A device for measuring reflectivity of integrating sphere

Abstract

The present invention proposes a device for measuring the reflectivity of an integrating sphere, which relates to the field of optical detection technology, and includes a spherical box, a transparent ball is fixedly installed in the spherical box, a gap is provided between the inner wall of the spherical box and the outer wall of the transparent ball, and the gap between the spherical box and the transparent ball forms a filling chamber. The present invention proposes a device for measuring the reflectivity of an integrating sphere, which is used to fill a sample material into the filling chamber by setting a spherical box, a transparent ball, a light inlet tube, a receiving tube, a loading mechanism and a discharging structure, so that the sample material is wrapped in the outer wall of the transparent ball, and the sample material wrapped in the outer wall of the transparent ball forms a spherical surface, and light is irradiated on the sample material on the spherical surface to generate diffuse reflection, and then the reflectivity of the sample material is detected. When measuring the reflectivity of different sample materials, different sample materials can be quickly replaced and a spherical surface can be formed for testing while reducing costs. The operation is simple and convenient, and the measurement efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of optical detection, and in particular to a device for measuring reflectivity of an integrating sphere. Background Art

[0002] The integrating sphere is a hollow sphere with a white diffuse reflective material on the inner wall, also known as a photometric sphere, a light flux sphere, etc. One or more windows are opened on the sphere wall, which are used as light inlet holes and receiving holes for placing light receiving devices. The inner wall of the integrating sphere should be a good spherical surface, and it is usually required that its deviation from the ideal spherical surface should not be greater than 0.2% of the inner diameter. The inner wall of the sphere is coated with an ideal diffuse reflective material, that is, a material with a diffuse reflectance close to 1. Commonly used materials are magnesium oxide or barium sulfate, which are mixed evenly with a colloid adhesive and sprayed on the inner wall.

[0003] At present, when measuring the reflectivity of various materials, it is usually necessary to prepare multiple integrating spheres, mix different sample materials with glue and then coat them on the inner wall of the integrating sphere, emit light into the integrating sphere, and then use a photometer to detect the reflectivity of the sample material. In this way, a large number of integrating spheres need to be prepared, and after spraying the sample material, when other materials need to be tested, the sample material on the inner wall of the integrating sphere needs to be scraped off, which wastes time and affects work efficiency, or a new integrating sphere needs to be replaced, resulting in increased costs and waste of materials (unqualified integrating spheres need to be discarded or the material on the inner wall needs to be scraped off). Summary of the invention

[0004] Based on the technical problems existing in the background technology, the present invention proposes a device for measuring the reflectivity of an integrating sphere.

[0005] The present invention provides a device for measuring reflectivity of an integrating sphere, comprising a spherical box, a transparent ball fixedly installed in the spherical box, a gap between the inner wall of the spherical box and the outer wall of the transparent ball, a filling chamber formed by the gap between the spherical box and the transparent ball, a light inlet tube installed on the spherical box, one end of the light inlet tube abutting against the outer periphery of the transparent ball, and a receiving tube installed on the spherical box, one end of the receiving tube abutting against the outer periphery of the transparent ball;

[0006] A loading mechanism is installed on the top of the spherical box, and the loading mechanism is used to load the sample material into the filling chamber, and the sample material is wrapped around the outer periphery of the transparent ball;

[0007] A discharge structure is installed at the bottom of the spherical box, and the discharge structure is used to discharge the sample material in the filling chamber.

[0008] Preferably, the loading mechanism includes a lower hopper, a motor, a dredge plug and an auxiliary component; the lower hopper is fixedly mounted on the top of the spherical box, and the bottom opening of the lower hopper is connected to the top of the filling chamber, the motor is fixedly mounted on the lower hopper, and the auxiliary component is installed between the output shaft of the motor and the dredge plug, and the dredge plug can block the bottom opening of the lower hopper.

[0009] Preferably, the auxiliary component includes a rotating column, a hexagonal column, an ejection spring, a rotating rod and an auxiliary frame; the rotating column is fixedly connected to the output shaft of the motor, the bottom end of the rotating column is provided with a telescopic hole that slidably cooperates with the hexagonal column, the ejection spring is installed in the telescopic hole, the two ends of the ejection spring are respectively abutted against the top inner wall of the telescopic hole and the top end of the ejection spring, the bottom end of the hexagonal column is fixedly connected to the rotating rod, the bottom end of the rotating rod is fixedly connected to the top end of the dredging plug, the auxiliary frame is fixedly installed on the inner wall of the lower hopper, the rotating rod passes through the auxiliary frame, the outer periphery of the rotating rod is fixedly connected with a slider, and the inner wall of the auxiliary frame is provided with a motion slide groove that slidably cooperates with the slider;

[0010] When the motor drives the auxiliary frame to rotate clockwise, the slider can move downward on the auxiliary frame, and when the motor drives the auxiliary frame to rotate counterclockwise, the slider can move upward on the auxiliary frame.

[0011] Preferably, the motion slide includes an annular wave track, an annular track and an inclined connecting track; the annular wave track is a wave-shaped track, the annular wave track is located above the annular track, the inclined connecting track is arranged obliquely on the inner wall of the auxiliary frame, and the two ends of the inclined connecting track are respectively connected to the annular wave track and the annular track;

[0012] A guide structure is provided at the connection point between the annular track and the inclined connecting track.

[0013] Preferably, the guide structure includes a guide block and a torsion spring; a receiving groove is provided on the bottom inner wall at the connecting port between the annular track and the inclined connecting track, one end of the guide block is rotatably installed in the receiving groove, the torsion spring is mounted on the rotating shaft of the guide block, the guide block can be rotatably received in the receiving groove, and the torsion spring is used to drive the guide block to rotate outside the receiving groove.

[0014] Preferably, the unloading structure includes a discharge barrel, a cross, a threaded rod and a sealing plug; the discharge barrel is connected to the bottom of the filling chamber, the cross is fixedly mounted on the inner wall of the discharge barrel, the threaded rod threads penetrate the cross, the sealing plug is fixedly mounted on the top of the threaded rod, and the sealing plug can seal the top opening of the discharge barrel.

[0015] Preferably, a squeezing mechanism is also installed on the spherical box, and the squeezing mechanism is used to squeeze the sample material in the filling chamber, and can drive the sample materials in the filling chamber to press against each other.

[0016] Preferably, the extrusion mechanism includes an annular cover and a soft rubber membrane; the annular cover is fixedly mounted on the outer periphery of the spherical box, the opening on the spherical box is connected to the annular cover, the soft rubber membrane is fixedly mounted in the opening, and the soft rubber membrane can block the opening, and the annular cover is connected to the air pump.

[0017] Preferably, the extrusion mechanism further comprises a supporting net, and the supporting net is fixedly installed in the annular cover.

[0018] Preferably, it further comprises a spherical outer shell; the spherical box is fixedly installed in the spherical outer shell, and support legs are installed at the bottom of the spherical outer shell.

[0019] The device for measuring the reflectivity of an integrating sphere proposed by the present invention has the following beneficial effects: by providing a spherical box, a transparent ball, a light inlet tube, a receiving tube, a loading mechanism and a discharging structure, a sample material is filled into a filling chamber so that the sample material is wrapped on the outer wall of the transparent ball, and the sample material wrapped on the outer wall of the transparent ball forms a spherical surface. Light is irradiated on the sample material on the spherical surface to generate diffuse reflection, and then the reflectivity of the sample material is detected. When measuring the reflectivity of different sample materials, different sample materials can be quickly replaced and a spherical surface can be formed for testing while reducing costs. The operation is simple and convenient, and the measurement efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall structure of a device for measuring reflectivity of an integrating sphere proposed by the present invention;

[0021] Figure 2 A cross-sectional view of a device for measuring reflectivity of an integrating sphere proposed by the present invention;

[0022] Figure 3 A three-dimensional cross-sectional view of a device for measuring reflectivity of an integrating sphere proposed by the present invention;

[0023] Figure 4 A three-dimensional structural cross-sectional view of a squeezing mechanism in a device for measuring reflectivity of an integrating sphere proposed by the present invention;

[0024] Figure 5 A cross-sectional view of a feed hopper in a device for measuring reflectivity of an integrating sphere proposed by the present invention;

[0025] Figure 6 A structural cross-sectional view of an auxiliary component in a device for measuring reflectivity of an integrating sphere proposed by the present invention;

[0026] Figure 7 A schematic diagram of the structure of a dredging plug, a hexagonal prism, a rotating rod and a sliding block in a device for measuring reflectivity of an integrating sphere proposed by the present invention;

[0027] Figure 8 This is a schematic diagram of a structure in which a moving slideway is laid out flat on the inner wall of an auxiliary frame in a device for measuring reflectivity of an integrating sphere proposed by the present invention;

[0028] Fig. 9 A device for measuring reflectivity of an integrating sphere proposed by the present invention Figure 8 Enlarged view of point A in the middle;

[0029] Fig.10 The present invention provides a cross-sectional view of a discharging structure in a device for measuring reflectivity of an integrating sphere.

[0030] In the figure: 1. spherical box; 2. transparent ball; 3. light inlet tube; 4. receiving tube; 5. lower hopper; 6. motor; 7. dredging plug; 8. rotating column; 9. hexagonal prism; 10. ejection spring; 11. rotating rod; 12. auxiliary frame; 13. slider; 14. annular wavy track; 15. annular track; 16. inclined connecting track; 17. guide block; 18. discharge barrel; 19. cross; 20. threaded rod; 21. sealing plug; 22. annular cover; 23. soft rubber membrane; 24. support net; 25. spherical shell. DETAILED DESCRIPTION

[0031] Reference Figure 1-Figure 10The present invention provides a device for measuring the reflectivity of an integrating sphere, comprising a spherical box 1, in which a transparent ball 2 is fixedly installed, the spherical box 1 and the transparent ball 2 have the same center, and the transparent ball 2 is a solid resin ball. The purpose of the transparent ball 2 being solid is to reduce the interference of refraction on the measurement result, and the gap between the transparent ball 2 and the sample material is negligible (the existing sample material needs to be uniformly mixed with a colloid adhesive, which is usually an acrylic adhesive and is usually transparent. The colloid adhesive will wrap the particles of the sample material and will also cause refraction, resulting in Refraction is also negligible), there is a gap between the inner wall of the spherical box 1 and the outer wall of the transparent ball 2, the gap between the spherical box 1 and the transparent ball 2 forms a filling chamber, a light inlet tube 3 is installed on the spherical box 1, one end of the light inlet tube 3 is against the outer periphery of the transparent ball 2, a receiving tube 4 is also installed on the spherical box 1, one end of the receiving tube 4 is against the outer periphery of the transparent ball 2, the end of the light inlet tube 3 and the end of the receiving tube 4 are fixedly connected to the transparent ball 2, the transparent ball 2 is fixed in the spherical box 1 through the light inlet tube 3 and the receiving tube 4, and a loading mechanism is installed on the top of the spherical box 1, the loading mechanism is used to put the sample The sample material is loaded into the filling chamber (the sample material is in the form of sand particles), and the sample material is wrapped around the outer periphery of the transparent ball 2. A discharge structure is installed at the bottom of the spherical box 1, and the discharge structure is used to discharge the sample material in the filling chamber. In actual operation, the sample material is filled into the filling chamber through the loading mechanism, so that the sample material is wrapped around the outer periphery of the transparent ball 2. The sample material in the filling chamber forms a spherical structure, and light is emitted into the transparent ball 2. The light is then irradiated on the sample material wrapped around the outer periphery of the transparent ball 2, and the sample material produces diffuse reflection to reflect the light into the transparent ball 2. , and then the receiver of the photometer in the receiving tube 4 receives the light, thereby measuring the reflectivity of the sample material. When it is necessary to detect the reflectivity of different sample materials, the sample material in the filling chamber is discharged through the unloading structure at the bottom of the spherical box 1, and then the sample material in the filling chamber is discharged, and new sample materials are reloaded into the filling chamber. The reflectivity of the sample material can continue to be measured, and new sample materials can be quickly replaced for testing. There is no need to prepare multiple integrating spheres for operation. The operation is simple and convenient, which can improve work efficiency and reduce purchase costs.

[0032] In actual practice, the sample material and the colloid adhesive are evenly mixed, and then the mixture is evenly coated on the inner wall of the integrating sphere, and then light is emitted into the integrating sphere through the light inlet. The light is irradiated on the inner wall of the integrating sphere coated with the sample material, and the sample material diffusely reflects the light. The diffusely reflected light is then received by a photometer receiver installed in the receiving tube 4 to determine the reflectivity of the sample material. When it is necessary to measure the reflectivity of multiple sample materials, it is necessary to prepare multiple integrating spheres, and then coat the sample materials on the inner wall of the integrating sphere and measure them separately, or remove the sample materials on the inner wall of the integrating sphere, and then re-coat various sample materials for testing, which wastes time and is inconvenient to operate.

[0033] like Figure 1 , Figure 2 , Figure 3 , Figure 5 , Figure 6 and Figure 7As shown in, the loading mechanism includes a lower hopper 5, a motor 6, a dredging plug 7 and an auxiliary component; the lower hopper 5 is fixedly installed on the top of the spherical box 1, a feed port is provided on the top of the lower hopper 5, and the bottom opening of the lower hopper 5 is communicated with the top of the filling chamber, the motor 6 is fixedly installed on the lower hopper 5, the auxiliary component is installed between the output shaft of the motor 6 and the dredging plug 7, the dredging plug 7 can block the bottom opening of the lower hopper 5, the auxiliary component includes a rotating column 8, a hexagonal prism 9, an ejection spring 10, a rotating rod 11 and an auxiliary frame 12; the rotating column 8 is fixedly connected to the output shaft of the motor 6, the bottom end of the rotating column 8 is provided with a telescopic hole that slides with the hexagonal prism 9, the ejection spring 10 is installed in the telescopic hole, the two ends of the ejection spring 10 are respectively against the top inner wall of the telescopic hole and the top of the ejection spring 10, the bottom end of the hexagonal prism 9 is fixedly connected to the rotating rod 11, and the rotating rod 11 The bottom end is fixedly connected with the top end of the dredging plug 7, the auxiliary frame 12 is fixedly installed on the inner wall of the lower hopper 5, the rotating rod 11 passes through the auxiliary frame 12, and the outer periphery of the rotating rod 11 is fixedly connected with a slider 13, and the inner wall of the auxiliary frame 12 is provided with a motion slide groove that slides with the slider 13; when the motor 6 drives the auxiliary frame 12 to rotate clockwise, the slider 13 can move downward on the auxiliary frame 12, and when the motor 6 drives the auxiliary frame 12 to rotate counterclockwise, the slider 13 can move upward on the auxiliary frame 12, and the motion slide groove includes an annular wave track 14, an annular track 15 and an inclined connecting track 16; the annular wave track 14 is a wavy line track, the annular wave track 14 is located above the annular track 15, the inclined connecting track 16 is obliquely arranged on the inner wall of the auxiliary frame 12, and the two ends of the inclined connecting track 16 are respectively connected with the annular wave track 14 and the annular track 15;In actual situations, the sample material is poured into the lower hopper 5, and the motor 6 is operated. The output shaft of the motor 6 rotates to drive the rotating column 8 to rotate, and then the rotating column 8 drives the hexagonal prism 9 to rotate and rotate synchronously with the rotating rod 11. The rotating rod 11 drives the slider 13 to rotate, so that the slider 13 slides upward in the inclined connecting track 16 until the slider 13 enters the annular wavy track 14. The slider 13 performs reciprocating lifting motion in the annular wavy track 14, thereby driving the rotating rod 11 and the dredging plug 7 to rotate and reciprocately lift and move synchronously. The rotating rod 11 drives the hexagonal prism 9 to rise in the telescopic hole, and the raised hexagonal prism 9 squeezes the ejection spring 10. The reciprocating lifting and rotating dredging plug 7 stirs the sample material in the lower hopper 5, thereby facilitating the stirring of the sample material, thereby facilitating the injection of the sample material into the filling chamber. After the sample material is completely injected into the filling chamber After entering the chamber, the motor 6 drives the rotating column 8 to rotate clockwise. Under the rebound effect of the ejection spring 10, the ejection spring 10 makes the rotating column 8, the hexagonal prism 9, the rotating rod 11 and the slider 13 have a tendency to move downward. When the slider 13 slides to the connection point between the annular wave track 14 and the inclined connecting track 16, the slider 13 enters the inclined connecting track 16 and gradually descends along the inclined connecting track 16 to the annular track 15. When the slider 13 enters the annular track 15, the dredging plug 7 abuts against the bottom inner wall of the lower hopper 5 and blocks the bottom opening of the lower hopper 5, thereby reducing the sample material from coming out of the bottom opening of the lower hopper 5. The sample materials in the filling chamber are squeezed against each other by gravity to form a spherical surface. The light irradiated on the spherical surface can form diffuse reflection, completing the reflectivity measurement of the sample material. ;

[0034] In actual situations, under the influence of gravity and the rebound of the ejection spring 10, when the motor 6 drives the slider 13 to rotate counterclockwise, the slider 13 cannot enter the inclined connecting track 16. It is necessary to set a guide structure to guide the slider 13 into the inclined connecting track 16 when the slider 13 rotates counterclockwise.

[0035] like Figure 5 , Figure 6 , Figure 7 , Figure 8 and Fig. 9 As shown in the figure, a guide structure is provided at the connection point between the annular track 15 and the inclined connecting track 16, and the guide structure includes a guide block 17 and a torsion spring; a receiving groove is provided on the bottom inner wall of the connection port between the annular track 15 and the inclined connecting track 16, and one end of the guide block 17 is rotatably installed in the receiving groove, and the torsion spring is mounted on the rotating shaft of the guide block 17, and the guide block 17 can be rotatably received in the receiving groove, and the torsion spring is used to drive the guide block 17 to rotate out of the receiving groove, and the guide block 17 is driven by the torsion spring to rotate and maintain Fig. 9 In the state, the slide is rotated counterclockwise (in Figure 8The slider 13 abuts against the inclined guide block 17, and the slider 13 enters the inclined connecting track 16 along the inclined surface of the guide block 17. When the motor 6 drives the slider 13 to rotate clockwise, the slider 13 abuts against the guide block 17, and the slider 13 pushes the guide block 17 to rotate and gradually enters the receiving groove. The guide block 17 will not hinder the sliding of the slider 13, thereby ensuring that the dredging plug 7 always seals the opening at the bottom of the lower hopper 5.

[0036] like Figure 2 , Figure 3 and Fig.10 As shown in the figure, the unloading structure includes a discharge barrel 18, a cross 19, a threaded rod 20 and a sealing plug 21; the discharge barrel 18 is connected to the bottom of the filling chamber, the cross 19 is fixedly installed on the inner wall of the discharge barrel 18, the threaded rod 20 threads through the cross 19, and the sealing plug 21 is fixedly installed on the top of the threaded rod 20. The sealing plug 21 can block the top opening of the discharge barrel 18. The staff can grasp the threaded rod 20 and rotate it, thereby adjusting the sealing plug 21 to rise and fall in the discharge barrel 18, thereby controlling the sealing plug 21 to block the top opening of the discharge barrel 18 to prevent the sample material in the filling chamber from falling out.

[0037] In actual situations, the sample materials are pressed against each other by gravity. However, when testing some sample materials with lower density, it is not convenient for the sample materials to be pressed against each other. The sample materials may also not be able to adhere tightly to the outer wall of the transparent ball 2, which will affect the measurement results.

[0038] like Figure 2 , Figure 3 and Figure 4 As shown in the figure, the spherical box 1 is also equipped with a squeezing mechanism, which is used to squeeze the sample material in the filler chamber and can drive the sample material in the filler chamber to press against each other. The squeezing mechanism includes an annular cover 22 and a soft rubber membrane 23; the annular cover 22 is fixedly installed on the outer periphery of the spherical box 1, and the opening on the spherical box 1 is connected to the annular cover 22. The soft rubber membrane 23 is fixedly installed in the opening, and the soft rubber membrane 23 can block the opening. The annular cover 22 is connected to the air pump, and the squeezing mechanism also includes a support net 24, which is fixedly installed on the support net 24. In the annular cover 22, a support net 24 is installed on one side of the soft rubber membrane 23. Under the gravity of the sample material, the support net 24 supports the soft rubber membrane 23, which reduces the deformation of the soft rubber membrane 23 due to gravity and reduces the shrinkage into the annular cover 22, thereby ensuring that the sample materials are closely fitted to each other and at the same time ensuring that the sample materials are pressed against the outer wall of the transparent ball 2. The air pump works to inflate the annular cover 22, so that the soft rubber membrane 23 expands, and the expanded soft rubber membrane 23 pushes the sample material to press against the outer wall of the transparent ball 2, thereby reducing interference with the test results.

[0039] like Figure 1 , Figure 2 and Figure 3 As shown in , it also includes a spherical housing 25; the spherical box 1 is fixedly mounted in the spherical housing 25, and a support leg is installed at the bottom of the spherical housing 25, and the spherical housing 25 protects other parts of the annular cover 22.

[0040] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A device for measuring reflectivity of an integrating sphere, characterized in that: The invention comprises a spherical box (1), a transparent ball (2) is fixedly installed in the spherical box (1), a gap exists between the inner wall of the spherical box (1) and the outer wall of the transparent ball (2), and the gap between the spherical box (1) and the transparent ball (2) forms a filling chamber, a light inlet tube (3) is installed on the spherical box (1), one end of the light inlet tube (3) abuts against the outer periphery of the transparent ball (2), and a receiving tube (4) is also installed on the spherical box (1), one end of the receiving tube (4) abuts against the outer periphery of the transparent ball (2); A loading mechanism is installed on the top of the spherical box (1), and the loading mechanism is used to load sample materials into the filling chamber, and the sample materials are wrapped around the outer circumference of the transparent ball (2); A discharge structure is installed at the bottom of the spherical box (1), and the discharge structure is used to discharge the sample material in the filling chamber; The loading mechanism comprises a lower hopper (5), a motor (6), a dredging plug (7) and an auxiliary component; the lower hopper (5) is fixedly mounted on the top of the spherical box (1), and the bottom opening of the lower hopper (5) is communicated with the top of the filling chamber, the motor (6) is fixedly mounted on the lower hopper (5), and the auxiliary component is mounted between the output shaft of the motor (6) and the dredging plug (7), and the dredging plug (7) can block the bottom opening of the lower hopper (5); The auxiliary component comprises a rotating column (8), a hexagonal column (9), an ejection spring (10), a rotating rod (11) and an auxiliary frame (12); the rotating column (8) is fixedly connected to the output shaft of the motor (6); the bottom end of the rotating column (8) is provided with a telescopic hole which is slidably matched with the hexagonal column (9); the ejection spring (10) is installed in the telescopic hole; the two ends of the ejection spring (10) are respectively against the top inner wall of the telescopic hole and the top end of the ejection spring (10); the bottom end of the hexagonal column (9) is fixedly connected to the rotating rod (11); the bottom end of the rotating rod (11) is fixedly connected to the top end of the dredging plug (7); the auxiliary frame (12) is fixedly installed on the inner wall of the lower hopper (5); the rotating rod (11) passes through the auxiliary frame (12); the outer periphery of the rotating rod (11) is fixedly connected with a slider (13); the inner wall of the auxiliary frame (12) is provided with a motion slide groove which is slidably matched with the slider (13); When the motor (6) drives the auxiliary frame (12) to rotate clockwise, the slider (13) can move downward on the auxiliary frame (12); when the motor (6) drives the auxiliary frame (12) to rotate counterclockwise, the slider (13) can move upward on the auxiliary frame (12); The motion slide comprises an annular wave track (14), an annular track (15) and an inclined connecting track (16); the annular wave track (14) is a wave-shaped track, the annular wave track (14) is located above the annular track (15), the inclined connecting track (16) is arranged obliquely on the inner wall of the auxiliary frame (12), and the two ends of the inclined connecting track (16) are respectively connected to the annular wave track (14) and the annular track (15); A guide structure is provided at the connection point between the annular track (15) and the inclined connecting track (16); The guide structure comprises a guide block (17) and a torsion spring; a receiving groove is provided on the bottom inner wall of the communication port between the annular track (15) and the inclined communication track (16); one end of the guide block (17) is rotatably mounted in the receiving groove; the torsion spring is sleeved on the rotating shaft of the guide block (17); the guide block (17) can be rotatably received in the receiving groove; and the torsion spring is used to drive the guide block (17) to rotate out of the receiving groove; The unloading structure includes a discharge barrel (18), a cross (19), a threaded rod (20) and a sealing plug (21); the discharge barrel (18) is connected to the bottom of the filling chamber, the cross (19) is fixedly mounted on the inner wall of the discharge barrel (18), the threaded rod (20) threads through the cross (19), the sealing plug (21) is fixedly mounted on the top of the threaded rod (20), and the sealing plug (21) can seal the top opening of the discharge barrel (18).

2. The device for measuring reflectivity of an integrating sphere according to claim 1, characterized in that: The spherical box (1) is also equipped with a squeezing mechanism, which is used to squeeze the sample material in the filling chamber and can drive the sample materials in the filling chamber to press against each other.

3. The device for measuring reflectivity of an integrating sphere according to claim 2, characterized in that: The squeezing mechanism comprises an annular cover (22) and a soft rubber membrane (23); the annular cover (22) is fixedly mounted on the outer periphery of the spherical box (1); an opening on the spherical box (1) is connected to the annular cover (22); the soft rubber membrane (23) is fixedly mounted in the opening and can block the opening; the annular cover (22) is connected to an air pump.

4. The device for measuring reflectivity using an integrating sphere according to claim 3, characterized in that: The extrusion mechanism also includes a support net (24), and the support net (24) is fixedly installed in the annular cover (22).

5. The device for measuring reflectivity using an integrating sphere according to claim 1, characterized in that: It also includes a spherical outer shell (25); the spherical box (1) is fixedly installed in the spherical outer shell (25), and the bottom of the spherical outer shell (25) is installed with supporting legs.

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