Testing system and testing method of optical waveguide

Abstract

The embodiment of the invention provides a test system and a test method of an optical waveguide. The optical waveguide test system comprises a carrying table, a light source module, an integrating sphere assembly, a second detector and a third detector. The carrying table is used for carrying the optical waveguide, the light source module comprises a light source and a beam splitter, a light beam emitted by the light source is divided into a transmission light beam and a reflection light beam through the beam splitter, the transmission light beam is coupled into the light coupling area, and the reflection light beam is received by the integrating sphere assembly; the integrating sphere assembly comprises an integrating sphere body and a first detector, the first detector is located on the integrating sphere body, and the first detector obtains luminous flux according to a reflected light beam received by the first detector; the second detector is located on the light emitting side of the light coupling-out area and obtains a first light signal, and the first light signal is the brightness value of light on the light emitting side; the third detector is located on the backlight side of the light coupling-out area and obtains a second light signal, and the second light signal is the brightness value of the light on the back coupling-out side.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of optical waveguide detection, and more specifically, to a testing system and a testing method for an optical waveguide. Background Art

[0002] AR (augmented reality) devices are head-mounted devices that realize augmented reality, in which optical waveguides are the core components for realizing augmented reality. Therefore, the optical performance of optical waveguides and their modules is directly related to the user experience of the AR device group. There are many indicators for judging the optical performance of optical waveguides, such as light effect, light leakage, uniformity, contrast, MTF, distortion, ghosting, stray light, etc. Among them, light effect directly reflects the optical performance of optical waveguides.

[0003] The current testing systems and methods for the optical performance of optical waveguides do not implement real-time monitoring of the luminous flux. In addition, the stability of the light source will be affected by many factors such as temperature and working time, so the stability of the luminous flux cannot be guaranteed. Therefore, the light efficiency and light leakage cannot truly reflect the optical performance of the optical waveguide.

[0004] Therefore, it is particularly important to provide a technical solution that can monitor light effects in real time. Summary of the invention

[0005] The purpose of this application is to provide a new technical solution for a testing system and a testing method of an optical waveguide.

[0006] In a first aspect, the present application provides a test system for an optical waveguide. A test system for an optical waveguide, characterized in that the optical waveguide includes a light coupling-in area and a light coupling-out area; the test system includes: a carrier, a light source module, an integrating sphere assembly, a second detector, and a third detector;

[0007] The carrier is used to carry the optical waveguide;

[0008] The light source module comprises a light source and a beam splitter, wherein the light beam emitted by the light source is divided into a transmitted light beam and a reflected light beam by the beam splitter, wherein the transmitted light beam is coupled into the light coupling-in area, and the reflected light beam is received by the integrating sphere assembly;

[0009] The integrating sphere assembly comprises an integrating sphere body and a first detector, wherein the first detector is located in the integrating sphere body, and the first detector obtains a luminous flux according to a light beam received by the first detector;

[0010] The second detector is located at the light output side of the light output coupling area, and acquires a first light signal, where the first light signal is the brightness value of the light on the output coupling side;

[0011] The third detector is located at the backlight side of the light outcoupling area and acquires a second light signal, where the second light signal is the brightness value of the light on the back-coupling side.

[0012] Optionally, the integrating sphere assembly comprises an integrating sphere body, and the integrating sphere body is provided with a window;

[0013] The testing system further comprises an optical fiber connection portion installed on the window and connected to the beam splitter, wherein the optical fiber connection portion is used to transmit the reflected light beam to the integrating sphere body.

[0014] Optionally, the light source module further includes an adjustable diaphragm, and the adjustable diaphragm is located between the light source and the beam splitter.

[0015] Optionally, the integrating sphere assembly further includes a compensator, and the compensator is located on the integrating sphere body.

[0016] Optionally, a plurality of six-axis displacement platforms are further included, and the light source module, the second detector and the third detector are all arranged on the six-axis displacement platforms.

[0017] Optionally, the integrating sphere body is provided with a first opening, and the first detector is opposite to the first opening.

[0018] Optionally, the integrating sphere body is provided with a second opening, and the compensator is opposite to the second opening.

[0019] Optionally, the compensator is located on a first side of the integrating sphere body, the first detector is located on a second side of the integrating sphere body, and the first side and the second side are opposite to each other.

[0020] In a second aspect, a method for testing an optical waveguide is provided. The method is applied to the optical waveguide testing system as described in the first aspect;

[0021] The test method includes:

[0022] Controlling the light beam emitted by the light source to be transmitted to the beam splitter to form a reflected light beam and a transmitted light beam;

[0023] Measuring luminous flux according to the light beam received by the first detector;

[0024] Measure a first light signal according to the light received by the second detector;

[0025] Measure a second light signal according to the light received by the third detector;

[0026] A light efficiency parameter of the optical waveguide is obtained based on the light flux, the first light signal, and the second light signal.

[0027] Optionally, the integrating sphere assembly further comprises a compensator;

[0028] The luminous flux measured according to the light beam received by the first detector specifically includes:

[0029] The luminous flux is measured according to the reflected light beam received by the first detector and the compensator output light beam received by the first detector.

[0030] According to an embodiment of the present application, a testing system for an optical waveguide is provided, which acquires the luminous flux of a reflected light beam in real time through a light source assembly and an integrating sphere assembly, acquires the brightness value of light coupled out of a light coupling area in real time through a second detector, and acquires the brightness value of light on the backlight side of the light coupling area in real time through a third detector. According to the luminous flux and the brightness values ​​of light on different sides of the light coupling out, the optical efficiency of the optical waveguide is measured in real time.

[0031] Other features and advantages of the present specification will become apparent from the following detailed description of exemplary embodiments of the present specification with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the specification and, together with the description, serve to explain the principles of the specification.

[0033] Figure 1 Shown is a structural diagram of an optical waveguide testing system provided in an embodiment of the present application.

[0034] Description of reference numerals:

[0035] 1. Optical waveguide body; 10. Light incoupling area; 11. Light outcoupling area;

[0036] 2. light source module; 20. light source; 21. adjustable aperture; 22. beam splitter; 23. optical fiber connection part; 231. optical fiber interface; 232. optical fiber;

[0037] 3. Integrating sphere assembly; 30. Integrating sphere body; 31. First detector; 32. Compensator; 301. Window;

[0038] 4. Second detector;

[0039] 5. The third detector. DETAILED DESCRIPTION

[0040] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present application.

[0041] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present application, its application, or uses.

[0042] Techniques and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the techniques and equipment should be considered part of the specification.

[0043] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0044] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0045] In a first aspect, an embodiment of the present application provides a test system for an optical waveguide, which is used to detect the optical efficiency parameters of the optical waveguide, for example, the optical efficiency of the out-coupling side of the out-coupling zone of the optical waveguide and the optical efficiency of the back out-coupling side of the out-coupling zone of the optical waveguide can be detected. The test system for the optical waveguide provided in the embodiment of the present application is mainly used to detect the optical efficiency parameters of the diffraction optical waveguide. Diffraction optical waveguide The diffraction optical waveguide includes a transmission diffraction optical waveguide and a reflection diffraction optical waveguide, wherein the test system for the optical waveguide provided in the embodiment of the present application can be applied to the transmission diffraction optical waveguide and the reflection diffraction optical waveguide. The diffraction optical waveguide includes an optical waveguide body 1, a light coupling-in area 10 and a light coupling-out area 11, wherein the light coupling-in area 10 and the light coupling-out area 11 are located on the optical waveguide body 1, wherein the incident light enters the diffraction optical waveguide from the light coupling-in area 10, and after being transmitted by the diffraction optical waveguide, the light is emitted from the light coupling-out area 11.

[0046] A common optical waveguide light efficiency test scheme is to use two detectors to receive the back leakage brightness value after passing through the optical waveguide and the brightness value coupled out through the waveguide OC area, and then measure the luminous flux corresponding to the light source 20 side to indirectly obtain the light efficiency and light leakage value of the waveguide product. This existing evaluation method has the following problems: the luminous flux in the test system is not a real-time monitoring value, and the stability of the light source 20 will be affected by many factors such as temperature and working time, so the stability of the luminous flux cannot be guaranteed. Therefore, the light efficiency and light leakage obtained cannot truly reflect the light efficiency performance of the optical waveguide. In order to solve the above problems, the embodiments of the present application provide a new optical waveguide test system and test method.

[0047] Various embodiments and examples disclosed in the present application are described below in conjunction with the accompanying drawings.

[0048] Reference Figure 1 The test system includes: a carrier, a light source module 2, an integrating sphere assembly 3, a second detector 4 and a third detector 5.

[0049] The carrier is used for carrying the optical waveguide.

[0050] The light source module 2 includes a light source 20 and a beam splitter 22 . The light beam emitted by the light source 20 is split into a transmitted light beam and a reflected light beam by the beam splitter 22 . The transmitted light beam is coupled into the light coupling-in area 10 , and the reflected light beam is received by the integrating sphere assembly 3 .

[0051] The integrating sphere assembly 3 includes an integrating sphere body 30 and a first detector 31 . The first detector 31 is disposed on the integrating sphere body 30 . The first detector 31 obtains luminous flux according to the reflected light beam it receives.

[0052] The second detector 4 is located at the light output side of the light output coupling area 11 and acquires a first light signal, where the first light signal is the brightness value of the light at the output coupling side.

[0053] The third detector 5 is located at the backlight side of the light outcoupling area 11 and acquires a second light signal, where the second light signal is the brightness value of the light at the backlight outcoupling side.

[0054] In an embodiment of the present application, the optical waveguide test system includes a carrier, on which the optical waveguide is placed. For example, the carrier can be a contoured waveguide tooling for placing the optical waveguide or optical waveguide module sample to be tested. The carrier can be used with a multi-axis shift stage to achieve rapid switching of different samples to be tested.

[0055] The optical waveguide test system includes a light source module 2, which is used to emit light. A portion of the light emitted by the light source module 2 is coupled into the optical waveguide through a light coupling-in region 10, transmitted in the optical waveguide, and then coupled out into the human eye through a light coupling-out region 11. Another portion of the light emitted by the light source module 2 is received by an integrating sphere assembly 3.

[0056] Specifically, the light source module 2 includes a light source 20 and a beam splitter 22. The light source 20 provides white light, red light, green light, blue light, etc., which meet the optical performance tests such as light efficiency. In one example, the light source 20 is an adjustable light source 20. In another example, the light source 20 can be a combination of multiple LED light sources 20, or other single-wavelength light sources 20 can be selected. The beam splitter 22 is used to split the light emitted by the light source 20 in equal proportions to form a transmitted light beam and a reflected light beam. For example, the splitting ratio of the beam splitter 22 (reflected light beam: transmitted light beam) can be 50:50, 40:60, etc. The beam splitter 22 splits the light emitted by the light source 20 in equal proportions to form a transmitted light beam and a reflected light beam, wherein the transmitted light beam is used as an incident light signal of the light waveguide, and the reflected light beam is received by the integrating sphere assembly 3, and the reflected light beam received by the integrating sphere assembly 3 is detected and monitored.

[0057] The optical waveguide test system includes an integrating sphere assembly 3, which is used to measure in real time the luminous flux of the reflected light beam formed by the beam splitter 22. In this way, based on the light splitting ratio of the beam splitter 22 and the measured luminous flux of the reflected light beam, the luminous flux of the transmitted light beam can be obtained, that is, the luminous flux of the light coupled into the light coupling region 10 is obtained.

[0058] Specifically, the integrating sphere assembly 3 includes an integrating sphere body 30 and a first detector 31, and the first detector 31 is disposed on the integrating sphere body 30. The reflected light beam formed by the reflection of the beam splitter 22 is transmitted to the integrating sphere body 30, and then received by the first detector 31, and the first detector 31 obtains the luminous flux according to the light beam received. The luminous flux of the transmitted light beam can be obtained according to the luminous flux measured by the first detector 31, that is, the luminous flux of the light coupled into the light coupling area 10 is obtained. The first detector 31 is used to realize real-time monitoring of the luminous flux, and also eliminates the error of the stability of the light source 20.

[0059] The optical waveguide test system further includes a second detector 4, which is used to receive the optical signal from the light outcoupling side (i.e., the human eye side) of the light outcoupling area 11 to meet the test of the optical performance of the optical waveguide. Specifically, the second detector 4 is located at the light outcoupling side of the light outcoupling area 11, and the second detector 4 detects the brightness value of the light outcoupled from the light outcoupling area 11 in real time.

[0060] The optical waveguide test system further includes a third detector 5, which is used to receive the optical signal from the back coupling side (i.e., the non-human eye side) of the light coupling area 11, so as to test the optical performance such as light leakage. Specifically, the third detector 5 is located on the back coupling side of the light coupling area 11, and the third detector 5 detects the brightness value of the light emitted from the back coupling side in real time.

[0061] Therefore, in the embodiment of the present application, the luminous flux of the light coupled into the light coupling-in area 10 can be detected in real time by combining the light source module 2 and the integrating sphere assembly 3. The brightness value of the light coupled out from the light coupling-out area 11 can be detected in real time by the second detector 4. According to the brightness value of the light coupled out of the light coupling-out area 11 and the luminous flux of the light coupled into the light coupling-in area 10, the light effect on the coupling-out side of the optical waveguide coupling-out area at a specific time is obtained. For example, the luminous flux of the light coupled into the light coupling-in area 10 at the first moment is obtained by the light source module 2 and the integrating sphere assembly 3, and the brightness value of the light coupled out from the light coupling-out area 11 at the moment is obtained by the second detector 4, so that the light effect (defined as the coupling-out light effect) on the coupling-out side of the optical waveguide coupling-out area at the same moment can be obtained.

[0062] And in the embodiment of the present application, by combining the light source module 2 and the integrating sphere assembly 3, the luminous flux of the light coupled into the light coupling-in area 10 can be detected in real time. The brightness value of the light emitted from the light coupling-out area 11 away from the coupling-out side can be detected in real time by the third detector 5. According to the brightness value of the light emitted away from the coupling-out area and the luminous flux of the light coupled into the light coupling-in area 10, the light effect (defined as the light leakage effect) of the light waveguide coupling-out area away from the coupling-out side at a specific time is obtained.

[0063] Therefore, in the embodiment of the present application, a complete measurement system capable of detecting the optical efficiency performance of the AR optical waveguide in real time is formed by the light source module 2, the integrating sphere assembly 3, the second detector 4 and the third detector 5. By real-time measuring the luminous flux and the optical signal in the optical waveguide outcoupling area, the real-time measurement of the outcoupling optical efficiency and the leakage optical efficiency is achieved.

[0064] In one embodiment, referring to Figure 1 , the integrating sphere body 30 has a window;

[0065] The testing system further includes an optical fiber connection portion 23 installed on the window and connected to the beam splitter 22 , and the optical fiber connection portion 23 is used to transmit the reflected light beam to the integrating sphere body 30 .

[0066] In this embodiment, the beam splitter 22 and the integrating sphere body 30 are connected together through the optical fiber connection part 23, and the reflected light beam is transmitted to the integrating sphere body 30 through the optical fiber connection part 23. The optical fiber connection part 23 includes an optical fiber interface 231 and an optical fiber 232. The reflected light beam formed by the beam splitter 22 is coupled into the optical fiber 232 for reception, and is transmitted to the integrating sphere body 30 through the optical fiber 232, and then is received by the first detector 31 for testing, so as to realize real-time monitoring of the light flux of the light source 20.

[0067] In one embodiment, referring to Figure 1 The light source module 2 further includes an adjustable diaphragm 21 , and the adjustable diaphragm 21 is located between the light source 20 and the beam splitter 22 .

[0068] In this embodiment, the light source module 2 further includes an adjustable diaphragm 21, which is used to adjust the FOV of the incident light beam to meet the optical waveguides of different design specifications. Specifically, the adjustable diaphragm 21 is arranged between the light source 20 and the beam splitter 22, so that the light source module 2 is more universal.

[0069] In one embodiment, referring to Figure 1 The integrating sphere assembly 3 further includes a compensator 32 , and the compensator 32 is located on the integrating sphere body 30 .

[0070] In this embodiment, the compensator 32 is used to compensate for the light received by the integrator body and the light splitting by the beam splitter 22 in the light source module 2. Specifically, the compensator 32 is used to compensate for the additional luminous flux error caused by the window of the integrating sphere itself and the beam splitter 22.

[0071] For example, the compensator 32 is used to compensate for the error of the luminous flux of two parts, one of which is derived from the splitting of the beam splitter 22. For example, the output light beam of the light source 20 is 100, and the splitting ratio of the beam splitter 22 is 50:50, while the actual amount transmitted to the inside of the integrating sphere body 30 is 49.9% of the output light beam, which does not reach the theoretical 50%. It can be compensated by transmitting light into the integrating sphere body 30 through the compensator 32. The other part is derived from the integrating sphere body 30 itself. For example, the reflected light beam formed by the reflection of the beam splitter 22 is transmitted in the integrating sphere body 30 and received by the first detector 31, and a part of the light beam is not received by the first detector 31 after a series of total reflections, but leaks out from the window of the integrating sphere body 30 itself, and the leaked light can be compensated by transmitting light into the integrating sphere body 30 through the compensator 32.

[0072] It should be noted that supplementing the light source 20 by the compensator 32 is a technical solution well known in the art. How to compensate the luminous flux error caused by the integrating sphere's own window and the beam splitter 22 by the compensator 32 will not be elaborated here.

[0073] In this embodiment, the compensator 32 compensates for the additional light flux error caused by the window of the integrating sphere itself and the beam splitter 22, thereby improving the light efficiency measurement accuracy of the optical waveguide.

[0074] In one embodiment, a plurality of six-axis displacement platforms are further included, and the light source module 2 , the first detector 31 and the second detector 4 are all arranged on the six-axis displacement platforms.

[0075] For example, the light source module 2 is fixed as a whole on a six-axis displacement platform (the six-axis displacement platform can adjust the XYZ position and height, αβ pitch angle, and θ rotation angle), meeting the conditions of light coupling-in area 10 with multiple degrees of freedom and different inclination angles incident on the optical waveguide.

[0076] For example, the second detector 4 and the third detector 5 are both equipped with a six-axis shift platform (the six-axis displacement platform can meet the adjustment of XYZ position and height, αβ pitch angle, and θ rotation angle) to achieve light efficiency testing of different inclination angles and different waveguide coupling areas.

[0077] In one embodiment, the integrating sphere body 30 is provided with a first opening, and the first detector 31 is opposite to the first opening.

[0078] Specifically, the light in the integrating sphere body 30 is transmitted to the first opening and received by the first detector 31, and the first detector 31 detects the light flux of the light source 20 in real time. For example, the first detector 31 covers the first opening to prevent the light inside the integrating sphere body 30 from leaking out from the first opening.

[0079] In one embodiment, the integrating sphere body 30 is provided with a second opening, and the compensator 32 is opposite to the second opening.

[0080] Specifically, the compensator 32 compensates the light through the second opening into the integrating sphere body 30. For example, the compensator 32 covers the second opening to prevent the light inside the integrating sphere body 30 from leaking out from the second opening.

[0081] In one embodiment, the compensator 32 is located on a first side of the integrating sphere body 30 , and the first detector 31 is located on a second side of the integrating sphere body 30 , and the first side and the second side are opposite to each other.

[0082] In this embodiment, the arrangement positions of the compensator 32 and the first detector 31 are limited so that the light supplemented by the compensator 32 can be directly received by the first detector 31, thereby avoiding light loss.

[0083] According to a second aspect of the embodiment of the present application, a method for testing an optical waveguide is provided. The testing method is applied to the testing system for the optical waveguide as described in the first aspect;

[0084] The test method includes:

[0085] Controlling the light beam emitted by the light source 20 to be transmitted to the beam splitter 22 to form a reflected light beam and a transmitted light beam;

[0086] Measuring the luminous flux according to the light beam received by the first detector 31;

[0087] Measure a first light signal according to the light received by the second detector 4;

[0088] Measure a second light signal according to the light received by the third detector 5;

[0089] A light efficiency parameter of the optical waveguide is obtained based on the light flux, the first light signal, and the second light signal.

[0090] In an embodiment of the present application, a method for testing an optical waveguide is provided, which realizes real-time measurement of the out-coupling light effect (the light effect on the out-coupling side of the out-coupling region of the optical waveguide (light effect - brightness value / light flux coupled into the optical waveguide)) and the leakage light effect (the light effect of the out-coupling region of the optical waveguide away from the out-coupling side) by measuring the light flux and the light signal in the out-coupling region of the optical waveguide in real time.

[0091] In one embodiment, the integrating sphere assembly 3 further includes a compensator 32;

[0092] The luminous flux measured according to the light beam received by the first detector 31 specifically includes:

[0093] The luminous flux is measured according to the reflected light beam received by the first detector 31 and the light beam emitted by the compensator 32 received by the first detector 31 .

[0094] In the embodiment of the present application, the luminous flux measured by the first detector 31 includes the luminous flux of the reflected light beam received by the first detector 31 and the luminous flux of the light emitted by the compensator 32 received by the first detector 31, which can measure the optical efficiency, light leakage and other optical indicators of the optical waveguide in real time and with high precision.

[0095] The above embodiments focus on the differences between the various embodiments. As long as the different optimization features between the various embodiments are not contradictory, they can be combined to form a better embodiment. Considering the simplicity of the text, they will not be repeated here.

[0096] Although some specific embodiments of the present application have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are only for illustration, not for limiting the scope of the present application. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present application. The scope of the present application is defined by the appended claims.

Claims

1. A testing system for an optical waveguide, characterized in that: The optical waveguide comprises a light coupling-in region (10) and a light coupling-out region (11); the test system comprises: a carrier, a light source module (2), an integrating sphere assembly (3), a second detector (4) and a third detector (5); The carrier is used to carry the optical waveguide; The light source module (2) comprises a light source (20) and a beam splitter (22), wherein the light beam emitted by the light source (20) is split into a transmitted light beam and a reflected light beam by the beam splitter (22), wherein the transmitted light beam is coupled into the light coupling-in area (10), and the reflected light beam is received by the integrating sphere assembly (3); The integrating sphere assembly (3) comprises an integrating sphere body (30) and a first detector (31), wherein the first detector (31) is located in the integrating sphere body (30), and the first detector (31) obtains luminous flux according to the light beam received by it; The second detector (4) is located at the light output side of the light output coupling area (11), and acquires a first light signal, wherein the first light signal is the brightness value of the light on the output coupling side; The third detector (5) is located on the backlight side of the light outcoupling area (11) and acquires a second light signal, wherein the second light signal is the brightness value of the light on the backlight outcoupling side.

2. The optical waveguide testing system according to claim 1, characterized in that: The integrating sphere body (30) is provided with a window (301); The testing system further comprises an optical fiber connection part (23) installed on the window (301) and connected to the beam splitter (22), wherein the optical fiber connection part (23) is used to transmit the reflected light beam to the integrating sphere body (30).

3. The optical waveguide testing system according to claim 1, characterized in that: The light source module (2) further comprises an adjustable diaphragm (21), wherein the adjustable diaphragm (21) is located between the light source (20) and the beam splitter (22).

4. The optical waveguide testing system according to claim 1, characterized in that: The integrating sphere assembly (3) further comprises a compensator (32), wherein the compensator (32) is located on the integrating sphere body (30).

5. The optical waveguide testing system according to claim 1, characterized in that: It also comprises a plurality of six-axis displacement platforms, on which the light source module (2), the second detector (4) and the third detector (5) are all arranged.

6. The optical waveguide testing system according to claim 1, characterized in that: The integrating sphere body (30) is provided with a first opening, and the first detector (31) is opposite to the first opening.

7. The optical waveguide testing system according to claim 4, characterized in that: The integrating sphere body (30) is provided with a second opening, and the compensator (32) is opposite to the second opening.

8. The optical waveguide testing system according to claim 4, characterized in that: The compensator (32) is located on a first side of the integrating sphere body (30), and the first detector (31) is located on a second side of the integrating sphere body (30), wherein the first side and the second side are opposite to each other.

9. A method for testing an optical waveguide, characterized in that: The testing method is applied to the testing system of the optical waveguide according to any one of claims 1 to 8; The test method includes: Controlling the light beam emitted by the light source (20) to be transmitted to the beam splitter (22) to form a reflected light beam and a transmitted light beam; Measuring luminous flux according to the light beam received by the first detector (31); measuring a first light signal according to the light received by the second detector (4); measuring a second light signal according to the light received by the third detector (5); A light efficiency parameter of the optical waveguide is obtained based on the light flux, the first light signal, and the second light signal.

10. The optical waveguide testing method according to claim 9, characterized in that: The integrating sphere assembly (3) further comprises a compensator (32); The luminous flux measured according to the light beam received by the first detector (31) specifically includes: The luminous flux is measured based on the reflected light beam received by the first detector (31) and the light beam emitted by the compensator (32) received by the first detector (31).

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