A high-precision adjustable uniform light source device

Abstract

This application is a high-precision adjustable uniform light source device, which includes an integrating sphere sub-sphere and an integrating sphere mother-sphere that are connected. A light source is installed on the integrating sphere sub-sphere, and the integrating sphere sub-sphere is optically connected to the integrating sphere mother-sphere through a variable aperture box. An adjustable aperture baffle is installed inside the variable aperture box, and one end of the aperture baffle is connected to a linear motor. The linear motor drives the aperture baffle to move horizontally to adjust the cross-sectional area of the optical path connecting the integrating sphere sub-sphere and the integrating sphere mother-sphere. A micro-aperture diaphragm cylinder is connected to the light outlet of the integrating sphere mother-sphere. The light emitted by the light source is subjected to primary light homogenization in the integrating sphere sub-sphere, the light intensity is adjusted by the variable aperture box, and then it enters the integrating sphere mother-sphere for secondary light homogenization. The uniformity of the radiant luminance output can be improved through two-stage light homogenization. Finally, the light energy is reduced by the micro-aperture diaphragm cylinder to complete the modulation of the output light source and meet the requirements of low-light test applications.

Description

Technical Field

[0001] The present invention relates to the technical field of low-light remote sensing technology, and particularly to a high-precision adjustable uniform light source device. Background Art

[0002] Low-light remote sensing technology can obtain the characteristics of the visible and near-infrared bands of the target under low-light conditions, and provide night low-light images with daytime resolution. With the expansion of the application scope and the subdivision of the application fields of low-light imaging data, the demand for high-resolution and large-dynamic-range low-light images is becoming stronger and stronger, and higher requirements are put forward for the performance of low-light imaging systems. Using a low-light integrating sphere with adjustable energy levels in a large dynamic range as a uniform light source is a necessary condition for completing the performance detection of low-light imaging systems.

[0003] For the adjustable light source device required for testing low-light imaging systems, at present, domestic universities and research institutions mostly use components such as tungsten halogen light sources, neutral filters, and integrating spheres to build. For example, Zhang Yuantao and Liu Yannian of the Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, carried out the "Research on Space High-Sensitivity Large-Dynamic-Range Low-Light Imaging Technology", and Liu Hui and Zhang Liming of the University of Science and Technology of China completed the "Research on Large-Dynamic-Range Radiation Standard Transfer Technology", etc. Most of them are in the laboratory state, with large light source volume, complex structure, and high energy consumption. In addition, the fine adjustment ability of the low-end output energy of the adjustable light source is insufficient, making it difficult to meet the requirements of fine adjustment of the input light source for the performance detection of low-light systems. Summary of the Invention

[0004] The purpose of the present invention is to solve the problems of large volume, high energy consumption of the existing low-light test light source, and insufficient fine adjustment ability of the low-end energy output of the light source. A high-precision adjustable uniform light source device is provided. By using a precision step control motor combined with a diamond-shaped adjustable aperture, while realizing the output of a light source in a large dynamic range, continuous adjustment of tiny illuminance values can be achieved. While meeting the application requirements of high-precision performance evaluation of low-light imaging systems, it has many advantages such as a compact structure, small occupied space, and strong anti-mechanical performance.

[0005] The technical solution of the present invention is as follows:

[0006] A high-precision adjustable uniform light source device includes an integrating sphere. The integrating sphere includes an integrating sphere sub-sphere and an integrating sphere mother-sphere arranged. A light source is installed on the integrating sphere sub-sphere. The integrating sphere sub-sphere is optically connected to the integrating sphere mother-sphere through a variable aperture box. An active aperture baffle is installed inside the variable aperture box. One end of the aperture baffle is connected to a linear motor. The linear motor drives the aperture baffle to move horizontally to adjust the cross-sectional area size of the optical path connecting the integrating sphere sub-sphere and the integrating sphere mother-sphere. A micro-aperture diaphragm cylinder is connected to the light exit of the integrating sphere mother-sphere.

[0007] In a further solution, light sources are evenly distributed and installed around the integrating sphere sub-sphere, and the light sources are tungsten halogen lamps or LED lamps.

[0008] In a further embodiment, the sub-sphere of the integrating sphere includes a sub-sphere outer shell and a hollow spherical sub-sphere inner container disposed therein. The light-emitting end of the light source is disposed in the hollow cavity of the sub-sphere inner container, and a light output channel communicating with the hollow cavity is provided at the bottom end of the sub-sphere of the integrating sphere.

[0009] In a further embodiment, the main-sphere of the integrating sphere includes a rectangular main-sphere outer shell and a hollow spherical main-sphere inner container disposed therein; an incident light port communicating with the sub-sphere of the integrating sphere and an output light port communicating with the micro-aperture diaphragm tube are provided on the main-sphere of the integrating sphere.

[0010] In a further embodiment, the variable aperture box includes a box body formed by docking an upper cover and a base. An upper cover light passing hole communicating with the sub-sphere of the integrating sphere is provided on the upper cover, and a base light passing hole communicating with the main-sphere of the integrating sphere is provided on the base; guide rails are symmetrically installed on both sides of the base, and sliders matching the guide rails are symmetrically installed on both sides of the aperture baffle. A baffle light passing hole is provided in the middle of the aperture baffle.

[0011] In a further preferred embodiment, the upper cover light passing hole is a circular hole, the base light passing hole and the baffle light passing hole are both diamond-shaped holes, and one diagonal of the diamond-shaped light passing hole on the base is collinear with the symmetry axis of the base; the upper cover light passing hole, the base light passing hole and the baffle light passing hole are arranged in a column.

[0012] The baffle light passing hole moves horizontally relative to the base light passing hole. Taking the vertex of the diamond-shaped base light passing hole close to the linear motor as the origin, the horizontal central axis of the base as the X-axis, and the straight line passing through the origin and perpendicular to the X-axis as the Y-axis, a rectangular coordinate system is established. Taking the direction away from the linear motor as the positive direction of the X-axis and the direction of rotating 90° counterclockwise around the X-axis as the positive direction of the Y-axis, when the vertices of the diamond-shaped holes of the base light passing hole and the baffle light passing hole correspond, the mathematical model of the cross-sectional area S of the optical path connecting the sub-sphere and the main-sphere of the integrating sphere after normalizing the horizontal moving distance L of the aperture baffle is:

[0013]

[0014] In a further embodiment, the variable aperture box is of a convex structure. The linear motor is disposed in the front box body of the variable aperture box, the aperture baffle is disposed in the rear box body of the variable aperture box, and the output shaft of the linear motor is fixedly connected to the aperture baffle.

[0015] In a further embodiment, the micro-aperture diaphragm tube is fixedly connected to the output light port of the main-sphere of the integrating sphere through a lens barrel adapter.

[0016] Further solution: The micro-aperture diaphragm cylinder includes a cylinder body, a combined diaphragm is arranged inside the cylinder body, and a pinhole diaphragm is installed at the outer end of the cylinder body.

[0017] Further solution: There are two groups of the combined diaphragms, and the diameter of the diaphragm hole in the middle is 3 mm; the pinhole diaphragm is fixedly installed at the outer end port of the cylinder body through a pinhole diaphragm seat, and the diameter of the diaphragm hole of the pinhole diaphragm is 0.2 mm. The diaphragm hole of the combined diaphragm, the diaphragm hole of the pinhole diaphragm and the light outlet on the mother sphere of the integrating sphere are on the same horizontal axis.

[0018] In this application, the minimum step distance of the linear motor is 20 μm, which can accurately control the diaphragm baffle to achieve micro-displacement movement, and then achieve accurate control of the output light intensity.

[0019] On both sides of the diaphragm baffle parallel to the long side of the base of the variable diaphragm box, they are respectively connected to the guide rails installed on the base through sliders and slide along the guide rails. The side perpendicular to the long side of the base and close to the linear motor is connected to the output shaft of the linear motor; the diaphragm baffle is pushed or contracted by the slider and the linear motor, so that the diamond-shaped light passing hole on the diaphragm baffle moves relative to the diamond-shaped light passing hole on the base, thereby controlling the cross-sectional area of the light passing hole.

[0020] Inside the micro-aperture diaphragm cylinder in this application, there are two groups of combined diaphragms and a pinhole diaphragm, which play a role in reducing the energy of the uniform light beam at the light outlet of the mother sphere of the integrating sphere by five layers, and limit the diameter of the uniform light beam passing through the pinhole diaphragm to 0.2 mm.

[0021] The present invention provides a high-precision adjustable uniform light source device, which has the following advantages:

[0022] 1. By controlling the minimum 20-μm step distance of the high-precision linear drive motor and reducing the energy of the micro-aperture diaphragm cylinder, a weak light source required for test conditions is obtained, and the adjustment of a small illuminance value can be achieved.

[0023] 2. Through the linear motor and the guide rail slider pair, the linear motion, positioning accuracy and stability of the diaphragm baffle can be effectively guaranteed, so as to ensure the stability and repeatability of the radiant luminance output of the test light source.

[0024] 3. In the light source device of this application, the integrating sphere adopts a design of connecting the mother sphere and the sub-sphere. The light emitted by the halogen tungsten lamp or LED lamp from the sub-sphere light source of the integrating sphere is subjected to primary light homogenization in the sub-sphere of the integrating sphere, the light intensity is adjusted by the variable diaphragm box, and then enters the mother sphere of the integrating sphere for secondary light homogenization. The uniformity of the radiant luminance output can be improved through two-stage light homogenization; finally, energy reduction (i.e., light illuminance attenuation) is performed through the micro-aperture diaphragm cylinder to meet the requirements of weak test applications.

[0025] 4. The integral sphere sub-sphere, variable aperture box, integral sphere mother-sphere, and micro-aperture diaphragm tube are designed with a compact structure, small space occupation, and tight installation between the components, with strong anti-mechanical properties. Description of the Drawings

[0026] Figure 1 is a schematic structural view of the present invention;

[0027] Figure 2 is Figure 1 a longitudinal sectional view of

[0028] Figure 3 is a schematic structural view of the variable aperture box in the present invention;

[0029] Figure 4 is Figure 3 a transverse sectional view of

[0030] Figure 5 is a curve graph showing the change of light energy with the moving distance of the aperture;

[0031] In the figure: 1 - integral sphere sub-sphere, 11 - sub-sphere outer shell, 12 - sub-sphere inner liner; 2 - light source; 3 - variable aperture box, 31 - front box body, 32 - rear box body, 33 - upper cover, 34 - base, 35 - upper cover light passing hole; 4 - micro-aperture diaphragm tube, 41 - first combined diaphragm, 42 - second combined diaphragm, 43 - pinhole diaphragm seat, 44 - pinhole diaphragm; 5 - lens barrel adapter seat; 6 - integral sphere mother-sphere, 61 - mother-sphere outer shell, 62 - mother-sphere inner liner; 7 - linear motor, 71 - output shaft; 8 - aperture baffle, 81 - baffle light passing hole, 82 - slider; 9 - guide rail. Detailed Embodiments

[0032] The present invention will be described in detail below with reference to the drawings and specific embodiments, but it is not intended to limit the present invention.

[0033] Referring to Figure 1 、 Figure 2 and Figure 3 , the present invention provides a high-precision adjustable uniform light source device, including an integral sphere, the integral sphere includes an integral sphere sub-sphere 1 and an integral sphere mother-sphere 6 which are connected and arranged, and a light source 2 is installed on the integral sphere sub-sphere 1. In order to achieve the regulation of the light intensity, a variable aperture box 3 is added between the integral sphere sub-sphere and the integral sphere mother-sphere, that is, the integral sphere sub-sphere 1 is optically connected to the integral sphere mother-sphere 6 through the variable aperture box 3; that is, the integral sphere sub-sphere 1, the variable aperture box 3, and the integral sphere mother-sphere 6 are arranged in a column, and the optical paths between the three are connected in a straight line; the whole device has a compact structure, greatly reducing the overall size.

[0034] Specifically, as shown in Figure 2 、 3As shown, the variable aperture box 3 includes a box body formed by docking an upper cover 33 and a base 34. An upper cover light passing hole 35 communicating with the sub-sphere 1 of the integrating sphere is provided on the upper cover 33, and a base light passing hole communicating with the mother-sphere 6 of the integrating sphere is provided on the base 34; a light output channel communicating with the hollow cavity is provided at the bottom end of the sub-sphere 1 of the integrating sphere; an incident light port communicating with the sub-sphere 1 of the integrating sphere is provided on the top end surface of the mother-sphere 6 of the integrating sphere, as Figure 2 , after the light emitted by the light source 2 is uniformly illuminated for the first time in the hollow cavity of the sub-sphere 1 of the integrating sphere, it passes through its light output channel and then passes through the upper cover light passing hole 35, the base light passing hole, and the incident light port in sequence and enters the hollow cavity of the mother-sphere 6 of the integrating sphere for secondary uniform illumination, and then enters the micro-aperture diaphragm cylinder 4.

[0035] As Figure 4 shown, a movable aperture baffle 8 is installed inside the variable aperture box 3. The aperture baffle 8 is arranged perpendicular to the optical path. In order to allow light to pass through, a baffle light passing hole 81 is provided in the middle of the aperture baffle 8. When all the light is to pass through, the baffle light passing hole 81 is in the middle of the upper cover light passing hole 35 and the base light passing hole and on the same vertical axis. One end of the aperture baffle 8 is connected to a linear motor 7. The linear motor 7 drives the aperture baffle 8 to move horizontally to adjust the cross-sectional area size of the optical path connecting the sub-sphere 1 and the mother-sphere 6 of the integrating sphere; specifically: guide rails 9 are symmetrically installed on both sides of the base 34, and sliders 82 matching the guide rails 9 are symmetrically and fixedly provided on both sides of the aperture baffle 8. An exit light port is provided on one side wall of the mother-sphere 6 of the integrating sphere, and a micro-aperture diaphragm cylinder 4 is fixedly connected to the exit light port. Specifically, the micro-aperture diaphragm cylinder 4 is connected to the exit light port of the mother-sphere 6 of the integrating sphere through a lens barrel adapter 5 to form an exit light path inside it. Specifically: one end of the lens barrel adapter is connected to the spherical shell of the exit light port of the mother-sphere of the integrating sphere by screws, and the other end is connected to the micro-aperture diaphragm cylinder by threads.

[0036] As Figure 2 shown, the micro-aperture diaphragm cylinder 4 includes a cylinder body. A combined aperture is arranged inside the cylinder body, and a pinhole aperture 44 is installed at the outer end of the cylinder body.

[0037] In a further solution, there are two groups of the combined apertures, and the diameter of the aperture in the middle of each group is 3 mm; the pinhole aperture 44 is installed at the outer end port of the cylinder body by a threaded connection through a pinhole aperture seat 43, and the diameter of the aperture of the pinhole aperture 44 is 0.2 mm. Each group of combined apertures is composed of two perforated screens. The incident light passes through the two groups of combined apertures and the pinhole aperture, realizing the function of reducing the energy of the uniform light beam at the exit light port of the mother-sphere of the integrating sphere by five layers, and limiting the diameter of the uniform light beam passing through the pinhole aperture 44 to 0.2 mm. The aperture of the combined aperture and the aperture of the pinhole aperture 44 are on the same horizontal axis as the exit light port on the mother-sphere 6 of the integrating sphere.

[0038] In practical applications, according to different test conditions, measures such as adjusting the variable aperture box, adjusting the combined aperture, the pinhole aperture, and replacing different aperture holes can be taken to meet the required test conditions.

[0039] During the test, turn on the tungsten halogen lamp or the LED lamp. The light emitted by it undergoes primary light homogenization inside the sub-sphere of the integrating sphere, and then enters the variable aperture box body 3 through the circular light passing holes at the bottom of the inner sub-sphere 12 and the outer sub-sphere 11. The position of the aperture baffle 8 is adjusted by the linear motor 7 so that the light passing hole 81 of the baffle corresponds to or offsets the light axis of the upper cover light passing hole 35 and the base light passing hole, achieving the purpose of adjusting the cross-sectional area of the optical path, and thus achieving the purpose of controlling and being able to finely control the light intensity.

[0040] In this embodiment, the linear motor 7 can achieve a minimum step distance of 20 μm, thus achieving the purpose of controlling and being able to finely control the light intensity; in addition, in order to reduce the offset of the aperture baffle 8 during the forward and backward displacement process and strengthen the mechanical structure performance of the aperture baffle 8, a guide rail slider pair is installed on both sides of the aperture baffle, so that the aperture baffle 8 maintains a linear motion during the displacement process, and at the same time, the mechanical structure support is increased.

[0041] In another embodiment, light sources 2 are uniformly installed around the integrating sphere sub-sphere 1, and the light sources 2 are tungsten halogen lamps or LED lamps.

[0042] In a further solution, the integrating sphere sub-sphere 1 includes an outer sub-sphere 11 and a hollow spherical inner sub-sphere 12 disposed therein. The inner wall of the inner sub-sphere 12 is sprayed with a diffuse reflection material. The end of the light source 2 is disposed in the hollow cavity of the inner sub-sphere 12, and the light generated by the light source 2 enters the hollow cavity of the integrating sphere sub-sphere 1 for primary light homogenization.

[0043] In a further solution, the integrating sphere main sphere 6 includes a rectangular main sphere outer shell 61 and a hollow spherical main sphere inner shell 62 disposed in the main sphere outer shell 61; the main sphere outer shell 61 is designed as a rectangular block structure for the convenience of assembly with other components. The inner wall of the main sphere inner shell 62 is sprayed with a diffuse reflection material, so that the incident light emitted from the integrating sphere sub-sphere light source and regulated by the variable aperture box becomes uniform light after multiple diffuse reflections in the main sphere inner shell 62. After secondary light homogenization by the integrating sphere main sphere, the incident light enters the micro-aperture diaphragm group from the light outlet of the integrating sphere main sphere.

[0044] The integrating sphere main sphere 6 is provided with a light inlet connected to the integrating sphere sub-sphere 1 and a light outlet connected to the micro-aperture diaphragm cylinder 4.

[0045] In a further solution, the light passing hole 35 of the upper cover is a circular hole, the light passing holes of the base and the baffle 81 are both rhombic holes and are equal, and one diagonal of the rhombic light passing hole on the base is collinear with the axis of symmetry of the base; the setting of the rhombic holes enables the diaphragm baffle 8 to perform relative movement on the incident light, thereby changing the area of the light passing hole of the light, and finally achieving the purpose of controlling the light intensity; the upper cover light passing hole 35, the base light passing hole and the baffle light passing hole 81 are arranged in a column.

[0046] Specifically, the baffle light passing hole 81 moves horizontally relative to the base light passing hole. Taking the vertex of the rhombic base light passing hole close to the linear motor 7 as the origin, taking the horizontal central axis of the base as the X-axis, and taking the line passing through the origin and perpendicular to the X-axis as the Y-axis, a rectangular coordinate system is established. Taking the direction away from the linear motor 7 as the positive direction of the X-axis and taking the direction of rotating 90° counterclockwise around the X-axis as the positive direction of the Y-axis. When the vertices of the rhombic holes of the base light passing hole and the baffle light passing hole correspond, the mathematical model of the cross-sectional area S of the optical path connecting the sub-sphere and the mother-sphere of the integrating sphere after normalizing the horizontal moving distance L of the diaphragm baffle 8 is:

[0047]

[0048] As Figure 5 shown in the figure, using MATLAB to simulate the diaphragm baffle with a rhombic baffle through-hole to cut off the connecting optical path between the sub-sphere and the mother-sphere of the integrating sphere, the obtained curve of the change of light energy with the moving distance of the diaphragm baffle shows that as the moving distance of the diaphragm baffle increases, the light energy decreases, indicating that the light source device of the present application can attenuate the illuminance, effectively realizes the weak light source required for the test conditions and can adjust the micro-illuminance value to achieve the effect of correcting the deviation.

[0049] In a further solution, the variable diaphragm box 3 is of a convex structure. The linear motor 7 is built in the front box body 31 of the variable diaphragm box 3, the diaphragm baffle 8 is built in the rear box body 32 of the variable diaphragm box 3, and the output shaft 71 of the linear motor 7 is fixedly connected to the diaphragm baffle 8.

[0050] Specifically, the top end of the upper cover 33 of the variable diaphragm box is provided with an installation interface that matches the bottom end of the sub-sphere 1 of the integrating sphere, and the upper cover light passing hole 35 on the upper cover corresponds to the position of the circular light output channel at the bottom of the sub-sphere of the integrating sphere; the bottom end surface of the base 34 of the variable diaphragm box is provided with an installation interface that matches the top surface of the mother-sphere of the integrating sphere, and the rhombic base light passing hole on the base 34 corresponds to the position of the light inlet on the mother-sphere of the integrating sphere.

[0051] Based on the above embodiments, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present invention. Therefore, the above description is only a preferred embodiment of the present application and is not used to limit the scope of implementation of the present application; that is, all equivalent transformations made according to the scope of the claims of the present application shall fall within the scope of protection of the claims of the present application.

Claims

1. A high-precision adjustable uniform light source device, including an integrating sphere, the integrating sphere includes an integrating sphere sub-sphere (1) and an integrating sphere mother-sphere (6) which are connected and arranged, Characterized in that: A light source (2) is installed on the integrating sphere sub-sphere (1), and the integrating sphere sub-sphere (1) is optically connected to the integrating sphere mother-sphere (6) through a variable aperture box (3); A diaphragm baffle (8) is installed inside the variable aperture box (3), one end of the diaphragm baffle (8) is connected to a linear motor (7), and the linear motor (7) drives the diaphragm baffle (8) to move horizontally to adjust the cross-sectional area size of the optical path connecting the integrating sphere sub-sphere (1) and the integrating sphere mother-sphere (6); A microporous diaphragm cylinder (4) is connected to the light outlet of the integrating sphere mother-sphere (6); The integrating sphere sub-sphere (1) includes a sub-sphere outer shell (11) and a hollow spherical sub-sphere inner liner (12) built therein. The light-emitting end of the light source (2) is placed in the hollow cavity of the sub-sphere inner liner (12). A light output channel communicating with the hollow cavity is opened at the bottom end of the integrating sphere sub-sphere (1); The integrating sphere mother-sphere (6) includes a rectangular mother-sphere outer shell (61) and a hollow spherical mother-sphere inner liner (62) built inside the mother-sphere outer shell (61); An incident light port communicating with the integrating sphere sub-sphere (1) and a light outlet communicating with the microporous diaphragm cylinder (4) are opened on the integrating sphere mother-sphere (6); The variable aperture box (3) includes a box body formed by docking an upper cover (33) and a base (34). An upper cover through-hole (35) communicating with the integrating sphere sub-sphere (1) is opened on the upper cover (33), and a base through-hole communicating with the incident light port of the integrating sphere mother-sphere (6) is opened on the base (34); Guide rails (9) are symmetrically installed on both sides of the base (34), sliders (82) matching the guide rails (9) are symmetrically installed on both sides of the diaphragm baffle (8), and a baffle through-hole (81) is opened in the middle of the diaphragm baffle (8).

2. A high-precision adjustable uniform light source device according to claim 1, Characterized in that: Light sources (2) are evenly distributed and installed around the integrating sphere sub-sphere (1), and the light sources (2) are tungsten halogen lamps or LED lamps.

3. A high-precision adjustable uniform light source device according to claim 1, Characterized in that: The upper cover through-hole (35) is a circular hole, and the base through-hole and the baffle through-hole (81) are both diamond-shaped holes; One diagonal of the diamond-shaped through-hole on the base is collinear with the symmetry axis of the base; The upper cover through-hole (35), the base through-hole and the baffle through-hole (81) are arranged in a column.

4. A high-precision adjustable uniform light source device according to claim 3, Characterized in that: The light passing hole (81) of the baffle moves horizontally relative to the light passing hole of the base. Taking the vertex of the diamond-shaped light passing hole of the base near the linear motor (7) as the origin, the central axis of the base in the horizontal direction as the X-axis, and the straight line passing through the origin and perpendicular to the X-axis as the Y-axis, a rectangular coordinate system is established. The positive direction of the X-axis is the direction away from the linear motor (7), and the positive direction of the Y-axis is the direction obtained by rotating the X-axis counterclockwise by 90°. When the vertices of the diamond-shaped holes of the base light passing hole and the baffle light passing hole correspond, the cross-sectional area of the optical path between the connected integrating sphere sub-sphere and the integrating sphere mother-sphere with respect to the horizontal movement distance L of the aperture baffle (8) After normalizing the mathematical model of is: 。 5. A high-precision adjustable uniform light source device according to claim 1, Characterized in that: The variable aperture box (3) has a convex-shaped structure. The linear motor (7) is built into the front box body (31) of the variable aperture box (3), and the aperture baffle (8) is built into the rear box body (32) of the variable aperture box (3). The output shaft (71) of the linear motor (7) is fixedly connected to the aperture baffle (8).

6. A high-precision adjustable uniform light source device according to claim 1, characterized in that: The micro-aperture diaphragm cylinder (4) is fixedly connected to the light outlet of the integrating sphere mother sphere (6) through a lens barrel adapter seat (5); The micro-aperture diaphragm cylinder (4) includes a cylinder body. A combined aperture is arranged inside the cylinder body, and a pinhole aperture (44) is installed at the light outlet position of the cylinder body.

7. A high-precision adjustable uniform light source device according to claim 6, characterized in that: There are two groups of the combined apertures, and the diameter of the aperture hole in the middle of the combined aperture is 3 mm; the pinhole aperture (44) is fixedly installed at the light outlet position of the cylinder body through a pinhole aperture seat (43), and the diameter of the aperture hole of the pinhole aperture (44) is 0.2 mm.

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