Coaxial transceiving long-focus collimator

Abstract

The utility model provides a coaxial transmitting-receiving long-focus collimator. The coaxial transmitting-receiving long-focus collimator comprises a barrel, an adjusting barrel and an expansion lens seat which are communicated in sequence, an air gap doublet lens is arranged in the cylinder body; one end of the expansion lens seat is connected with one end, far away from the cylinder body, of the adjusting cylinder, and the other end of the expansion lens seat is used for being connected with an optical fiber connector; one end of the adjusting cylinder is in threaded connection with the cylinder body, the other end of the adjusting cylinder is fixedly connected with the expansion lens base, and the adjusting cylinder is used for adjusting the distance between the air gap doublet lens and the micro expansion lens so as to obtain an emergent light beam meeting a preset condition. The central point of the micro expansion lens and the central point of the air gap doublet lens are located on the same straight line and are spaced by a first preset distance. According to the invention, the receiving efficiency is improved, the same-optical-axis receiving and transmitting function is realized, the collimation and the transmission distance are improved, the application range is widened, and the device has important practical value and market potential.

Description

Technical Field

[0001] The present application relates to the field of optical technology, and in particular to a coaxial transceiver telephoto collimator. Background Art

[0002] The fiber collimator is made of a pigtail fiber and a self-focusing lens that are precisely positioned. It can convert the transmitted light in the fiber into collimated light (parallel light), or couple external parallel (approximately parallel) light into a single-mode fiber.

[0003] However, existing fiber optic collimators generally use FC / APC fiber optic connectors (2.2mm wide key), FC / PC fiber optic connectors (2.2mm wide key) or SMA fiber optic connectors, which can cover the wavelength range of 405nm to 2μm, and achieve diffraction-limited performance through component lens design. However, due to the chromatic aberration of the lens, its effective focal length (EFL) will be different at different wavelengths, affecting the collimation effect of the light beam. In addition, the packaging structure mostly uses aviation aluminum black material. Although it has good mechanical properties and stability, the coupling efficiency of spatial light is still low, which limits its use in high-precision and high-efficiency application scenarios. Based on this, the present application provides a coaxial transceiver telephoto collimator. Utility Model Content

[0004] The present application provides a coaxial transceiver telephoto collimator to solve the technical problems described in the above background technology.

[0005] In order to solve the above technical problems, this application adopts the following technical solutions:

[0006] The present application provides a coaxial transceiver telephoto collimator, comprising: a barrel, an adjustment barrel and an expansion lens seat connected in sequence;

[0007] An air gap doublet lens is arranged in the cylinder;

[0008] A micro-capacitance expansion lens is arranged in the expansion lens seat, one end of the expansion lens seat is connected to the end of the adjustment tube away from the tube body and the other end is used to connect to the optical fiber connector;

[0009] One end of the adjustment cylinder is threadedly connected to the cylinder body, and the other end is fixedly connected to the expansion lens holder, and is used to adjust the distance between the air gap doublet lens and the micro expansion lens to obtain an outgoing light beam that meets preset conditions;

[0010] Wherein, the center point of the micro-expanded lens and the center point of the air-gap doublet lens are located on the same straight line and the distance between the two is a first preset distance.

[0011] Optionally, the cylinder comprises a first horizontal section, a convergent section and a second horizontal section which are connected in sequence;

[0012] A first external thread is provided on the outer circumferential wall of one end of the second horizontal section away from the convergent section, a first internal thread matching the first external thread is provided on the inner circumferential wall of one end of the adjustment tube away from the expansion lens seat, and the air gap doublet lens is arranged in the first horizontal section.

[0013] Optionally, the air-gap doublet lens comprises a first lens and a second lens;

[0014] The first lens and the second lens are arranged in the barrel along the length direction of the barrel and are spaced apart by a second preset distance. The first lens and the second lens are sequentially close to the adjustment barrel.

[0015] Optionally, the second preset distance is 2.7 mm to 3.5 mm.

[0016] Optionally, both the first lens and the second lens are made of N-SF6 material.

[0017] Optionally, the first lens is semi-convex, and the thickness of the first lens is 3.8 mm to 4.2 mm;

[0018] The second lens is meniscus-shaped, and the thickness of the second lens is 2.3 mm to 3.1 mm.

[0019] Optionally, the outer diameter of the air-gap doublet lens is 4.7 to 5.2 times the outer diameter of the micro-expansion lens.

[0020] Optionally, the micro-expansion lens is made of fused quartz or optical glass material;

[0021] The thickness of the micro-expanded lens is 5.7 mm to 6.3 mm.

[0022] Optionally, a second external thread is provided on an outer peripheral wall of the end of the expansion lens seat away from the adjustment tube, and a second internal thread matching the second external thread is provided in the optical fiber connector.

[0023] Optionally, a flange is provided at one end of the adjustment tube close to the expansion lens seat, and the flange is used to mount the adjustment tube on an adjustment frame.

[0024] The coaxial transceiver telephoto collimator provided by the present application comprises a cylinder, an adjustment cylinder and an expansion lens seat which are connected in sequence, an optical fiber connector connected to the end of the expansion lens seat away from the adjustment cylinder, an air gap doublet lens arranged in the cylinder, and a micro-expansion lens arranged in the expansion lens seat. The arrangement of the micro-expansion lens retains the diffraction limit performance of the original multi-element lens, and can more effectively capture and converge the light beam from the free space, so that it can be better coupled into the optical fiber, thereby significantly improving the receiving efficiency of the spatial light. In addition, since the center point of the micro-expanded capacity lens and the center point of the air-gap doublet lens are located on the same straight line, the air-gap doublet lens and the micro-expanded capacity lens are in a coaxial state, so that the coaxial transceiver telephoto collimator in the present application can transmit the light beam in the optical fiber in a highly efficient manner while receiving the light beam from the free space, thereby realizing the integrated transceiver function, greatly improving the system's integration and ease of use, and since the center point of the micro-expanded capacity lens and the center point of the air-gap doublet lens are at a first preset distance, a telephoto collimation effect is achieved, and the telephoto is not only beneficial to reducing the divergence angle of the light beam and improving the collimation of the light beam, but also can increase the transmission distance to a certain extent, meeting the needs of long-distance communication and measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 A schematic diagram of the structure of a coaxial transceiver telephoto collimator provided in one embodiment of the present application;

[0027] Figure 2 A schematic diagram of a structure in which an air gap doublet lens is arranged in a cylinder and a micro-capacity expansion lens is installed in a capacity expansion lens seat provided in an embodiment of the present application;

[0028] Figure 3 A schematic diagram of the collimation effect of a coaxial transceiver telephoto collimator provided in one embodiment of the present application.

[0029] In the figure: 100, cylinder; 101, air gap doublet lens; 1011, first lens; 1012, second lens; 102, first horizontal section; 103, convergent section; 104, second horizontal section; 1041, first external thread; 200, adjustment cylinder; 201, flange; 300, expansion lens holder; 301, micro expansion lens; 302, second external thread; 400, optical fiber connector. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application is clearly and completely described below. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work also fall within the scope of protection of the present application.

[0031] refer to Figures 1 to 3 The present application provides a coaxial transceiver telephoto collimator, comprising: a barrel 100, an adjustment barrel 200 and an expansion lens holder 300 connected in sequence; wherein the expansion lens holder 300 is in a barrel shape, which is convenient for installing the expansion lens therein and for connecting the expansion lens holder 300 with the adjustment barrel 200.

[0032] An air gap doublet lens 101 is disposed in the barrel 100 ; wherein the air gap doublet lens 101 in the present application is mainly used for collimation, focusing, and the like.

[0033] A micro-capacity expansion lens 301 is arranged in the capacity expansion lens holder 300, one end of the capacity expansion lens holder 300 is connected to the end of the adjustment tube 200 away from the tube body 100 and the other end thereof is used to connect to the optical fiber connector 400; wherein, the setting of the micro-capacity expansion lens 301 retains the diffraction limit performance of the original multi-element lens, and can more effectively capture and converge the light beam from the free space, so that it can be better coupled into the optical fiber, thereby significantly improving the receiving efficiency of the spatial light.

[0034] One end of the adjustment tube 200 is threadedly connected to the tube body 100, and the other end thereof is fixedly connected to the expansion lens holder 300, and is used to adjust the distance between the air gap doublet lens 101 and the micro expansion lens 301 to obtain an output light beam that meets preset conditions; wherein the center point of the micro expansion lens 301 and the center point of the air gap doublet lens 101 are located on the same straight line and the distance between the two is a first preset distance (wherein the first preset distance is 57mm to 61mm). Since the center point of the micro-expanded capacity lens 301 and the center point of the air-gap doublet lens 101 are located on the same straight line, the air-gap doublet lens 101 and the micro-expanded capacity lens 301 are in a coaxial state, so that the coaxial transceiver telephoto collimator in the present application can quickly transmit the light beam in the optical fiber while receiving the light beam from the free space, thereby realizing the function of integrated transceiver, greatly improving the integration and ease of use of the system, and since the center point of the micro-expanded capacity lens 301 and the center point of the air-gap doublet lens 101 are at a first preset distance (wherein the first preset distance is 57 mm to 61 mm), a telephoto collimation effect is achieved, and the telephoto is not only conducive to reducing the divergence angle of the light beam and improving the collimation of the light beam, but also can increase the transmission distance to a certain extent, meeting the needs of long-distance communication and measurement.

[0035] The coaxial transceiver telephoto collimator provided in the present application is made by sequentially connecting a barrel 100, an adjustment barrel 200 and an expansion lens holder 300, connecting an optical fiber connector 400 at the end of the expansion lens holder 300 away from the adjustment barrel 200, an air gap doublet lens 101 arranged in the barrel 100, and a micro expansion lens 301 arranged in the expansion lens holder 300, and utilizes the refraction and reflection principles of optical fibers to transmit and modulate optical signals. When light enters the port of the coaxial transceiver telephoto collimator in the present application, refraction and reflection will occur, causing the light to be deflected and scattered, thereby realizing the transmission and modulation of optical signals.

[0036] Depend on Figure 3 It can be seen that the coaxial transceiver telephoto collimator provided in the present application realizes the function of a high-efficiency coaxial transceiver collimator through the optical design and structural layout such as the setting of the air gap doublet lens 101 and the micro-expansion lens 301 and the positional relationship between the two. It not only improves the receiving efficiency, realizes the co-axial transceiver function, improves the collimation and transmission distance, but also broadens the scope of application, and has important practical value and market potential.

[0037] In some embodiments, reference Figure 1 and Figure 2 The barrel 100 in the present application includes a first horizontal section 102, a convergent section 103 and a second horizontal section 104 which are connected in sequence; specifically, a first external thread 1041 is provided on the outer peripheral wall of the end of the second horizontal section 104 away from the convergent section 103, and a first internal thread matching the first external thread 1041 is provided on the inner peripheral wall of the end of the adjustment barrel 200 away from the expansion lens seat 300, and the air gap doublet lens 101 is arranged in the first horizontal section 102.

[0038] In the above embodiment, the first internal thread on the adjustment tube 200 and the first external thread 1041 on the second horizontal section 104 are arranged so that the distance between the second horizontal section 104 and the expansion lens seat 300 can be adjusted by turning the knob of the adjustment tube 200, so that the distance between the micro-expansion lens 301 arranged in the expansion lens seat 300 and the air gap doublet lens 101 in the first horizontal section 102 can be adjusted, thereby adjusting the focal length, thereby improving the applicability of the coaxial transceiver telephoto collimator provided by the present application. In addition, the first horizontal section 102 and the convergent section 103 facilitate the divergence of the optical fiber through the air gap doublet lens 101 to the micro-expansion lens 301, and the arrangement of the second horizontal section 104 facilitates the installation of the adjustment tube 200 and the second horizontal section 104.

[0039] In some embodiments, reference Figure 2The air-gap doublet lens 101 in the present application includes a first lens 1011 and a second lens 1012; specifically, the first lens 1011 and the second lens 1012 are arranged in the barrel 100 along the length direction of the barrel 100 and are separated by a second preset distance (which can be set according to actual needs, so the present application does not make specific limitations on it here), and the first lens 1011 and the second lens 1012 are successively close to the adjustment barrel 200.

[0040] In the above embodiment, the setting of the second preset distance between the first lens 1011 and the second lens 1012 included in the air-gap doublet lens 101 improves the mechanical strength and durability of the lens system and provides more freedom for optical design to optimize the overall performance.

[0041] In some embodiments, the second preset distance in the present application is 2.7 mm to 3.5 mm. The second preset distance is within the above numerical range, which can ensure the mechanical strength and durability of the first lens 1011 and the second lens 1012, and provide more freedom for optical design to optimize the overall performance. The specific value of the second preset distance can be set according to actual needs. Therefore, the present application does not make specific limitations on it.

[0042] In some embodiments, the first lens 1011 and the second lens 1012 in the present application are made of N-SF6 material, so that the first lens 1011 and the second lens 1012 not only have high precision and excellent surface quality, but also have wide applicability and significant cost-effectiveness. At the same time, its chemical stability also provides a guarantee for its performance in optical applications.

[0043] In some embodiments, reference Figure 2 The first lens 1011 in the present application is semi-convex, mainly used to minimize spherical aberration. The semi-convex first lens 1011 controls light by focusing or diverging it, and can shorten the focal length without introducing obvious spherical aberration, increase the numerical aperture (NA) of the system, which enables the system to work more efficiently when converging collimated light. The thickness of the first lens 1011 is 3.8mm to 4.2mm, so that the focusing and diverging light can be controlled, ensuring the focusing performance of the coaxial transceiver telephoto collimator in the present application.

[0044] The second lens 1012 is meniscus-shaped and is used to further optimize the aberration correction in the optical system. When used in combination with the semi-convex first lens 1011, the meniscus-shaped second lens 1012 can effectively compensate for the aberration introduced by the semi-convex first lens 1011, thereby achieving higher imaging quality. In addition, the meniscus-shaped second lens 1012 can also reduce chromatic aberration and improve image clarity and color reproduction. The thickness of the second lens 1012 is 2.3 mm to 3.1 mm, so that the focusing and diverging light can be controlled, ensuring the focusing performance of the coaxial transceiver telephoto collimator in this application.

[0045] In some embodiments, the outer diameter of the air gap doublet lens 101 in the present application is 4.7 to 5.2 times the outer diameter of the micro-expansion lens 301, which helps to achieve better installation compatibility, optimize optical performance, improve spot size accuracy, and enhance transmittance within a specific wavelength range, thereby improving the performance and application range of the overall optical system.

[0046] In some embodiments, the micro-expansion lens 301 in the present application is made of fused quartz or optical glass material; wherein, the micro-expansion lens 301 has beam focusing and imaging, beam shaping and averaging, high time resolution and wide viewing angle, infinite depth of field and high-throughput imaging, high photoelectric performance, as well as high optical diffraction efficiency and good dispersion performance, etc. Its specific material can be set according to actual needs, therefore, the present application does not make specific limitations on it here.

[0047] In addition, the thickness of the micro-capacity expansion lens 301 is 5.7 mm to 6.3 mm, which can ensure micro-capacity expansion. Within this value range, the micro-capacity expansion lens 301 can not only ensure the rigidity of the micro-capacity expansion lens 301, but also ensure the focusing ability of the micro-capacity expansion lens 301, thereby ensuring the collimation effect of the coaxial transceiver telephoto collimator provided by the present application. Therefore, the specific thickness value of the micro-capacity expansion lens 301 can be set according to actual needs, and therefore, the present application does not specifically limit it here.

[0048] In some embodiments, reference Figure 2 In the present application, a second external thread 302 is provided on the outer peripheral wall of the end of the expansion lens holder 300 away from the adjustment tube 200, and a second internal thread matching the second external thread 302 is provided in the optical fiber connector 400. The second external thread 302 and the second internal thread are provided to facilitate installation of the optical fiber connector 400 on the expansion lens holder 300 or separation of the optical fiber connector 400 from the expansion lens holder 300, and facilitate storage and convenience of use.

[0049] In some embodiments, reference Figure 1 and Figure 2In the present application, a flange 201 is provided at one end of the adjustment tube 200 close to the expansion lens seat 300. The flange 201 is used to install the adjustment tube 200 on the adjustment frame, thereby improving the convenience of using the coaxial transceiver telephoto collimator.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, ordinary technicians in the field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A coaxial transceiver telephoto collimator, characterized in that: include: A barrel (100), an adjustment barrel (200), and a capacity expansion lens seat (300) which are connected in sequence; An air gap doublet lens (101) is arranged in the cylinder (100); A micro-capacity expansion lens (301) is arranged in the capacity expansion lens seat (300); one end of the capacity expansion lens seat (300) is connected to an end of the adjustment tube (200) away from the tube body (100), and the other end is used to connect to the optical fiber connector (400); One end of the adjustment tube (200) is threadedly connected to the tube body (100), and the other end is fixedly connected to the expansion lens seat (300), and is used to adjust the distance between the air gap doublet lens (101) and the micro expansion lens (301) to obtain an output light beam that meets preset conditions; The center point of the micro-expanded lens (301) and the center point of the air-gap doublet lens (101) are located on the same straight line and are separated by a first preset distance.

2. The coaxial transceiver telephoto collimator according to claim 1, characterized in that: The cylinder (100) comprises a first horizontal section (102), a convergent section (103) and a second horizontal section (104) which are connected in sequence; A first external thread (1041) is provided on the outer peripheral wall of the end of the second horizontal section (104) away from the convergent section (103), a first internal thread matching the first external thread (1041) is provided on the inner peripheral wall of the end of the adjustment tube (200) away from the expansion lens seat (300), and the air gap doublet lens (101) is arranged in the first horizontal section (102).

3. The coaxial transceiver telephoto collimator according to claim 2, characterized in that: The air-gap doublet lens (101) comprises a first lens (1011) and a second lens (1012); The first lens (1011) and the second lens (1012) are arranged in the barrel (100) along the length direction of the barrel (100) and are spaced apart by a second preset distance. The first lens (1011) and the second lens (1012) are sequentially close to the adjustment barrel (200).

4. The coaxial transceiver telephoto collimator according to claim 3, characterized in that: The second preset distance is 2.7 mm to 3.5 mm.

5. The coaxial transceiver telephoto collimator according to claim 3, characterized in that: The first lens (1011) and the second lens (1012) are both made of N-SF6 material.

6. The coaxial transceiver telephoto collimator according to claim 3, characterized in that: The first lens (1011) is semi-convex, and the thickness of the first lens (1011) is 3.8 mm to 4.2 mm; The second lens (1012) is meniscus-shaped, and the thickness of the second lens (1012) is 2.3 mm to 3.1 mm.

7. The coaxial transceiver telephoto collimator according to claim 1, characterized in that: The outer diameter of the air-gap doublet lens (101) is 4.7 to 5.2 times the outer diameter of the micro-expanded lens (301).

8. The coaxial transceiver telephoto collimator according to claim 1, characterized in that: The micro-capacitance expansion lens (301) is made of fused quartz or optical glass material; The thickness of the micro-expanded lens (301) is 5.7 mm to 6.3 mm.

9. The coaxial transceiver telephoto collimator according to any one of claims 1 to 8, characterized in that: A second external thread (302) is provided on the outer peripheral wall of the end of the expansion lens seat (300) away from the adjustment tube (200), and a second internal thread matching the second external thread (302) is provided in the optical fiber connector (400).

10. The coaxial transceiver telephoto collimator according to any one of claims 1 to 8, characterized in that: A flange (201) is provided at one end of the adjustment tube (200) close to the expansion lens seat (300), and the flange (201) is used to install the adjustment tube (200) on an adjustment frame.

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