Ultra-short large-aperture laser radar antenna

Abstract

The utility model discloses an ultra-short large-aperture laser radar antenna, and relates to the technical field of laser radar antennas. The device comprises a connecting base, one end of the connecting base is fixedly connected with an objective lens barrel, the interior of the objective lens barrel is in a step shape, the objective lens barrel is integrally in a horn shape, a first lens is installed in the end, close to the connecting base, of the objective lens barrel, a second lens is installed at the middle end of the objective lens barrel, and a third lens is installed on one side of the second lens in an attached mode. The radar antenna is provided with the connecting base, the objective lens barrel, the first lens, the second lens, the third lens and the fourth lens, through the combination mode of the four sets of lenses, the light path can be changed at short intervals in the short barrel, the length of the radar antenna is greatly shortened, meanwhile, the weight is reduced, installation and operation are convenient, and through the arrangement of the four refraction lenses, the radar antenna is more compact. Light can be refracted eight times through the four lenses.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of laser radar antenna, in particular to an extremely short large-aperture laser radar antenna. BACKGROUND

[0002] The laser radar wind measurement technology applies Doppler effect, emits a laser beam to the atmosphere, measures the frequency shift of the air suspended matter reflected laser beam to measure the wind speed, and is widely applied to real-time monitoring of atmospheric wind field.

[0003] The laser radar antenna is a key component for emitting and receiving a laser beam in a laser radar system. It is responsible for emitting the laser and receiving the reflected laser signal, and the laser radar can also be based on athermal design, so that the radar antenna maintains stable performance and high precision in a wide temperature range.

[0004] With the development of laser wind measurement radar technology, the integration of laser, controller and other components is higher and higher, and the volume of the laser radar antenna becomes a key factor limiting the volume of the laser wind measurement radar. At present, the traditional radar antenna is generally huge, and the length is usually 450mm. Whether it is installed or actually operated, it is very inconvenient, and the existing radar antenna usually does not have athermal design, which leads to poor environmental adaptability. Therefore, the application provides an extremely short large-aperture laser radar antenna. Practical new type content

[0005] The application aims to solve the problem that the traditional radar antenna is huge in volume, which leads to extremely inconvenient installation and operation. The application provides an extremely short large-aperture laser radar antenna.

[0006] In order to achieve the above purpose, the application specifically adopts the following technical scheme:

[0007] An extremely short large-aperture laser radar antenna comprises a connecting seat, one end of the connecting seat is fixedly connected with an objective lens barrel, the inside of the objective lens barrel is in a stepped shape, the objective lens barrel as a whole is in a horn shape, a lens one is installed in the inside of one end of the objective lens barrel close to the connecting seat, a lens two is installed in the middle end of the objective lens barrel, a lens three is attached and installed on one side of the lens two, a lens four is installed in the tail end of the objective lens barrel, a flange adjusting group is installed in the end of the objective lens barrel away from the connecting seat, and an optical fiber is installed in one end of the flange adjusting group.

[0008] By adopting the technical scheme, firstly, the lens four, the lens three, the lens two and the lens one are sequentially installed and fixed in the interior of the objective lens barrel, then the flange adjusting group and the optical fiber are installed at one end of the objective lens barrel, through the combination of the four lenses, the light path can be changed in a short distance in the short barrel, which greatly shortens the length of the radar antenna, reduces the weight, facilitates installation and operation, and through the setting of the four refractive lenses, the light passes through the four lenses to form eight times of refraction, and the light spot at the end of the flange adjusting group is emitted from the optical fiber interface, and the light is emitted parallelly through the objective lens to complete the wind measurement.

[0009] Further, the objective lens barrel is fixedly connected with an objective lens pressing ring one at the inner wall of one end close to the connecting seat, the inner wall of the objective lens pressing ring one is attached to one side of the lens one, the objective lens barrel is fixedly connected with an objective lens pressing ring two at the middle end, the inner wall of the objective lens pressing ring two is attached to one side of the lens two, and the objective lens barrel is fixedly connected with an objective lens pressing ring three at the end, and the inner wall of the objective lens pressing ring three is attached to one side of the lens four.

[0010] By adopting the technical scheme, the lens four is fixed at the end of the objective lens barrel by using the objective lens pressing ring three, the lens two and the lens three are fixed by using the objective lens pressing ring two, and the position of the lens one is fixed by using the objective lens pressing ring one.

[0011] Further, the outer wall of the flange adjusting group is provided with a threaded strip, the inner wall of one end of the objective lens barrel away from the connecting seat is provided with a threaded groove, and one end of the flange adjusting group is threadedly connected with one end of the objective lens barrel.

[0012] By adopting the technical scheme, the flange adjusting group is screwed into one end of the objective lens barrel, and is quickly installed and fixed at one end of the objective lens barrel through cooperation of the threaded strip and the threaded groove.

[0013] Further, the inner wall of the flange adjusting group is slidably connected with a contact ring, the inner wall of one end of the objective lens barrel away from the connecting seat is fixedly connected with a spring, and one end of the optical fiber is attached to one end of the contact ring.

[0014] By adopting the technical scheme, the spring is elastically extruded at one end of the contact ring, so that the optical fiber can be more stably arranged in the flange adjusting group, and the possibility of loosening and shaking of the optical fiber is reduced.

[0015] Further, the lens one and the lens two are arranged to be outwardly convex, and the lens three and the lens four are arranged to be flat concave lenses.

[0016] By adopting the technical scheme, the lens one and the lens two are arranged to be outwardly convex, and the lens three and the lens four are arranged to be flat concave lenses, so that the light can pass through the four lenses to be refracted eight times.

[0017] Further, the lens one, the lens two, the lens three and the lens four are all made of optical crystal.

[0018] By using the above technical scheme, the difference between the thermal characteristics of the optical material is used to eliminate the influence of temperature, thereby obtaining good effect and better realizing athermal design.

[0019] Further, the inner wall of the connecting seat is provided with a threaded port, and a plurality of through holes are uniformly and penetratingly arranged on one side of the connecting seat.

[0020] By using the above technical scheme, the threaded port can enable the connecting seat to be quickly connected with the radar base, and the plurality of through holes can also be inserted with threads for secondary fixation.

[0021] Further, the inside of each of the plurality of through holes is fixedly connected with a friction pad.

[0022] By using the above technical scheme, the friction pad can greatly improve the friction and sealing between the bolt and the through hole.

[0023] In summary, the present application includes at least one of the following beneficial effects:

[0024] 1. The present application is provided with a connecting seat, an objective lens barrel, a lens one, a lens two, a lens three and a lens four. Through the combination of four groups of lenses, the light path can be changed in a short tube with a short interval, greatly shortening the length of the radar antenna, reducing the weight, facilitating installation and operation, and enabling the light to be refracted eight times through the four lenses by using the arrangement of four refractive lenses.

[0025] 2. The present application is provided with a flange adjusting group, an optical fiber, a contact ring and a spring. The elasticity of the spring will press one end of the contact ring, so that the optical fiber can be more stably placed inside the flange adjusting group, reducing the possibility of the optical fiber loosening and shaking. The refracted light spot at the end of the flange adjusting group is emitted from the optical fiber interface, and the wind is measured by the objective lens. By adjusting the emission light spot of the optical fiber to coincide with the objective lens focal plane, the optical focal length change caused by temperature change is compensated, thereby reducing or eliminating the influence of environmental temperature change on the performance of the laser radar. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a perspective view of the device main body in the present application.

[0027] Figure 2 is a sectional view of the device main body in the present application.

[0028] Figure 3 is a bottom view of the device main body in the present application.

[0029] Figure 4 is a side view of the device body in the present application.

[0030] Reference signs:

[0031] 1, connecting seat; 2, objective barrel; 3, lens one; 4, lens two; 5, lens three; 6, lens four; 7, objective pressure ring one; 8, objective pressure ring two; 9, objective pressure ring three; 10, flange adjusting group; 11, optical fiber; 12, threaded bar; 13, abutting ring; 14, spring; 15, threaded port; 16, through hole; 17, friction pad. DETAILED DESCRIPTION

[0032] The following will be further explained in detail in combination with the accompanying Figure 1 drawings.

[0033] The embodiment of the present application discloses an extremely short large-aperture laser radar antenna.

[0034] Reference Figure 1 and Figure 2 , an extremely short large-aperture laser radar antenna, comprising a connecting seat 1, one end of the connecting seat 1 is fixedly connected with an objective barrel 2, the inside of the objective barrel 2 is in a stepped shape, the objective barrel 2 is in a whole horn shape, the inside of one end of the objective barrel 2 close to the connecting seat 1 is installed with a lens one 3, the middle end of the objective barrel 2 is installed with a lens two 4, one side of the lens two 4 is installed in close contact with a lens three 5, the tail end of the objective barrel 2 is installed with a lens four 6, the end of the objective barrel 2 away from the connecting seat 1 is installed with a flange adjusting group 10, one end of the flange adjusting group 10 is installed with an optical fiber 11, the inner wall of the one end of the objective barrel 2 close to the connecting seat 1 is fixedly connected with an objective pressure ring one 7, the inner wall of the objective pressure ring one 7 is in close contact with one side of the lens one 3, the middle end of the objective barrel 2 is fixedly connected with an objective pressure ring two 8, the inner wall of the objective pressure ring two 8 is in close contact with one side of the lens two 4, the tail end of the objective barrel 2 is fixedly connected with an objective pressure ring three 9, the inner wall of the objective pressure ring three 9 is in close contact with one side of the lens four 6.

[0035] In use, first, the lens four 6 is inserted into the end of the objective lens barrel 2, then the lens four 6 is fixed at the end of the objective lens barrel 2 by using the objective lens compression ring three 9, then the lens three 5 and the lens two 4 are sequentially inserted into the middle end of the objective lens barrel 2, and the lens two 4 and the lens three 5 are fixed by the objective lens compression ring two 8, finally the lens one 3 is inserted into the outermost side of the objective lens barrel 2, and the position of the lens one 3 is fixed by the objective lens compression ring one 7, when the lens one 3, the lens two 4, the lens three 5 and the lens four 6 are all installed, the connection seat 1 is used to be connected and fixed with the radar base, then the optical fiber 11 is placed in the flange adjusting group 10, and the flange adjusting group 10 is threadedly connected with one end of the objective lens barrel 2, so that the whole radar antenna is installed, through the combination of the four lenses, the light path can be changed in a short distance in the short barrel, which greatly shortens the length of the radar antenna, reduces the weight, is convenient for installation and operation, and through the setting of the four refractive lenses, the lens one 3 is arranged at the end of the objective lens barrel 2, the lens two 4 and the lens three 5 are arranged closely, so that the light passes through the four lenses to form eight times of refraction, the refracted light is emitted from the fiber 11 interface at the end of the flange adjusting group 10, and the emitted light spot is parallel to the objective lens to complete the wind measurement, and the flange adjusting group 10 can also adjust the emitted light spot of the optical fiber 11 to coincide with the objective lens focal plane to compensate the optical focal length change caused by temperature change, so as to reduce or eliminate the influence of environmental temperature change on the performance of the laser radar.

[0036] With reference to Figure 1 and Figure 2 The outer wall of the flange adjusting group 10 is provided with a threaded strip 12, the inner wall of the end of the objective lens barrel 2 away from the connection seat 1 is provided with a threaded groove, one end of the flange adjusting group 10 is threadedly connected with one end of the objective lens barrel 2, the inner wall of the flange adjusting group 10 is slidably connected with a contact ring 13, the inner wall of the end of the objective lens barrel 2 away from the connection seat 1 is fixedly connected with a spring 14, and one end of the optical fiber 11 is attached to one end of the contact ring 13.

[0037] In use, one end of the optical fiber 11 can be inserted into one end of the flange adjusting group 10, and one end of the optical fiber 11 is attached to one end of the contact ring 13, then the flange adjusting group 10 can be screwed into one end of the objective lens barrel 2, the flange adjusting group 10 is quickly installed and fixed at one end of the objective lens barrel 2 through the cooperation of the threaded strip 12 and the threaded groove, and when the flange adjusting group 10 is completely installed, one end of the spring 14 is in contact with one end of the contact ring 13, at this time, the spring 14 is elastically pressed against one end of the contact ring 13, so that the optical fiber 11 can be more stably placed in the flange adjusting group 10, and the possibility of loosening and shaking of the optical fiber 11 is reduced.

[0038] With reference to Figure 1 and Figure 2The lens one 3 and the lens two 4 are arranged to be convex to the outside, the lens three 5 and the lens four 6 are arranged to be flat-concave lenses, and the lens one 3, the lens two 4, the lens three 5 and the lens four 6 are all made of optical crystal.

[0039] In use, by arranging the lens one 3 and the lens two 4 to be convex to the outside and the lens three 5 and the lens four 6 to be flat-concave lenses, the light can pass through the four lenses for eight times of refraction, and the four lenses are all made of optical crystal, the difference between the thermal characteristics of the optical material is used to eliminate the influence of temperature, so that good effect is obtained, and the athermalization design can be better realized.

[0040] Referring to Figure 1 and Figure 3 The inner wall of the connecting seat 1 is provided with a threaded port 15, a plurality of through holes 16 are uniformly and penetratingly arranged on one side of the connecting seat 1, and a friction pad 17 is fixedly connected in the plurality of through holes 16.

[0041] In use, the threaded port 15 can enable the connecting seat 1 to be quickly connected with the radar base, the plurality of through holes 16 can also be inserted with threads for secondary fixation, and the friction pad 17 can greatly improve the friction and sealing between the bolt and the through hole 16.

[0042] The implementation principle of the extremely short large-diameter laser radar antenna of the embodiment is as follows: in use, first, the lens four 6 is inserted into the end of the objective lens barrel 2, then the lens four 6 is fixed at the end of the objective lens barrel 2 by using the objective lens pressing ring three 9, then the lens three 5 and the lens two 4 are sequentially inserted into the middle end of the objective lens barrel 2, and the lens two 4 and the lens three 5 are fixed by the objective lens pressing ring two 8, finally the lens one 3 is inserted into the outermost side of the objective lens barrel 2, and the position of the lens one 3 is fixed by the objective lens pressing ring one 7, when the lens one 3, the lens two 4, the lens three 5 and the lens four 6 are all installed, the connecting seat 1 can be quickly connected with the radar base through the threaded hole 15, and the threaded hole 16 can be inserted into the screw for secondary fixation, and the friction between the bolt and the threaded hole 16 and the sealing property can be greatly improved by the friction pad 17, then one end of the optical fiber 11 is inserted into one end of the flange adjusting group 10, and the one end of the optical fiber 11 is in abutment with the one end of the abutment ring 13, then the flange adjusting group 10 is screwed into one end of the objective lens barrel 2, the flange adjusting group 10 is quickly installed and fixed at one end of the objective lens barrel 2 by the cooperation of the threaded strip 12 and the threaded groove, and when the flange adjusting group 10 is completely installed, the one end of the spring 14 abuts against the one end of the abutment ring 13, at this time, the one end of the abutment ring 13 is pressed by the elasticity of the spring 14, so that the optical fiber 11 can be more stably arranged in the flange adjusting group 10, and the possibility of loosening and shaking of the optical fiber 11 is reduced, so that the overall installation of the radar antenna is completed.

[0043] By the combination of the four groups of lenses, the light path can be changed in a short distance in the short barrel, the length of the radar antenna is greatly shortened, the weight is reduced, the installation and operation are facilitated, and by arranging the four refractive lenses, the lens one 3 and the lens two 4 are arranged as the outer convex lenses, the lens three 5 and the lens four 6 are arranged as the flat concave lenses, the lens one 3 is arranged at the end of the objective lens barrel 2, the lens two 4 and the lens three 5 are arranged in close proximity, the light passes through the four lenses to form eight times of refraction, the emitted light spot of the optical fiber 11 at the end of the flange adjusting group 10 is parallel to the objective lens to complete the wind measurement, and the flange adjusting group 10 can also adjust the emitted light spot of the optical fiber 11 to coincide with the objective lens focal plane to compensate for the change of the optical focal length caused by the temperature change, so as to reduce or eliminate the influence of the environmental temperature change on the performance of the laser radar.

Claims

1. A very short large aperture lidar antenna comprising a connection seat (1), characterized in that: One end of the connecting seat (1) is fixedly connected with an objective lens barrel (2), the inside of the objective lens barrel (2) is stepped, the objective lens barrel (2) is trumpet-shaped as a whole, a lens one (3) is installed in the inside of the end of the objective lens barrel (2) close to the connecting seat (1), a lens two (4) is installed in the middle end of the objective lens barrel (2), a lens three (5) is attached to one side of the lens two (4), a lens four (6) is installed in the end of the objective lens barrel (2), a flange adjusting group (10) is installed in the end of the objective lens barrel (2) away from the connecting seat (1), and an optical fiber (11) is installed in one end of the flange adjusting group (10).

2. A very short large aperture ladar antenna according to claim 1, wherein: The inner wall of the end of the objective lens barrel (2) close to the connecting seat (1) is fixedly connected with an objective lens pressing ring one (7), the inner wall of the objective lens pressing ring one (7) is attached to one side of the lens one (3), the middle end of the objective lens barrel (2) is fixedly connected with an objective lens pressing ring two (8), the inner wall of the objective lens pressing ring two (8) is attached to one side of the lens two (4), and the end of the objective lens barrel (2) is fixedly connected with an objective lens pressing ring three (9). The inner wall of the objective lens pressing ring three (9) is attached to one side of the lens four (6).

3. A very short large aperture ladar antenna according to claim 1, wherein: The outer wall of the flange adjusting group (10) is provided with a threaded strip (12), the inner wall of the end of the objective lens barrel (2) away from the connecting seat (1) is provided with a threaded groove, and one end of the flange adjusting group (10) is threadedly connected with one end of the objective lens barrel (2).

4. A very short large aperture ladar antenna according to claim 1, wherein: The inner wall of the flange adjusting group (10) is slidably connected with a contact ring (13), the inner wall of the end of the objective lens barrel (2) away from the connecting seat (1) is fixedly connected with a spring (14), and one end of the optical fiber (11) is attached to one end of the contact ring (13).

5. A very short large aperture ladar antenna according to claim 1, wherein: The lens one (3) and the lens two (4) are provided as outwardly convex, and the lens three (5) and the lens four (6) are provided as flat concave lenses.

6. A very short large aperture ladar antenna according to claim 1, wherein: The lens one (3), the lens two (4), the lens three (5) and the lens four (6) are all made of optical crystal.

7. A very short large aperture ladar antenna according to claim 1, wherein: The inner wall of the connecting seat (1) is provided with a threaded port (15), and a plurality of through holes (16) are uniformly and penetratively arranged on one side of the connecting seat (1).

8. A very short large aperture ladar antenna according to claim 7, wherein: The inside of each of the plurality of through holes (16) is fixedly connected with a friction pad (17).

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