Testing device

Abstract

The utility model discloses a testing device which is used for testing an optical fiber preform and comprises a shell and at least two testing parts, a matching medium is contained in the shell, an installation opening is formed in the shell, the optical fiber preform is guided into the matching medium through the installation opening, and the optical fiber preform is arranged in the shell. The matching medium can be completely immersed in a test point on the optical fiber preform. Each test part can emit laser, penetrate through the matching medium in the shell and is used for irradiating a test point on the optical fiber preform to form a laser light path, and the laser light paths of the two test parts are used for intersecting at the test point. Furthermore, the same point of the optical fiber preform can be measured at different angles, and the diameter and the optical performance of the optical fiber preform can be calculated according to the refractive index of the matched medium.

Description

Technical Field

[0001] The utility model relates to the technical field of optical parameter testing of optical fiber preforms, in particular to a testing device. Background Art

[0002] The optical fiber preform includes a core layer and an outer cladding layer. The optical parameters and geometric parameters of each layer of the preform material need to be tested by analytical instruments. Qualified optical fiber preforms are made into optical fibers through a drawing process. The various parameters of the optical fiber preform will directly affect the various indicators of the optical fiber production. Testing the various parameters of the optical fiber preform is a conventional means to predict the quality of the optical fiber production, which greatly improves the efficiency and quality of optical fiber production. The optical fiber preform is immersed in a medium for testing. During the test, the output light of the instrument enters the medium and is transmitted to the surface of the preform. Due to the difference in refractive index between the preform and the medium, when the light is incident from the medium to the preform and emitted from the preform to the medium, the light will be refracted and finally received by the detection part.

[0003] Existing testing and analysis instruments need to test various parameters of optical fiber preform at different angles. The angle of rotation of the preform is controlled by a rotating fixture, and data of only one angle is measured each time. The test efficiency is low, and the number of tested angles is small. Due to the rotation of the fixture, there is an error between the test result and the actual result. Utility Model Content

[0004] To achieve the above purpose, the testing device proposed by the utility model includes:

[0005] a housing containing a matching medium, wherein the housing is formed with an installation opening, wherein the installation opening is used for introducing the optical fiber preform into the matching medium, and within the housing, the matching medium can completely immerse a test point disposed on the optical fiber preform; and

[0006] At least two test parts, each of which can emit laser light through the matching medium in the shell and irradiate the test point on the optical fiber preform to form a laser light path, and the laser light paths of the two test parts are used to intersect at the test point.

[0007] In one embodiment, the testing device further comprises a vibration reduction device, and the vibration reduction device is arranged between the support body and the weighing sensor.

[0008] In one embodiment, the testing unit comprises:

[0009] an emitting unit capable of emitting laser light and located on the laser light path; and

[0010] The receiving part is capable of receiving laser light and is located on the laser light path. The receiving part and the transmitting part are located on opposite sides of the shell.

[0011] In one embodiment, the shell includes a shell body and a window provided on the shell body, the window is located on the laser light path, and a light-transmitting plate is provided at the window.

[0012] In one embodiment, the housing has an upper shell section and a lower shell section, wherein:

[0013] The upper shell section is arranged in a rhombus shape, and the laser light path passes through the upper shell section; and / or,

[0014] The lower shell section is arranged in a cylindrical shape.

[0015] In one embodiment, the cavity cross-sectional area of ​​the upper shell segment is greater than the cavity cross-sectional area of ​​the lower shell segment.

[0016] In one embodiment, the laser light paths of the at least two testing parts are in the same horizontal plane.

[0017] In one embodiment, a dust cover is provided at the installation opening, and an adapting hole is provided on the dust cover for adapting the optical fiber preform.

[0018] In one embodiment, a filter pipeline is also formed on the test device, and a filter and / or a pressure pump is provided on the filter pipeline. The inlet of the filter pipeline is connected to the lower end of the cavity of the shell, and the outlet is connected to the upper end of the cavity of the shell.

[0019] In one embodiment, the testing device further comprises:

[0020] Frame;

[0021] a sliding portion that slides in an up-down direction relative to the frame; and

[0022] A fixing assembly is used for detachably fixing the optical fiber preform on the sliding part.

[0023] In one embodiment, the testing device further comprises:

[0024] A sliding block extending in the second direction, the sliding block comprising a matching sliding end and a fixed clamping end, the matching sliding end being connected to a slide rail provided on the frame body in an up-and-down sliding manner;

[0025] a rotatable clamping portion, rotatably mounted on the sliding block, for clamping the optical fiber preform together with the fixed clamping end; and

[0026] A threaded member, used for threadingly connecting the rotating clamping portion and the sliding block;

[0027] The sliding portion includes the sliding block and the rotating clamping portion, and the fixing assembly includes the screw member.

[0028] In one embodiment, the testing device further comprises a heating unit for heating the optical fiber preform; and / or,

[0029] The testing part includes a receiving part, and the testing device also includes an analyzing component, and the analyzing component is electrically connected to the receiving part.

[0030] In the technical solution provided by the utility model, a testing device is proposed, including a shell and at least two testing parts, wherein the shell contains a matching medium, and the shell forms an installation port, wherein the installation port is used for the optical fiber preform to be introduced into the matching medium, and within the shell, the matching medium can completely immerse the test point arranged on the optical fiber preform. Each of the testing parts can emit a laser and pass through the matching medium in the shell, and is used to irradiate the test point on the optical fiber preform to form a laser light path, and the laser light paths of the two testing parts are used to intersect at the test point. Furthermore, the same point of the optical fiber preform can be measured at different angles at the same time, and then the diameter and optical performance of the optical fiber preform can be calculated according to the refractive index of the matching medium. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0032] Figure 1 A three-dimensional structural schematic diagram of an embodiment of a testing device provided by the utility model;

[0033] Figure 2 for Figure 1 Top view of the test setup in .

[0034] Description of Figure Numbers:

[0035]

[0036]

[0037] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0039] It should be noted that if there are directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention, the directional indications are only used to explain the position of the user in a certain posture (such as the attached Figure 1 The relative position relationship, movement status, etc. between the various components under the specific posture are shown. If the specific posture changes, the directional indication will also change accordingly.

[0040] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0041] The optical fiber preform includes a core layer and an outer cladding layer. The optical parameters and geometric parameters of each layer of the preform material need to be tested by analytical instruments. Qualified optical fiber preforms are made into optical fibers through a drawing process. The various parameters of the optical fiber preform will directly affect the various indicators of the optical fiber production. Testing the various parameters of the optical fiber preform is a conventional means to predict the quality of the optical fiber production, which greatly improves the efficiency and quality of optical fiber production. The optical fiber preform is immersed in a medium for testing. During the test, the output light of the instrument enters the medium and is transmitted to the surface of the preform. Due to the difference in refractive index between the preform and the medium, when the light is incident from the medium to the preform and emitted from the preform to the medium, the light will be refracted and finally received by the detection part.

[0042] Existing testing and analysis instruments need to test various parameters of optical fiber preform at different angles. The angle of rotation of the preform is controlled by a rotating fixture, and data of only one angle is measured each time. The test efficiency is low, and the number of tested angles is small. Due to the rotation of the fixture, there is an error between the test result and the actual result.

[0043] In view of this, the utility model provides a testing device. Figure 1 to Figure 2 is a schematic diagram of an embodiment of the testing device.

[0044] See also Figure 1 The testing device 100 includes a housing and at least two testing parts 2. The housing contains a matching medium 5. The housing is formed with an installation port, and the installation port is used for the optical fiber preform 3 to be introduced into the matching medium 5. In the housing, the matching medium 5 can completely immerse the test point on the optical fiber preform 3. Each of the testing parts 2 can emit a laser and pass through the matching medium 5 in the housing to irradiate the test point on the optical fiber preform 3 to form a laser light path. The laser light paths of the two testing parts 2 are used to intersect at the test point.

[0045] In the technical solution provided by the utility model, a testing device 100 is proposed, which includes a shell and at least two testing parts 2, wherein the shell contains a matching medium 5, and the shell is formed with an installation port, wherein the installation port is used for the optical fiber preform 3 to be introduced into the matching medium 5, and within the shell, the matching medium 5 can completely immerse the test point arranged on the optical fiber preform 3. Each of the testing parts 2 can emit a laser and pass through the matching medium 5 in the shell, and is used to irradiate the test point on the optical fiber preform 3 to form a laser light path, and the laser light paths of the two testing parts 2 are used to intersect at the test point. Furthermore, the same point of the optical fiber preform 3 can be measured at different angles at the same time, and then the diameter and optical performance of the optical fiber preform 3 can be calculated according to the refractive index of the matching medium 5.

[0046] There is no limitation on the position of the test point of the optical fiber preform 3 , and any point on the optical fiber preform 3 immersed in the matching medium 5 can be identified as the test point.

[0047] In this embodiment, the test part 2 includes a transmitter 21 and a receiver 22. The transmitter 21 can transmit laser light and is located on the laser light path, and the receiver 22 can receive laser light and is located on the laser light path, and the receiver 22 and the transmitter 21 are located on opposite sides of the housing. The transmitter 21 emits laser light to the test point, and the receiver 22 can receive laser light reflected by the optical fiber preform 3 on the opposite side of the transmitter 21.

[0048] Further, the test device 100 further includes a heating unit for heating the optical fiber preform 3; and / or the test unit 2 includes a receiving unit 22, and the test device 100 further includes an analysis component, which is electrically connected to the receiving unit 22. By electrically connecting the analysis component to the receiving unit 22, the laser information received by the receiving unit 22 can be analyzed and processed, and then the parameters of the optical fiber preform 3 can be calculated. The setting of the heating unit can change the temperature of the optical fiber preform 3, and then the control variable method can be used to experimentally determine whether the temperature has an effect on the measurement of the optical properties of the optical fiber preform 3.

[0049] In this embodiment, the shell further includes a shell body 11 and a window 12 provided on the shell body 11, the window 12 is located on the laser light path, and a light-transmitting plate 4 is provided at the window 12. The existing shell material is generally made of metal, which is harder. In order to allow the laser to irradiate into the shell, a window 12 is provided on the shell body 11, so that the laser can enter and irradiate out of the shell through the light-transmitting plate 4 on the window 12.

[0050] The shell has an upper shell section 13 and a lower shell section 14, wherein the upper shell section 13 is arranged in a rhombus shape, the laser light path passes through the upper shell section 13, and / or the lower shell section 14 is arranged in a cylindrical shape. In order to adapt to the matching position of the transmitting part 21 and the receiving part 22, the upper shell section 13 can be arranged in a rhombus shape, because the prism-shaped shell has more relative faces, which is more convenient for arranging the transmitting part 21 and the receiving part 22. A quadrangular prism can be selected, and two pairs of the transmitting part 21 and the receiving part 22 can accurately measure the parameter values ​​of the test point of the optical fiber preform 3 at different angles, wherein the two lasers are 90°. The lower shell is arranged in a cylindrical shape to hold the matching medium 5, and the cross section of the cylindrical shape is smaller than that of the prism shape, which can save the amount of the matching medium 5.

[0051] Furthermore, the cavity cross-sectional area of ​​the upper shell section 13 is greater than the cavity cross-sectional area of ​​the lower shell section 14. In this way, the amount of the matching medium 5 can be saved, and the matching medium 5 can reach the required height with less matching medium 5.

[0052] Furthermore, in this embodiment, in order to enable the lasers to accurately intersect at the test point of the optical fiber preform 3, the laser light paths of the at least two test parts 2 are in the same horizontal plane. The number of test parts 2 can be two, three or more, but at least two need to be arranged, each test part 2 can emit a laser line, and two test parts 2 can emit two laser lines and intersect at the test point.

[0053] In addition, a dust cover 6 is provided at the installation port, and an adapting hole is provided on the dust cover 6 to adapt the optical fiber preform 3. The adapting hole can only pass through the optical fiber preform 3, and the dust cover 6 can cover the periphery of the optical fiber preform 3, reducing the risk of external dust and impurities entering the housing, so that the test result is more accurate.

[0054] In addition, in order to make the matching medium 5 more stable and the measurement result more accurate, a filtering pipeline is also formed on the test device 100, and a filter and / or a pressure pump are arranged on the filtering pipeline. The inlet of the filtering pipeline is connected to the lower end of the cavity of the shell, and the outlet is connected to the upper end of the cavity of the shell. The filtering pipeline filters out impurities in the matching medium 5 to ensure the stability of the refractive index of the matching medium 5.

[0055] In order to enable the test point on the optical fiber preform 3 to quickly reach the matching medium 5, the test device 100 further includes a frame 7, a sliding portion 8 and a fixing assembly 9. The sliding portion 8 slides in the up-down direction relative to the frame 7; the fixing assembly 9 is used for the optical fiber preform 3 to be detachably fixedly mounted on the sliding portion 8. The optical fiber preform 3 can move in the up-down direction relative to the frame 7 following the sliding portion 8, so that the optical fiber preform 3 can move downward to be in the matching medium 5, and move upward to be outside the matching medium 5 after the measurement is completed. The optical fiber preform 3 can be detachably mounted on the sliding portion 8, which is convenient for installing and replacing the optical fiber preform 3.

[0056] In this embodiment, the testing device 100 further includes a sliding block 8a, a rotating clamping portion 91 and a screw 92. The sliding block 8a extends in the second direction. The sliding block 8a includes a matching sliding end and a fixed clamping end. The matching sliding end is connected to the slide rail provided on the frame 7 for sliding up and down sliding. The rotating clamping portion 91 is rotatably mounted on the sliding block 8a to clamp the optical fiber preform 3 together with the fixed clamping end. The screw 92 is used to threadably connect the rotating clamping portion 91 and the sliding block 8a. The sliding portion 8 includes the sliding block 8a and the rotating clamping portion 91, and the fixed assembly 9 includes the screw 92. The optical fiber preform 3 can be moved up and down quickly and stably by setting the slide rail and the slider. The screw 92 is low in cost and easy to purchase on the market. Obviously, the method is not limited to this. A snap-on connection or the like can also be used to achieve a detachable connection. The up and down movement method can also be a servo slide rail or the like.

[0057] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the concept of the utility model, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.

Claims

1. A testing device for testing an optical fiber preform, characterized in that: The testing device comprises: a housing containing a matching medium, wherein the housing is formed with an installation opening, wherein the installation opening is used for introducing the optical fiber preform into the matching medium, and within the housing, the matching medium can completely immerse a test point disposed on the optical fiber preform; and At least two test parts, each of which can emit laser light through the matching medium in the shell and irradiate the test point on the optical fiber preform to form a laser light path, and the laser light paths of the two test parts are used to intersect at the test point.

2. The testing device according to claim 1, characterized in that: The testing unit comprises: an emitting unit capable of emitting laser light and located on the laser light path; and The receiving part is capable of receiving laser light and is located on the laser light path. The receiving part and the transmitting part are located on opposite sides of the shell.

3. The testing device according to claim 1, characterized in that: The shell comprises a shell body and a window arranged on the shell body, wherein the window is located on the laser light path, and a light-transmitting plate is arranged at the window.

4. The testing device according to claim 1, characterized in that: The housing has an upper shell section and a lower shell section, wherein: The upper shell section is arranged in a rhombus shape, and the laser light path passes through the upper shell section; and / or, The lower shell section is arranged in a cylindrical shape.

5. The testing device according to claim 4, characterized in that: The cavity cross-sectional area of ​​the upper shell section is greater than the cavity cross-sectional area of ​​the lower shell section.

6. The testing device according to claim 1, characterized in that: The laser light paths of the at least two testing parts are in the same horizontal plane.

7. The testing device according to claim 1, characterized in that: A dust cover is provided at the installation opening, and an adapting hole is provided on the dust cover for adapting the optical fiber preform rod.

8. The testing device according to claim 1, characterized in that: A filter pipeline is also formed on the test device. A filter and / or a pressure pump is arranged on the filter pipeline. The inlet of the filter pipeline is connected to the lower end of the cavity of the shell, and the outlet is connected to the upper end of the cavity of the shell.

9. The testing device according to claim 1, characterized in that: The testing device also includes: Frame; a sliding portion that slides in an up-down direction relative to the frame; and A fixing assembly is used for detachably fixing the optical fiber preform on the sliding part.

10. The testing device according to claim 9, characterized in that: The testing device also includes: A sliding block extending in the second direction, the sliding block comprising a matching sliding end and a fixed clamping end, the matching sliding end being connected to a slide rail provided on the frame body in an up-and-down sliding manner; a rotatable clamping portion, rotatably mounted on the sliding block, for clamping the optical fiber preform together with the fixed clamping end; and A threaded member, used for threadingly connecting the rotating clamping portion and the sliding block; The sliding portion includes the sliding block and the rotating clamping portion, and the fixing assembly includes the screw member.

11. The testing device according to claim 1, characterized in that: The testing device further comprises a heating unit for heating the optical fiber preform; and / or, The testing part includes a receiving part, and the testing device also includes an analyzing component, and the analyzing component is electrically connected to the receiving part.

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