Optical filter assembly mounting angle detection device

Abstract

The utility model discloses an optical filter assembly mounting angle detection device, which comprises a computer, a sample holder, a 45-degree semi-transparent and semi-reflective rectangular prism, an adjustable laser and a camera, the 45-degree semi-transparent and semi-reflective rectangular prism is arranged corresponding to the sample holder, and the camera is arranged corresponding to the 45-degree semi-transparent and semi-reflective rectangular prism. The adjustable laser and the 45-degree semi-transparent and semi-reflecting rectangular prism are directly or indirectly arranged correspondingly, the adjustable laser is connected with the computer, and the camera is connected with the computer. Compared with the prior art, the device does not need to move back and forth in a near field and a far field, so that the movement time is saved, and the detection efficiency is improved. In addition, the surface mounting angle of each optical filter can be quantitatively obtained.

Description

Technical Field

[0001] The utility model discloses a detection device, in particular a filter assembly mounting angle detection device, which can be widely used in technical fields such as 800G optical module products, optical devices, optical network transmission, instrument testing and measurement systems, big data and data centers. Background Art

[0002] Common Filter Block product structures are as follows: Figure 1 As shown in the figure, the common structure of the current Filter Block products used for light splitting and light combining is to use optical glue to mount multiple optical filters on a Base. Due to the limitations of the filter coating process, there are generally protruding pits on the filter surface or the surface is curved, which results in the filter not being well attached during the gluing process. The consistency of the mounting angle of the filter relative to the Base is very important. If the consistency is not good, it will cause the light output angle and position to deviate after light splitting or light combining, making it difficult to couple or the coupling efficiency to decrease during subsequent assembly. Therefore, the optical filter needs to be inspected before leaving the factory. At present, the detection of the mounting angle of the filter assembly is generally evaluated indirectly by detecting the angle of the emitted light, and no direct quantitative detection is performed.

[0003] Please refer to the attached for the test process of the mounting angle of the filter assembly. Figure 2 and attached Figure 3 , the filter test steps are:

[0004] (1) Set the wavelength of the incident light to λ1, where the first filter transmits light but the other filters do not. The light paths of light transmission and reflection of λ1~λ4 in each filter are as follows Figure 3 As shown;

[0005] (2) Move the camera or spot profiler to a position L1 away from the filter (near field) and obtain the spot coordinates (X1, Y1);

[0006] (3) Move the camera or spot profiler to a position L2 away from the filter (far field) and obtain the spot coordinates as (X2, Y2);

[0007] (4) Obtain the near-field and far-field coordinates of other roads according to steps A to C;

[0008] (5) Calculate the angles of other paths relative to the first path.

[0009] The above detection method has its inherent shortcomings. First of all, this method does not directly detect the mounting angle of the filter. In addition, during the detection process, except for the first filter, the light output angles of other filters are also affected by the mounting angles of the previous filters. It is difficult to analyze which filter causes the deviation of the light output angle, and it is also difficult to analyze the mounting angle of the filter. Summary of the invention

[0010] In view of the above-mentioned shortcoming of the detection method of the mounting angle of the filter assembly in the prior art that the filter assembly does not directly detect the filter, the utility model provides a device for detecting the mounting angle of the filter assembly, which can quickly, accurately and quantitatively measure the consistency of the mounting angle of the filter.

[0011] The utility model adopts the following technical solution to solve the technical problem: a device for detecting the mounting angle of a filter assembly, the detection device comprising a computer, a sample rack, a 45-degree semi-transparent and semi-reflective right-angle prism, an adjustable laser and a camera, the 45-degree semi-transparent and semi-reflective right-angle prism being arranged corresponding to the sample rack, the camera being arranged corresponding to the 45-degree semi-transparent and semi-reflective right-angle prism, the adjustable laser being arranged directly or indirectly corresponding to the 45-degree semi-transparent and semi-reflective right-angle prism, the adjustable laser being connected to the computer, and the camera being connected to the computer.

[0012] The technical solution adopted by the utility model to solve its technical problems further includes:

[0013] The detection device also includes an XY-axis electric moving platform, the sample holder is installed on the XY-axis electric moving platform, and the XY-axis electric moving platform is connected to a computer.

[0014] The adjustable laser is connected with a collimator, which is arranged opposite to a 45-degree semi-transparent and semi-reflective right-angle prism.

[0015] The incident light surface of the camera and the emission surface of the sample to be inspected on the sample rack form an angle of 90 degrees.

[0016] The beneficial effects of the utility model are as follows: compared with the prior art, the utility model does not require near-field and far-field reciprocating motion, saves motion time, and improves detection efficiency. Moreover, the utility model can also quantitatively obtain the mounting angle of each filter.

[0017] The utility model will be further described below in conjunction with the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the Filter Block product structure.

[0019] Figure 2 The present invention is a flow chart of a method for detecting the mounting angle of an optical filter assembly in the prior art.

[0020] Figure 3 The present invention is a schematic diagram of the light transmission and reflection light paths in the detection method of the mounting angle of the filter assembly in the prior art.

[0021] Figure 4 This is a schematic diagram of the system structure of the utility model.

[0022] Figure 5 This is a partial structural diagram of the core detection component of the utility model. DETAILED DESCRIPTION

[0023] This embodiment is a preferred implementation mode of the utility model. Other embodiments whose principles and basic structures are the same or similar to those of this embodiment are within the protection scope of the utility model.

[0024] The utility model mainly protects a filter assembly mounting angle detection device, which can quickly detect the mounting angle of the filter relative to the base and quickly check the consistency of the filter mounting angle. The utility model uses light reflection to detect the mounting angle of each filter.

[0025] Please refer to 4 and the attached Figure 5 The utility model mainly includes a computer, a sample rack, a 45-degree semi-transparent and semi-reflective right-angle prism, an adjustable laser and a camera. The sample rack is used to place samples to be tested. The 45-degree semi-transparent and semi-reflective right-angle prism is arranged corresponding to the sample rack, so that the light transmitted by the 45-degree semi-transparent and semi-reflective right-angle prism can be injected into the sample on the sample rack. The camera is arranged corresponding to the 45-degree semi-transparent and semi-reflective right-angle prism, so that the light transmitted by the 45-degree semi-transparent and semi-reflective right-angle prism can be injected into the camera. The adjustable laser is directly or indirectly arranged corresponding to the 45-degree semi-transparent and semi-reflective right-angle prism, so that the light emitted by the adjustable laser can be incident on the 45-degree semi-transparent and semi-reflective right-angle prism. The adjustable laser emits light required for detection and can switch wavelengths. The adjustable laser is connected to the computer and can be controlled to work by the computer. The camera is connected to the computer. The camera is used to detect the position of the light spot reflected from the 45-degree prism and output it to the computer, and the detection signal is judged by the computer.

[0026] In this embodiment, an XY-axis electric mobile platform is also included. The sample holder is installed on the XY-axis electric mobile platform. The sample holder can be driven to move along the X-axis and Y-axis by the XY-axis electric mobile platform. The XY-axis electric mobile platform is connected to a computer and can be controlled by computer software to move the XY-axis electric mobile platform to a predetermined position, so as to move the product and the corresponding filter to the position to be inspected.

[0027] In this embodiment, a collimator is connected to the adjustable laser to convert the light coming out of the adjustable laser into collimated light with relatively small divergence. The collimator is arranged opposite to the 45-degree semi-transparent and semi-reflected right-angle prism, so that the collimated light can be incident on the 45-degree semi-transparent and semi-reflected right-angle prism. The light emitted by the collimator passes through the 45-degree semi-transparent and semi-reflected right-angle prism and illuminates the full-reflective surface of the filter. At the same time, another light beam reflected from the filter is reflected on the 45-degree inclined surface to the camera.

[0028] In this embodiment, the incident light plane of the camera and the emission plane of the sample to be inspected on the sample holder form an angle of 90°.

[0029] The utility model can be used for detecting the angle consistency of the filter after mounting, and can also be used for controlling the mounting angle during online mounting. The specific working process is as follows:

[0030] (1) Place multiple or one sample on the sample rack;

[0031] (2) Using a computer to drive the XY moving platform, move the first filter of the first sample to the detection position;

[0032] (3) Control the tunable laser on a computer to switch to the wavelength λ1 of the filter, which is fully reflective. At wavelength λ1, all light is reflected at the bonding surface of the filter, preventing the light from penetrating to other interfaces and causing other reflections, which would interfere with the analysis.

[0033] (4) The computer obtains the position of the light spot on the camera, assuming the coordinates are (X1, Y1);

[0034] (5) Move the nth (n ≥ 2) filter to the position to be inspected in sequence according to steps (2) to (4), and set the wavelength to the wavelength λn of the total reflection of the filter, and obtain the position of the light spot reflected by the filter on the camera. Assume that the coordinates are (Xn, Yn), where the subscript n represents the nth filter;

[0035] (6) Based on the coordinates, calculate the angles of the 2nd to nth filters relative to the first filter.

[0036] (7) If there are untested products on the sample rack, follow steps (2) to (6) to complete the testing of other samples.

[0037] Compared with the prior art, the utility model does not need to move back and forth between the near field and the far field, thus saving movement time and improving detection efficiency. Moreover, the utility model can also quantitatively obtain the mounting angle of each filter.

Claims

1. A filter assembly mounting angle detection device, Its characteristics are: The detection device includes a computer, a sample rack, a 45-degree semi-transparent and semi-reflective right-angle prism, an adjustable laser and a camera. The 45-degree semi-transparent and semi-reflective right-angle prism is arranged corresponding to the sample rack, the camera is arranged corresponding to the 45-degree semi-transparent and semi-reflective right-angle prism, the adjustable laser is arranged directly or indirectly corresponding to the 45-degree semi-transparent and semi-reflective right-angle prism, the adjustable laser is connected to the computer, and the camera is connected to the computer.

2. The optical filter assembly mounting angle detection device according to claim 1, Its characteristics are: The detection device also includes an XY-axis electric moving platform, the sample holder is installed on the XY-axis electric moving platform, and the XY-axis electric moving platform is connected to a computer.

3. The optical filter assembly mounting angle detection device according to claim 1, Its characteristics are: The adjustable laser is connected with a collimator, which is arranged opposite to a 45-degree semi-transparent and semi-reflective right-angle prism.

4. The optical filter assembly mounting angle detection device according to claim 1, Its characteristics are: The incident light plane of the camera and the emission plane of the sample to be inspected on the sample rack form an angle of 90 degrees.

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