High-precision calibration device of optical integrating sphere

Abstract

The utility model relates to the technical field of integrating spheres, in particular to a high-precision calibration device of an optical integrating sphere, which comprises a support, an integrating sphere mounted at the top of the support, a reflection station mounted on one side of the integrating sphere, a calibration component mounted on the reflection station and comprising a bottom plate, and a standard plate mounted on the bottom plate. One side of the integrating sphere facing the standard plate is provided with an irradiation port, and the outer wall of the integrating sphere is also provided with a light window. According to the high-precision calibration device for the optical integrating sphere, the integrating sphere is stably supported by the bracket, and high-precision calibration of the integrating sphere is realized through accurate matching of the reflection station and the calibration assembly. A standard plate in the calibration assembly serves as a calibration reference and is aligned with an irradiation opening of the integrating sphere, so that the accuracy and consistency of calibration are ensured. The integrating sphere adopts the design of two detachable semispherical shells, and is convenient to mount and dismount through a hinged support and a connecting plate, so that the internal maintenance and cleaning of the integrating sphere are facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of integrating sphere, concretely relates to high accuracy calibration device of optical integrating sphere. BACKGROUND

[0002] In the field of optical measurement and calibration, integrating spheres, as important optical components, are widely used in luminous flux measurement, light source distribution characteristic analysis, and optical system calibration, etc. Integrating spheres have a highly reflective inner surface, which can uniformly scatter incident light, thereby realizing the integral measurement of light energy. However, the performance of the integrating sphere will be affected by various factors during actual use, including changes in the reflectivity of the inner surface, structural deformation, and external light interference, etc., which will cause deviations in the measurement results.

[0003] In order to ensure the accuracy and reliability of the integrating sphere in actual application, it is particularly important to calibrate it with high precision. Traditional calibration methods often rely on manual operation, which is not only inefficient, but also difficult to ensure the accuracy and consistency of the calibration. In addition, the traditional calibration device is often complex in structure, which is not convenient for adjustment and maintenance, bringing many inconveniences to actual use. SUMMARY

[0004] The utility model aims at providing high accuracy calibration device of optical integrating sphere, to solve the problem that the performance of the integrating sphere will be affected by various factors during actual use, including changes in the reflectivity of the inner surface, structural deformation, and external light interference, etc., which will cause deviations in the measurement results.

[0005] To achieve the above purpose, the utility model provides high accuracy calibration device of optical integrating sphere, including support, its characterized in that: the top of support installs integrating sphere, the side of integrating sphere installs reflection station, installs calibration assembly on reflection station, calibration assembly includes bottom plate, installs standard plate on bottom plate, the side of standard plate opposite integrating sphere is provided with illumination port, the outer wall of integrating sphere is also provided with light window.

[0006] As a preferred, the integrating sphere is a spherical structure of cavity, which is composed of two hemispherical shells, one side of the two hemispherical shells is rotatably connected through a hinge seat, and the other side is provided with a connecting plate, and the two connecting plates are fixed through bolts.

[0007] As a preferred, one of the two hemispherical shells is welded and fixed on the support.

[0008] As a preferred, the top of the bottom plate is provided with a limiting ring, and the standard plate is arranged inside the limiting ring.

[0009] As preferred, the outer side of the limiting ring is threadedly connected with a sealing cover, and a gap is left between the inner side of the sealing cover and the top of the standard plate.

[0010] As preferred, an air extraction valve is installed on the sealing cover, and a sealing ring is installed on the inner wall of the sealing cover.

[0011] As preferred, a threaded rod is rotatably connected to the bottom of the bottom plate through a bearing, an inner thread is arranged on a fixing groove arranged on the inner side of the reflection station, and the threaded rod is threadedly connected with the fixing groove.

[0012] As preferred, a horizontal support plate is arranged at the bottom end of the support.

[0013] Compared with the prior art, the utility model has the beneficial effects that:

[0014] In the high-precision calibration device of the optical integrating sphere, the device stably supports the integrating sphere through the support, and realizes high-precision calibration of the integrating sphere through accurate cooperation of the reflection station and the calibration assembly. The standard plate in the calibration assembly serves as a calibration reference and is aligned with the illumination port of the integrating sphere, thereby ensuring calibration accuracy and consistency.

[0015] Secondly, the integrating sphere is designed as two detachable half-sphere shells, convenient installation and detachment are realized through the hinge base and the connecting plate, and internal maintenance and cleaning of the integrating sphere are facilitated.

[0016] Meanwhile, accurate adjustment and fixation of the calibration assembly on the reflection station are realized through thread connection of the threaded rod and the fixing groove, and calibration precision is further improved.

[0017] In addition, the limiting ring and the sealing cover in the calibration assembly, and the air extraction valve and the sealing ring on the sealing cover jointly constitute a closed calibration environment, effectively eliminate external light interference, ensure stability and reliability of the standard plate during storage, and make the next calibration more accurate. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a whole structure schematic view of the utility model;

[0019] Figure 2 It is a structure schematic view of the calibration assembly in the utility model;

[0020] Figure 3 It is a structure schematic view of the integrating sphere in the utility model;

[0021] Figure 4 It is a structure schematic view of the reflection station in the utility model;

[0022] Significance of each number in the drawing is as follows:

[0023] 1. Bracket; 2. Integrating sphere; 21. Irradiation port; 22. Reflection station; 221. Fixing groove; 23. Light window; 24. Connecting plate; 25. Hinge; 3. Calibration assembly; 31. Base plate; 32. Limiting ring; 33. Standard plate; 34. Threaded rod; 4. Sealing cover; 41. Evacuation valve; 42. Sealing ring. Detailed Implementation

[0024] 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.

[0025] This invention provides a high-precision calibration device for an optical integrating sphere, such as... Figures 1-4 As shown, the system includes a support 1, an integrating sphere 2 mounted on top of the support 1, a reflection station 22 mounted on one side of the integrating sphere 2, and a calibration assembly 3 mounted on the reflection station 22. The calibration assembly 3 includes a base plate 31, on which a standard plate 33 is mounted. An illumination port 21 is provided on the side of the integrating sphere 2 facing the standard plate 33, and a light window 23 is also provided on the outer wall of the integrating sphere 2. By designing a complete system including the support 1, the integrating sphere 2, the reflection station 22, and the calibration assembly 3, and especially the precise alignment of the standard plate 33 in the calibration assembly 3 with the illumination port 21 of the integrating sphere 2, high-precision calibration of the optical integrating sphere is achieved. This design ensures the accuracy and reliability of the measurement or testing process and improves the performance of the optical integrating sphere during use.

[0026] The reflection station 22 and calibration component 3 mounted on one side of the integrating sphere 2 enable the entire device to maintain high precision while also possessing high flexibility and practicality. Users can easily adjust the position of the calibration component or replace the standard plate as needed to adapt to different testing scenarios or requirements.

[0027] The illumination port 21 on the integrating sphere 2, together with the standard plate 33 facing it and the light window 23 on the outer wall, constitute an optimized optical path system. This design helps to reduce light loss and scattering, improve light utilization and measurement accuracy, thereby further enhancing the working efficiency of the optical integrating sphere.

[0028] Improving testing efficiency: The use of a high-precision calibration device can significantly shorten testing time and improve testing efficiency. This is because the device can complete the calibration process quickly and accurately, reducing the time spent on repeated testing or adjustments due to inaccurate calibration.

[0029] In this embodiment, the integrating sphere 2 is a hollow spherical structure composed of two hemispherical shells, one side of which is rotatably connected through a hinge base 25, and the other side is provided with a connecting plate 24, and the two connecting plates 24 are fixedly connected through bolts. This design makes the integrating sphere 2 easy to open and close, and facilitates cleaning, maintenance or replacement of internal components. At the same time, the connecting plate 24 fixedly connected by bolts ensures the stability and sealing of the integrating sphere 2 during use.

[0030] Specifically, one of the two hemispherical shells is welded and fixed on the support 1. This improves the stability and durability of the entire device. At the same time, this fixing method also simplifies the installation and disassembly process.

[0031] Further, the top of the bottom plate 31 is provided with a limiting ring 32, and a standard plate 33 is arranged inside the limiting ring 32. The design of the limiting ring 32 limits the position of the standard plate 33, ensuring its stability and accuracy during calibration. At the same time, this design also facilitates the replacement or adjustment of the standard plate 33.

[0032] Further, the outer side of the limiting ring 32 is threadedly connected with a sealing cover 4, and a gap is left between the inner side of the sealing cover 4 and the top of the standard plate 33. This facilitates the protection of the standard plate 33, avoiding surface aging or damage when not in use.

[0033] Further, the sealing cover 4 is provided with an air extraction valve 41, and the inner wall of the sealing cover 4 is provided with a ring of sealing rings 42. The interior is vacuumized to avoid aging of the standard plate 33 when placed for a long time.

[0034] Further, the bottom of the bottom plate 31 is rotatably connected with a threaded rod 34 through a bearing, and the inner side of the reflection station 22 is provided with a fixed groove 221, which is provided with an internal thread, and the threaded rod 34 is threadedly connected with the fixed groove 221. This design makes the calibration assembly 3 can be conveniently installed by rotating the threaded rod 34.

[0035] Further, the bottom end of the support 1 is provided with a horizontal support plate. The design of the support plate provides additional support and stability to the entire device, ensuring its firmness during testing. At the same time, the horizontal support plate also facilitates the placement of the entire device on a flat surface, improving its practicality.

[0036] The high-precision calibration device for optical integrating sphere in the utility model is used, first of all, to ensure that the entire calibration device is stably placed on the horizontal support plate, to ensure the stability during calibration. Check whether the integrating sphere 2 is tightly connected through the connecting plate 24 and the bolt, to ensure the sealing and stability of the integrating sphere. Confirm that the bottom plate 31 of the calibration assembly 3 is firmly connected with the fixed groove 221 of the reflection station 22 through the threaded rod 34, and can be finely adjusted by rotating the threaded rod 34, to realize the accurate alignment of the calibration assembly 3.

[0037] Open the sealing cover 4, place the standard plate 33 inside the limiting ring 32, and ensure its stable position.

[0038] The light emitted by the external light source (not shown) is emitted to the irradiation port 21 of the integrating sphere 2, and after multiple reflections inside the integrating sphere, the light is finally emitted through the light window 23. Adjust the position of the calibration assembly 3, especially the relative position of the standard plate 33 and the irradiation port 21, to ensure that the light can accurately irradiate the standard plate 33 and reflect back into the integrating sphere. By observing or measuring the intensity, distribution, etc. of the light reflected back into the integrating sphere, the calibration effect of the integrating sphere is evaluated. If necessary, the position of the calibration assembly 3 can be fine-tuned by rotating the threaded rod 34 until the best calibration effect is achieved.

[0039] After calibration is completed, a series of tests can be performed to verify the accuracy of the calibration. For example, a light source with a known light intensity distribution can be used for irradiation, and the light intensity distribution output by the integrating sphere can be measured and compared with the expected result. If the test result meets the requirements, the calibration is successful; if the test result is not satisfactory, the integrating sphere 2 needs to be processed again to further improve the accuracy, and the calibration process is performed again until a satisfactory calibration effect is achieved.

[0040] After a period of use, the integrating sphere 2 can be cleaned and maintained by opening the two hemispherical shells to clean the internal dust or replace damaged parts. Regularly check the standard plate 33 and sealing cover 4 of the calibration assembly 3, etc. to ensure that they are in good working condition.

[0041] When not in calibration, close the sealing cover 4 and evacuate the air inside the sealing cover 4 through the air evacuation valve 41 to form a vacuum environment, thereby prolonging the service life of the standard plate 33 and avoiding its aging. The sealing ring 42 ensures the sealing between the sealing cover 4 and the bottom plate 31.

[0042] The basic principles, main features and advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only preferred examples of the present application and do not limit the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A high-precision calibration device for an optical integrating sphere, comprising a support (1), characterized in that: The top of the support (1) is provided with an integrating sphere (2), one side of the integrating sphere (2) is provided with a reflection station (22), the reflection station (22) is provided with a calibration assembly (3), the calibration assembly (3) comprises a bottom plate (31), the bottom plate (31) is provided with a standard plate (33), one side of the integrating sphere (2) opposite to the standard plate (33) is provided with an irradiation port (21), and the outer wall of the integrating sphere (2) is further provided with a light window (23).

2. A high precision calibration apparatus for an optical integrating sphere according to claim 1, characterized in that: The integrating sphere (2) is a hollow spherical structure composed of two half-sphere shells, one side of the two half-sphere shells is rotationally connected through a hinge base (25), and the other side is provided with a connecting plate (24), and the two connecting plates (24) are fixed through bolt connection.

3. A high precision calibration apparatus for an optical integrating sphere according to claim 2, characterized in that: One of the two half-sphere shells is welded and fixed on the support (1).

4. The high precision calibration apparatus for an integrating sphere according to claim 1, characterized in that: The top of the bottom plate (31) is provided with a limiting ring (32), and the standard plate (33) is arranged inside the limiting ring (32).

5. A high precision calibration apparatus for an optical integrating sphere according to claim 4, characterized in that: The outer side of the limiting ring (32) is threadedly connected with a sealing cover (4), and a gap is formed between the inner side of the sealing cover (4) and the top of the standard plate (33).

6. A high precision calibration apparatus for an optical integrating sphere according to claim 5, characterized in that: The sealing cover (4) is provided with an air extraction valve (41), and the inner wall of the sealing cover (4) is provided with a sealing ring (42).

7. The high precision calibration apparatus for an optical integrating sphere according to claim 1, characterized in that: The bottom of the bottom plate (31) is rotationally connected with a threaded rod (34) through a bearing, the inner side of the reflection station (22) is provided with a fixing groove (221), the fixing groove (221) is provided with an internal thread, and the threaded rod (34) is threadedly connected with the fixing groove (221).

8. The high precision calibration apparatus for an optical integrating sphere according to claim 1, characterized in that: The bottom end of the support (1) is provided with a horizontal support plate.

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