A light-out focus testing device for a Z-block assembly

Abstract

The utility model provides a kind of Z-block assembly's light output focal length testing device, including machine table, machine table is provided with: first seat body, for placing Z-block assembly;Second seat body is used to place fiber array, and make the receiving end surface of fiber array be below the output end surface of Z-block assembly to receive optical signal, fiber array is connected with optical power meter;Camera module is used to calibrate the angle of fiber array and identify the position change of fiber array relative to Z-block assembly;Multi-axis adjustment module is used to adjust the relative position of receiving end surface on fiber array relative to the output end surface on Z-block assembly.The utility model moves fiber array, and simultaneously observes optical power meter reading, until the position of maximum light intensity is found, then compared with theoretical value, more than 80% of theoretical value is satisfied, which indicates that the light output focal length of Z-block assembly is tested.

Description

Technical Field

[0001] This utility model relates to the field of optical communication technology, specifically, it demonstrates a device for testing the light output focal length of a Z-block component. Background Technology

[0002] A Z-block module is an optical element whose internal optical path typically follows a unique right-angled path and undergoes multiple reflections before ultimately outputting the optical signal vertically downwards. The performance parameters of this module, especially the output focal length (i.e., the convergence point of the output light spot), are key indicators determining its coupling efficiency with downstream optical systems (such as fiber optic arrays). Therefore, accurate and efficient testing of the output focal length of Z-block modules is crucial for ensuring the overall performance and quality of optical module products.

[0003] Currently, the common practice for focal length testing of such special optical path structure components is as follows: The Z-block component is initially fixed, and then the receiving fiber or detector is manually moved in space for a coarse search and fine position adjustment (including translation in the X, Y, and Z directions and angular deflection). Simultaneously, the readings of the connected optical power meter are observed to find the point of maximum optical power. This measured optimal coupling position is then compared with the theoretical focal length position to determine whether the focal length of the Z-block component is acceptable.

[0004] However, this manual testing method has its problems: the alignment process relies on the operator's experience, is highly subjective, is difficult to automate, and has low positioning accuracy and efficiency, which seriously affects the accuracy and reliability of the test results. Utility Model Content

[0005] The purpose of this invention is to provide a device for testing the light output focal length of a Z-block component. This device has a simple and practical structure and high testing accuracy.

[0006] The technical solution is as follows:

[0007] A device for testing the light output focal length of a Z-block component includes a machine base, wherein the machine base is equipped with:

[0008] The first base is used to place the Z-block component. The optical signal is transmitted in the Z-block component in a right-angled path and is output vertically downward after multiple reflections.

[0009] The second housing is used to place the fiber optic array, and the receiving end face of the fiber optic array is located below the output end face of the Z-block component to receive optical signals. An external optical power meter is connected to the fiber optic array.

[0010] The camera module, with its lens facing the Z-block component and the fiber array, is used to calibrate the angle of the fiber array and identify the positional changes of the fiber array relative to the Z-block component.

[0011] The multi-axis adjustment module, connected to the second base, is used to adjust the relative position of the receiving end face on the fiber array with respect to the output end face on the Z-block component.

[0012] In addition, the above embodiments of this utility model may also have the following additional technical features:

[0013] According to one embodiment of this utility model, the first base is provided with a contoured groove for the Z-block component to be placed flat, and the end of the Z-block component is exposed outward. The contoured groove improves clamping efficiency and initial positioning accuracy, ensuring that the output light of the Z-block can be emitted without obstruction and received by the fiber array below, thus guaranteeing the accuracy of the test.

[0014] In one embodiment, the first base is further provided with a clamping assembly, which includes:

[0015] The first support is hinged to the lower pressure arm, which can contact the top surface of the Z-block component during rotation;

[0016] The second support is opposite to the first support and is located on both sides of the contour groove;

[0017] The screw body is mounted on the second support, and a limiting plate is threaded onto the screw body. During rotation, the limiting plate can contact the top surface of the lower pressure arm.

[0018] The pressure arm presses down on the Z-block assembly from above, and the limiting plate locks the pressure arm from the side, forming a stable and reliable clamping force to prevent the assembly from moving during testing.

[0019] Based on the above scheme, a first XY-axis displacement platform is provided between the first base and the machine tool, and the position of the first base relative to the machine tool is adjusted by the first XY-axis displacement platform. This allows for fine-tuning of the horizontal position of the Z-block component, which can compensate for minor dimensional errors in the Z-block component itself or its installation.

[0020] According to one embodiment of this utility model, a stepped groove for placing an optical fiber array is formed on the second base, and the head end of the optical fiber array is exposed outward. This enables rapid and accurate initial positioning of the optical fiber array and ensures that its receiving end face is exposed in the optical path.

[0021] In one embodiment, a pressure arm is hinged to the side of the second base. A spring is installed between the rear end of the pressure arm and the second base. The spring is always in a compressed state. Under the action of the spring, the front end of the pressure arm exerts an inward squeezing force on the fiber array. The spring and the pressure arm work together to provide a continuous lateral force, pushing the fiber array toward one side of the stepped groove reference plane, thus achieving unidirectional positioning.

[0022] Based on the above scheme, the second seat is further provided with an adsorption assembly, which includes a support and an adsorption head mounted on the support. The adsorption head is used to connect to an external negative pressure source, and is vertically upward and located below the stepped groove, for adsorbing and fixing the fiber array. Vacuum adsorption provides a vertical clamping force from below the fiber array.

[0023] According to one embodiment of this utility model, the multi-axis adjustment module includes a second XY-axis displacement platform, a Z-axis displacement platform connected to the second XY-axis displacement platform, a rotation platform connected to the Z-axis displacement platform, and a Z-axis fine-tuning platform connected to the rotation platform. This enables adjustment of the lateral, longitudinal, and rotational angles of the fiber optic array, precisely adjusting the relative position of the fiber optic array end face and the light spot.

[0024] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0025] 1. The first and second mounting bodies provide dedicated and stable installation stations, ensuring that Z-block components and fiber arrays can be installed in a repeatable posture and position each time. This fundamentally solves the problems of non-repeatable positioning of general fixtures and inconsistent initial conditions for each test, thus providing conditions for automated testing.

[0026] 2. The camera module ensures the parallelism between the receiving end face of the fiber array and the output end face of the Z-block, thereby calibrating the angle of the fiber array. It can also monitor the movement of the fiber array in real time, providing visual feedback. Combined with the motion control of the multi-axis adjustment module, it improves the accuracy of fiber array movement.

[0027] 3. Move the fiber optic array while observing the optical power meter reading until the position with the maximum light intensity is found. Then compare it with the theoretical value. If it meets more than 80% of the theoretical value, it means that the output focal length of the Z-block component has been obtained. Attached Figure Description

[0028] Figure 1 This is a simplified schematic diagram of a light-emitting focal length testing device for a Z-block component according to Embodiment 1 of this utility model;

[0029] Figure 2 This is a schematic diagram relating to the Z-block component and fiber array in an embodiment of the present invention;

[0030] Figure 3 This is a schematic diagram of the first seat portion in Embodiment 2 of this utility model;

[0031] Figure 4 This is a partial enlarged view of the contour groove portion on the first base body in Embodiment 2 of this utility model;

[0032] Figure 5 This is a schematic diagram of the second seat portion in Embodiment 3 of this utility model;

[0033] The relevant markings in the attached diagram are: a-Z-block component, b-fiber array, 1-machine platform, 2-first base, 3-second base, 4-camera module, 5-multi-axis adjustment module, 6-first XY-axis displacement platform, 21-contouring groove, 22-first support, 23-lower pressure arm, 24-second support, 25-screw body, 26-limiting plate, 31-step groove, 32-pressure arm, 33-spring component, 34-bracket, 35-adsorption head, 51-second XY-axis displacement platform, 52-Z-axis displacement platform, 53-rotation platform, 54-Z-axis fine-tuning platform. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0035] Example 1:

[0036] See Figure 1 As shown in the figure, this utility model embodiment proposes a light output focal length testing device for a Z-block component, including a machine base 1, and a first base 2, a second base 3, a camera module 4, and a multi-axis adjustment module 5 disposed on the machine base 1. The machine base adopts an optical flat plate.

[0037] The first base 2 is used to stably place the Z-block component a. The optical signal is transmitted in a right-angled path within the Z-block component a and outputs vertically downwards after multiple reflections. The second base 3 is used to place the fiber array b, with the receiving end face of the fiber array b located below the output end face of the Z-block component a to receive the optical signal. See [reference needed] for details. Figure 2The diagram shown illustrates the test results of Z-block component a and fiber array b. Visually, they are almost parallel. Fiber array b is connected to an external optical power meter, which measures the optical power intensity of the fiber array. The fiber array is used to find the light output focal point of the Z-block component. When the optical power meter reading is at its maximum and the reading is more than 80% of the theoretical value, it indicates that the position is the light output focal point.

[0038] The lens of camera module 4 is oriented towards Z-block component a and fiber array b. It is used to calibrate the angle of fiber array b and identify the positional change of fiber array b relative to Z-block component a. On the one hand, it is necessary to ensure the parallelism between the receiving end face of the fiber array and the output end face of the Z-block to eliminate angular deviation. On the other hand, it can monitor the movement of the fiber array in real time and provide visual feedback. Combined with the motion control of the multi-axis adjustment module, it can help operators accurately understand the current position of the fiber array.

[0039] The multi-axis adjustment module 5 is connected to the second base 3 and is used to adjust the relative position of the receiving end face on the fiber array b with respect to the output end face on the Z-block component a, that is, the control of the horizontal, vertical and rotation angles. This allows for precise movement of the fiber array in multiple degrees of freedom, making it easier to find the point where the Z-block component generates the maximum optical power, ensuring that the true focal point can be found and improving the test accuracy.

[0040] The testing device in this embodiment is simple to use. Through the design of dedicated positioning, visual assistance, and precision adjustment, it realizes fast, high-precision, and repeatable automated testing of the light output focal length of the Z-block component.

[0041] In this embodiment, the multi-axis adjustment module 5 includes a second XY-axis displacement platform 51, a Z-axis displacement platform 52 connected to the second XY-axis displacement platform 51, a rotation platform 53 connected to the Z-axis displacement platform 52, and a Z-axis fine-tuning platform 54 connected to the rotation platform 53. The Z-axis fine-tuning platform 54 is connected to the second base 3. The second XY-axis displacement platform 51, the Z-axis displacement platform 52, the rotation platform 53, and the Z-axis fine-tuning platform 54 are all existing technologies and are standard parts. After working together, they can achieve multi-degree-of-freedom adjustment of the fiber array in the lateral, longitudinal, and rotation angles, thereby accurately adjusting the relative position of the fiber array end face and the light spot.

[0042] Example 2:

[0043] Based on the technical solution of Embodiment 1 above.

[0044] Reference Figure 3 and Figure 4As shown, the first base 2 is provided with a contouring groove 21 for the Z-block component a to be placed flat, and the end of the Z-block component b is exposed outward. The contouring groove is a groove that matches the shape of the Z-block component, enabling rapid positioning of the component without repeated adjustments, thus improving clamping efficiency and initial positioning accuracy; while the exposed end of the Z-block component ensures that the output light of the Z-block can be emitted without obstruction and received by the fiber array below, with an unobstructed optical path, ensuring the accuracy of the test.

[0045] Furthermore, a clamping assembly is also provided on the first base 2, which includes: a first support 22, on which a lower pressure arm 23 is hinged, that is, one end of the lower pressure arm 23 is hinged to the first support 22, allowing the lower pressure arm 23 to rotate around the connection point, and during rotation, the lower pressure arm 23 can contact the top surface of the Z-block component placed in the contour groove 21; a second support 24, opposite to the first support 22, located on both sides of the contour groove 21; and a screw body 25, which is mounted on the second support 24, with a limiting plate 26 threadedly connected to the screw body 25, and the limiting plate 26 can contact the top surface of the lower pressure arm 23 during rotation. The lower pressure arm presses down on the component from above, and the limiting plate locks the lower pressure arm from the side, forming a stable and reliable clamping force to prevent the component from moving during testing. The structure is ingeniously designed, the operation steps are simple, and it is convenient to pick up and put down the Z-block component.

[0046] Furthermore, a first XY-axis displacement platform 51 is also provided between the first base 2 and the machine tool 1. The position of the first base 2 relative to the machine tool 1 is adjusted by the first XY-axis displacement platform 51. Similarly, the first XY-axis displacement platform is also a standard part. The horizontal position of the Z-block component can be finely adjusted by the first XY-axis displacement platform, which can compensate for the small dimensional errors of the Z-block component itself or its installation.

[0047] Example 3:

[0048] Based on the technical solutions of Embodiments 1 and 2 above.

[0049] See Figure 5 As shown, a stepped slot 31 for placing the fiber array b is opened on the second body 3, and the head end of the fiber array b is exposed outward. The stepped slot enables rapid and accurate initial positioning of the fiber array and ensures that its receiving end face is exposed in the optical path.

[0050] To ensure the stability of the fiber array during the movement of the second base, the following design is adopted: The side of the second base 3 is hinged to the pressure arm 32. That is, after the middle part of the pressure arm 32 is hinged to the second base 3, it can rotate around the hinge point. A spring 33 is set between the rear end of the pressure arm 32 and the second base 3. The spring 33 is always in a compressed state. Under the elastic action of the spring 33, the front end of the pressure arm 32 will exert an inward squeezing force on the fiber array b. In this way, the spring and the pressure arm can provide a continuous lateral force to push the fiber array towards the reference surface on one side of the stepped groove, realizing unidirectional positioning.

[0051] Furthermore, an adsorption assembly is also provided on the second base 3. The adsorption assembly is located below the stepped groove 31. The adsorption assembly includes a bracket 34 connected to the second base 3 and an adsorption head 35 mounted on the bracket 34. The adsorption head 35 is used to connect to an external negative pressure source. The adsorption head 35 is vertically upward and located below the stepped groove 31, and is used to adsorb and fix the fiber array b. A vertical clamping force is provided from below the fiber array through vacuum adsorption. The combination of these two methods achieves constraint on the fiber array in both the horizontal and vertical directions, preventing shaking and ensuring that the fiber array itself will not undergo slight displacement during precision adjustment, thereby guaranteeing the stability and reliability of the test data.

[0052] The above descriptions are merely some embodiments of this utility model. For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of this utility model, and all such modifications and improvements fall within the protection scope of this utility model.

Claims

1. A device for testing the light output focal length of a Z-block component, comprising a machine base (1), characterized in that, The machine (1) is equipped with: The first seat (2) is used to place the Z-block component. The optical signal is transmitted in the Z-block component in a right-angled path and is output vertically downward after multiple reflections. The second seat (3) is used to place the fiber array and to position the receiving end face of the fiber array below the output end face of the Z-block component to receive optical signals. The fiber array is connected to an external optical power meter. The camera module (4) has its lens facing the Z-block component and the fiber array, and is used to calibrate the angle of the fiber array and identify the positional changes of the fiber array relative to the Z-block component; The multi-axis adjustment module (5) is connected to the second base (3) and is used to adjust the relative position of the receiving end face on the fiber array with respect to the output end face on the Z-block component.

2. The light-emitting focal length testing device for a Z-block component according to claim 1, characterized in that, The first base (2) is provided with a contour groove (21) for the Z-block component to be laid flat, and the end of the Z-block component is exposed outward.

3. The light-emitting focal length testing device for a Z-block component according to claim 2, characterized in that, The first base (2) is also provided with a clamping assembly, which includes: The first support (22) is hinged to the lower pressure arm (23), which can contact the top surface of the Z-block component during rotation; The second support (24), which is opposite to the first support (22), is located on both sides of the contour groove (21); The screw body (25) is mounted on the second support (24), and a limiting plate (26) is threaded onto the screw body (25). The limiting plate (26) can contact the top surface of the lower pressure arm (23) during rotation.

4. The light-emitting focal length testing device for a Z-block component according to claim 3, characterized in that, A first XY axis displacement platform (6) is provided between the first seat (2) and the machine (1), and the position of the first seat (2) relative to the machine (1) is adjusted by the first XY axis displacement platform (6).

5. The light-emitting focal length testing device for a Z-block component according to claim 1, characterized in that, The second base (3) has a stepped slot (31) for placing the fiber array, and the head end of the fiber array is exposed outward.

6. The light-emitting focal length testing device for a Z-block component according to claim 5, characterized in that, The side of the second seat (3) is hinged to the pressure arm (32). A spring (33) is provided between the rear end of the pressure arm (32) and the second seat (3). The spring (33) is always in a compressed state. Under the action of the spring (33), the front end of the pressure arm (32) will exert an inward squeezing force on the fiber array.

7. The light-emitting focal length testing device for a Z-block component according to claim 6, characterized in that, The second seat (3) is also provided with an adsorption component, which includes a bracket (34) and an adsorption head (35) provided on the bracket (34). The adsorption head (35) is used to connect to an external negative pressure source. The adsorption head (35) is vertically upward and located below the stepped groove (31) for adsorbing and fixing the optical fiber array.

8. The light-emitting focal length testing device for a Z-block component according to claim 1, characterized in that, The multi-axis adjustment module (5) includes a second XY axis displacement platform (51), a Z axis displacement platform (52) connected to the second XY axis displacement platform (51), a rotation platform (53) connected to the Z axis displacement platform (52), and a Z axis fine-tuning platform (54) connected to the rotation platform (53).

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