Device for detecting distribution uniformity of luminous intensity of light source

Abstract

The invention discloses a light source luminous intensity distribution uniformity detection device, which is characterized in that a detection table is arranged at the center of a base to install a detected light source, and an annular groove concentric with the detection table is arranged on the base to position and install a hemispherical detection cover, so that the detected light source is positioned on the sphere center of the detection cover; the side wall of the detection cover is provided with a plurality of through holes for installing a plurality of detection mechanisms, the luminous intensity of the to-be-detected light source at each position on the spherical surface is detected, and the luminous intensity distribution uniformity of the to-be-detected light source is obtained by integrating the plurality of detection mechanisms; the detection requirements of LED light sources with different specifications can be met by manufacturing the hemispherical detection covers with different diameters, and meanwhile, the light intensity on different spherical surfaces can be detected by selecting the detection covers with different radiuses for the same LED light source, so that the light intensity distribution on the spherical surfaces with different diameters can be obtained; therefore, the change of the luminous intensity at different positions away from the LED light source is calculated, the attenuation characteristic of the luminous intensity of the light source along with the distance is obtained, and the optimal working distance of the LED light source is measured.

Description

Technical Field

[0001] The present invention belongs to the technical field of light radiation measurement, and relates to a light radiation measurement device, in particular to a device for detecting the uniformity of the luminous intensity distribution of a light source. Background Art

[0002] Traditional LED light sources are typically point sources, emitting light from a single LED chip. This light has a certain degree of divergence, typically spherical or nearly spherical. Although LED light sources are point sources, their light often passes through lenses, reflectors, or secondary optical designs (such as the lens cover of the LED) to impart a certain degree of directionality. Currently, spherical light sources are increasingly being used as lighting equipment for various lighting and signaling applications, such as integrating spheres and fish-attracting lights.

[0003] Testing spherical light sources is key to ensuring their optical performance meets actual needs. Performance requirements for spherical light sources vary significantly across different fields, necessitating targeted testing. For example, integrating sphere light sources must provide stable spectral radiance and uniformity to calibrate the accuracy of remote sensing equipment. With the advancement of optical technology, the manufacturing and testing of spherical light sources has gradually become standardized. For example, GB / T 43971-2024 specifies in detail the test items for integrating spheres used for remote sensor calibration (such as spectral radiance, non-uniformity, and stability), as well as the laboratory environment, equipment requirements, and testing procedures for integrating sphere light sources. This standard covers core indicators such as spectral and planar / angular non-uniformity, providing the industry with a unified quality assessment standard. Traditional visual inspection of light source luminous intensity uniformity is inefficient and highly subjective. Summary of the Invention

[0004] In order to solve the technical problems existing in the background technology, the present invention proposes a detection device for the uniformity of the luminous intensity of a light source, which can quickly detect the luminous intensity of an LED point light source at various positions on a spherical surface and obtain the uniformity of the luminous intensity distribution of the light source.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] A device for detecting the uniformity of the luminous intensity distribution of a light source includes: a base, a detection cover, and multiple detection mechanisms. A detection platform is provided in the middle of the base to install the light source to be measured. The detection cover is a hemispherical hollow cover body. The base is provided with an annular groove adapted to the bottom surface of the detection cover to position the detection cover on the base. The annular groove is arranged concentrically with the detection platform. Multiple through holes are evenly opened on the side wall of the detection cover. Multiple detection mechanisms are respectively adapted to be installed in the multiple through holes. The detection mechanisms use photoelectric detection scanning to measure the luminous intensity of the light source to be measured.

[0007] Furthermore, multiple detection covers are provided, and the multiple detection covers are hemispherical hollow cover bodies with different diameters. The base is correspondingly provided with multiple concentrically arranged annular grooves, and the multiple detection covers can be adapted and installed in the multiple annular grooves one by one.

[0008] Furthermore, an annular plug is provided at the bottom of the detection cover, the inner diameter and outer diameter of the annular plug are respectively adapted to the inner diameter and outer diameter of the annular groove, and when the detection cover is positioned and installed on the base, the annular plug is adapted to be inserted into the annular groove.

[0009] Furthermore, an external thread is provided on the annular insert, an internal thread is provided in the annular groove, and the annular insert is threadedly connected to the annular groove.

[0010] Furthermore, the testing platform is arranged at the center of the base, and a mounting groove is provided at the center of the testing platform, and the light source to be tested is fixedly installed in the mounting groove through an adapter.

[0011] Furthermore, the light source to be tested is fixedly connected to the adapter, a positive pole plug rod and a negative pole plug rod are provided at the bottom of the adapter, and a positive pole jack and a negative pole jack are provided in the mounting groove, so that when the adapter is installed in the mounting groove, the adapter is electrically connected to the base.

[0012] Furthermore, the adapter is provided in a variety of different models, and the adapters of different models can provide a variety of different electrical interfaces to adapt to different LED light sources.

[0013] Furthermore, the multiple through holes formed on the side wall of the detection cover are all arranged along the radial direction of the hemispherical cover body, and the central axes of the multiple through holes pass through the center of the hemispherical cover body.

[0014] Beneficial effects of the present invention: The device for detecting the uniformity of the luminous intensity distribution of a light source provided in the present application is configured to install the light source to be measured by setting a detection platform at the center of the base, positioning and installing a hemispherical detection cover by setting an annular groove concentric with the detection platform on the base, so that the light source to be measured is located on the center of the sphere of the detection cover, and installing multiple detection mechanisms by opening multiple through holes on the side wall of the detection cover to detect the luminous intensity of the light source to be measured at various positions on the spherical surface, and to obtain the uniformity of the luminous intensity distribution of the light source to be measured by combining the luminous intensities of the light source to be measured at different positions on the spherical surface detected by the multiple detection mechanisms; by making hemispherical detection covers of different diameters, the detection requirements of LED light sources of different specifications can be met; at the same time, by selecting detection covers of different radii for the same LED light source, the luminous intensities on different spherical surfaces can be detected, and the light intensity distribution on spherical surfaces of different diameters can be obtained, thereby calculating the change in luminous intensity at different positions away from the LED light source, obtaining the attenuation characteristics of the luminous intensity of the light source with distance, and determining the optimal working distance of the LED light source. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1It is a structural schematic diagram of the present invention.

[0016] Figure 2 This is a schematic diagram of the installation of the light source to be tested of the present invention.

[0017] Figure 3 It is a structural schematic diagram of the base of the present invention.

[0018] Figure 4 It is a structural schematic diagram of the adapter of the present invention.

[0019] Figure 5 It is a structural schematic diagram of the detection cover of the present invention.

[0020] Figure 6 Schematic diagram of the detection mechanism of the present invention. DETAILED DESCRIPTION

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0022] like Figure 1-6 As shown, the present invention provides a device for detecting the uniformity of the luminous intensity distribution of a light source, comprising: a base 1, a detection cover 2, and multiple detection mechanisms 3. A detection platform 11 is provided in the middle of the base 1, and a light source 4 to be tested is fixedly mounted on the detection platform 11. Specifically, the detection platform 11 is provided at the center of the base 1, and a mounting groove 13 is provided in the center of the detection platform 11. The light source 4 to be tested is fixedly mounted in the mounting groove 13 via an adapter 5. The light source 4 to be tested is fixedly connected to the adapter 5. A positive plug rod 51 and a negative plug rod 52 are provided at the bottom of the adapter 5. A positive socket 14 and a negative socket 15 are provided in the mounting groove 13. When the adapter 5 is installed in the mounting groove 13, the adapter 5 is electrically connected to the base 1, the base 1 is connected to a power supply, and the light source 4 to be tested is powered through the adapter 5, greatly simplifying the power connection circuit of the light source 4 to be tested. The adapter 5 is provided in a variety of different models, and the different models of adapters 5 can provide a variety of different electrical interfaces to adapt to different LED light sources.

[0023] The detection cover 2 is a hemispherical hollow cover body. The base 1 is provided with an annular groove 12 that is adapted to the bottom surface of the detection cover 2 so as to position and install the detection cover 2 on the base 1. The annular groove 12 is concentrically arranged with the detection platform 11 so that when the detection cover 2 is positioned and installed on the base 1, the detection platform 11 is located on the center of the sphere of the detection cover 2. Among them, the detection cover 2 can be set in multiple numbers, and multiple detection covers 2 use hemispherical hollow cover bodies of different diameters, and a plurality of concentrically arranged annular grooves 12 are correspondingly provided on the base 1, so that the multiple detection covers 2 can be adapted and installed in the plurality of annular grooves 12 in a one-to-one correspondence. Specifically, an annular plug 22 is provided at the bottom of the detection cover 2. The inner diameter and outer diameter of the annular plug 22 are adapted to the inner diameter and outer diameter of the annular groove 12 respectively. When the detection cover 2 is positioned and installed on the base 1, the annular plug 22 is adapted to be inserted into the annular groove 12. The annular insert 22 is provided with an external thread, the annular groove 12 is provided with an internal thread, and the annular insert 22 is threadedly connected to the annular groove 12 .

[0024] The sidewalls of the detection cover 2 are uniformly provided with multiple through-holes 21, each with a diameter of 5 mm. Multiple detection mechanisms 3 are respectively adapted to be mounted within these through-holes 21. These detection mechanisms 3 utilize photoelectric detection scanning to measure the luminous intensity of the light source 4 under test. The through-holes 21 are arranged radially along the hemispherical cover, with their central axes passing through the center of the hemispherical cover. This ensures that the detection mechanisms 3 align with the optical axis of the light source 4 under test, enabling detection of the luminous intensity of the light source 4 along the direction of light transmission.

[0025] Specifically, the detection mechanism 3 includes: an optical fiber 31, an optical fiber coupler 32, a photodetector 33, and a collimator 34. The optical fiber 31 is installed on the detection cover 2 through the optical fiber coupler 32. The optical fiber coupler 32 is set on the detection cover 2. The optical fiber 31 and the collimator 34 are respectively connected to the two ends of the optical fiber coupler 32. The collimator 34 couples the radiation information of the light source 4 to be measured into the optical fiber 31 and transmits it to the photodetector 33 through the optical fiber 31. The photodetector 33 receives the radiation signal transmitted by the optical fiber 31. The photodetector 33 is a solar cell.

[0026] When working on this application, the light source 4 to be tested is first fixedly mounted on the test table 11, and the detection cover 2 is positioned and mounted on the base 1 so that the light source 4 to be tested is located at the center of the sphere of the detection cover 2. A plurality of detection mechanisms 3 are selected and installed in a plurality of through holes 21 on the detection cover 2 as needed. Then, the light source 4 to be tested is energized, and the light emitted by the light source 4 to be tested is received by the optical fiber 31 of the detection mechanism 3 and transmitted to the photodetector 33. The photodetector 33 converts the optical signal into an electrical signal and outputs it, thereby obtaining the luminous intensity of the light source 4 to be tested at that position. Then, the luminous intensity of the light source 4 to be tested at different positions detected by the plurality of detection mechanisms 3 is combined to obtain the uniformity of the luminous intensity distribution of the light source 4 to be tested. In actual specific work, the detection mechanism 3 can output three signals: the first is the illumination detection of the light source, which can not only obtain the luminous intensity of each point, thereby calculating the uniformity of the luminous intensity distribution of the light source (steady-state characteristics), but also calculate the instantaneous luminous characteristics (dynamic characteristics) of the light source; the second is the stroboscopic characteristics of the light source; and the third is the spectral characteristics of the light source (the output can be connected to the spectrometer). In addition, by making hemispherical detection covers 2 of different diameters, the detection requirements of LED light sources of different specifications can be met. At the same time, by selecting detection covers 2 of different radii for the same LED light source, the luminous intensity on different spherical surfaces can be detected, and the light intensity distribution on spherical surfaces of different diameters can be obtained. The change in luminous intensity at different positions away from the LED light source can also be calculated, thereby obtaining the attenuation characteristics of the luminous intensity of the light source with distance, and thus determining the optimal working distance of the LED light source.

[0027] The device for detecting the uniformity of the luminous intensity distribution of a light source provided in this application can be used in the following aspects after acquiring spherical light data:

[0028] 1. Evaluate the uniformity of luminous intensity distribution; by analyzing the luminous intensity data at different positions on the sphere, determine the uniformity of the light source to ensure its suitability for scenes requiring stable lighting (such as display backlights and lighting fixtures).

[0029] 2. Determine the optimal working distance of the light source; combine the spherical data of detection covers of different diameters, analyze the attenuation characteristics of light intensity with distance, determine the working distance with optimal light source performance, and guide product design and installation.

[0030] 3. Analyze the flicker characteristics; detect the instantaneous luminous characteristics of the light source, evaluate the flicker phenomenon, and avoid interference with visually sensitive applications (such as photography and medical equipment).

[0031] 4. Spectral characteristic detection: Use a spectrometer to analyze the spectral distribution of the light source and verify whether it meets specific requirements (such as the spectral band of plant growth lamps and the color temperature requirements of medical lighting).

[0032] 5. Product optimization and quality control: Optimize the optical design of the light source (such as lens and reflector structure) through data comparison, and conduct consistency testing during the production process to ensure that product performance meets standards.

[0033] The above content is merely an example and explanation of the structure of the present invention. Those skilled in the art may make various modifications or additions to the described specific embodiments or replace them in a similar manner. As long as they do not deviate from the structure of the invention or exceed the scope defined by the claims, they should all fall within the scope of protection of the present invention.

Claims

1. A device for detecting the uniformity of luminous intensity distribution of a light source, characterized in that: include: The invention relates to a base (1), a detection cover (2), and a plurality of detection mechanisms (3). A detection platform (11) is provided in the middle of the base (1) for mounting a light source (4) to be measured. The detection cover (2) is a hemispherical hollow cover. An annular groove (12) adapted to the bottom surface of the detection cover (2) is provided on the base (1) for positioning and mounting the detection cover (2) on the base (1). The annular groove (12) and the detection platform (11) are arranged concentrically. A plurality of through holes (21) are evenly opened on the side wall of the detection cover (2). The plurality of detection mechanisms (3) are respectively adapted to be mounted in the plurality of through holes (21). The detection mechanisms (3) utilize photoelectric detection scanning to measure the luminous intensity of the light source (4) to be measured.

2. The detection device according to claim 1, characterized in that A plurality of detection covers (2) are provided, and the plurality of detection covers (2) are hemispherical hollow cover bodies with different diameters. The base (1) is correspondingly provided with a plurality of concentrically arranged annular grooves (12), and the plurality of detection covers (2) can be adapted and installed in the plurality of annular grooves (12) in a one-to-one correspondence.

3. The detection device according to claim 1, characterized in that An annular insert (22) is provided at the bottom of the detection cover (2). The inner diameter and outer diameter of the annular insert (22) are respectively adapted to the inner diameter and outer diameter of the annular groove (12). When the detection cover (2) is positioned and mounted on the base (1), the annular insert (22) is adapted to be inserted into the annular groove (12).

4. The detection device according to claim 3, characterized in that An external thread is provided on the annular insert (22), an internal thread is provided in the annular groove (12), and the annular insert (22) is threadedly connected to the annular groove (12).

5. The detection device according to claim 1, characterized in that The detection platform (11) is arranged at the center of the base (1). A mounting groove (13) is provided at the center of the detection platform (11). The light source (4) to be tested is fixedly mounted in the mounting groove (13) via an adapter (5).

6. The detection device according to claim 5, characterized in that The light source (4) to be measured is fixedly connected to the adapter (5); a positive electrode plug rod (51) and a negative electrode plug rod (52) are provided at the bottom of the adapter (5); a positive electrode plug hole (14) and a negative electrode plug hole (15) are provided in the mounting groove (13); when the adapter (5) is installed in the mounting groove (13), the adapter (5) is electrically connected to the base (1).

7. The detection device according to claim 6, characterized in that The adapter (5) is provided with a plurality of different models, and the adapters (5) of the various different models can provide a plurality of different electrical interfaces to adapt to different LED light sources.

8. The detection device according to claim 1, characterized in that The plurality of through holes (21) formed on the side wall of the detection cover (2) are all arranged along the radial direction of the hemispherical cover body, and the central axes of the plurality of through holes (21) pass through the center of the hemispherical cover body.

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