensation mirror adopts an aspheric lens, a double-cemented lens, an air-gap double-cemented lens or a combination of the above lenses.

Preferably, the circulator adopts one of a fiber circulator and a space light circulator.

Preferably, the telescope device body includes beam expander and compensating mirror, the beam expander adopts the setting of Galileo formula beam expander, the beam expander comprises concave lens and convex lens.

Compared with the prior art, the universal telescope device for receiving and transmitting wind lidar has the advantages that:

1. the telescope device is suitable for wind measuring laser radars with two schemes of an optical fiber circulator and a space optical circulator simultaneously, solves the problems that the existing telescope device needs to be designed respectively and has no formed product, and realizes general design;

2. the collimating coupling mirror is arranged, the collimating coupling mirror can ensure the coupling efficiency of the light beam between the optical fiber and the telescope, and the coupling loss of the light beam at the interface between the end surface of the optical fiber and the telescope is reduced;

3. in the telescope device, because the light beam between the collimating coupling mirror and the beam expanding mirror is parallel light beam, the length of the distance can not affect the function of each lens, so that the length of the telescope can be controlled, and in the space light circulator, because the light beam emitted by the circulator is parallel light beam, the length of the distance between the circulator and the beam expanding mirror can not affect the telescope system;

4. the compensation mirror is arranged, so that the optical aberration of the telescope system can be reduced, and a good imaging effect is achieved;

in conclusion, the telescope device is suitable for wind measuring laser radars with two schemes of an optical fiber circulator and a space optical circulator by arranging the detachable collimating coupling mirror, the problems that the existing telescope device needs to be designed respectively and has no formed product are solved, the universal design is realized, the optical aberration of a telescope system is reduced by the compensating mirror, and the good imaging effect is achieved.

Drawings

FIG. 1 is a schematic structural diagram of a universal joint telescope device for wind lidar according to the present invention;

FIG. 2 is a schematic structural diagram of a wind lidar transceiver telescope device adapted to the optical fiber circulator scheme according to the present invention;

fig. 3 is a schematic structural diagram of a wind lidar transceiver telescope device adapted to a spatial optical circulator scheme provided by the utility model.

In the figure: the device comprises a circulator 1, a collimating coupling mirror 2, a beam expander 3, a compensator 4, a port 5, a biconvex lens 6, a concave lens 7, a convex lens 8 and a doublet cemented lens 9.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Example one

Referring to fig. 1-2, a universal wind lidar transceiver telescope device comprises a telescope device body, wherein the telescope device body is connected with a circulator 1, the telescope device body comprises a collimating coupling lens 2, a beam expander 3 and a compensating lens 4, and in order to meet the coherent detection requirement, the compensating lens (4) is composed of a lens or a lens combination for reducing system aberration, and the system aberration of the whole telescope can be controlled within lambda/4.

Be threaded connection between collimation coupling lens 2 and the beam expander lens 3 and set up, beam expander lens 3 adopts Galileo formula beam expander lens setting, and beam expander lens 3 comprises concave lens 7 and convex lens 8, and convex lens 8's aperture size is greater than concave lens 7's aperture size, and convex lens 8's focal length size is greater than concave lens 7's focal length size, has realized the facula compression of the beam expansion of emitted beam and received beam.

The collimating coupling mirror 2 is composed of a biconvex lens 6 and a shell, the outer side wall of the end part of the shell is provided with a thread groove, the compensating mirror 4 adopts a double-cemented lens 9 which is formed by cementing two lenses of H-K9L and ZF1, the light-passing aperture is 50.8mm, in order to meet the coherent detection requirement, the compensating mirror 4 controls the system aberration of the whole telescope in lambda/4, the collimating coupling mirror 2 is firstly installed on a beam expanding mirror 3, so that the telescope device is adapted to an optical fiber circulator, the end part of the optical fiber circulator is provided with a port 5, the inclination angle of the optical fiber end face at the port 5 is 8 degrees and is connected with one end of the collimating coupling mirror far away from the thread groove, so that in the transmitting process, a transmitted light beam has a certain divergence angle when the light beam is emitted from the optical fiber end face at the port 5 on the optical fiber circulator, and after passing through the collimating coupling mirror 2, the light beam is coupled to the telescope from the optical fiber and converted into a parallel light beam, the light spot radius of the parallel light beam is enlarged to 0.8 times of the aperture of the compensating mirror 4 through the beam expanding mirror 3 to achieve the best antenna efficiency and heterodyne efficiency, after passing through the compensating mirror 4, the aberration caused by the collimating coupling mirror 2 and the beam expanding mirror 3 is compensated, the light beam is focused and emitted to the atmosphere, in the receiving process, the echo light beam obtained by aerosol backscattering returns to the optical fiber circulator again after passing through the aberration compensation of the compensating mirror 4, the light spot compression of the beam expanding mirror 3 and the efficient coupling of the collimating coupling mirror 2, and is used for the beat frequency and signal processing of the local oscillator light beam in the later period.

Example two

Referring to fig. 3, the difference from the first embodiment is:

the telescope device body comprises a beam expanding lens 3 and a compensating lens 4, the beam expanding lens 3 is arranged by adopting a Galileo type beam expanding lens, the beam expanding lens 3 consists of a concave lens 7 and a convex lens 8, the compensating lens 4 adopts a double-cemented lens 9 which is formed by cementing two lenses of H-K9L and ZF1, the clear aperture is 50.8mm, in order to meet the coherent detection requirement, the compensating lens 4 controls the system aberration of the whole telescope in lambda/4, firstly, the collimating coupling lens 2 and the beam expanding lens 3 are disassembled, so that the telescope device is adapted to the space light circulator scheme, thereby, in the transmitting process, the light beam emitted from the space light circulator is parallel light beam, after the beam expanding by the beam expanding lens 3, the spot radius of the light beam is expanded to 0.8 times of the aperture of the compensating lens 4, so as to achieve the best antenna efficiency and heterodyne efficiency, after passing through the compensating lens 4, the aberration caused by the beam expanding lens 3 is compensated, in the light beam was focused and is launched the atmosphere, in the receiving process, because there is not the coupling problem between telescope and the optic fibre, the echo light beam that obtains by aerosol backscattering passes through the aberration compensation of compensating mirror 4 and the facula compression of beam expanding mirror 3 back, can directly enter into space light circulator, thereby through the installation dismantlement between collimation coupling mirror 2 and the beam expanding mirror 3, realized that this telescope device can be applicable to the anemometry laser radar of two kinds of schemes of optic fibre circulator and space light circulator simultaneously, solved current needs design respectively, the problem of no shaping product, general design has been realized.

Further, unless otherwise specifically stated or limited, the above-described fixed connection is to be understood in a broad sense, and may be, for example, welded, glued, or integrally formed as is conventional in the art.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and equivalent alternatives or modifications according to the technical solution of the present invention and the inventive concept thereof should be covered by the scope of the present invention.

Claims

1. The utility model provides a telescope device is put in receiving and dispatching of general anemometry lidar, includes telescope device body, its characterized in that, telescope device body is connected with circulator (1), telescope device body includes collimation coupling mirror (2), beam expanding lens (3) and compensating mirror (4), be threaded connection setting between collimation coupling mirror (2) and beam expanding lens (3), beam expanding lens (3) adopt Galileo formula beam expanding lens to set up, beam expanding lens (3) comprise concave lens (7) and convex lens (8).

2. The telescope device for universal transceiving according to claim 1, wherein the collimating coupling mirror (2) comprises a biconvex lens (6) and a housing, and the outer side wall of the end of the housing is provided with a thread groove.

3. The telescopic device of claim 1, wherein the aperture size of the convex lens (8) is larger than that of the concave lens (7), and the focal length of the convex lens (8) is larger than that of the concave lens (7).

4. The telescope device according to claim 1, wherein the compensating mirror is an aspheric lens, a double cemented lens (9), an air gap doublet, or a combination thereof.

5. The universal telescopic device for lidar transceiver of claim 1, wherein the circulator is one of a fiber optic circulator and a spatial light circulator.

6. The universal joint telescope device for wind lidar according to claim 1, wherein the telescope device body comprises a beam expander (3) and a compensator (4), the beam expander (3) is arranged in a galileo beam expander, and the beam expander (3) comprises a concave lens (7) and a convex lens (8).