Photomultiplier tubes and light detection equipment

Abstract

The present application discloses a photomultiplier tube. The photomultiplier tube is used to detect the optical properties of an object to be detected in a reactor. The photomultiplier tube includes a detection body, a connecting part and a fastener; the detection body is used to detect the optical properties of the object to be detected; the connecting part is provided with a first through hole, the first through hole runs from the first end of the connecting part to the second end of the connecting part, the connecting part includes a glass sheet, the glass sheet is accommodated in the first through hole and separates the first through hole; the first end of the connecting part is embedded in the detection body, the detection body includes a first fastening hole, the first end of the connecting part includes a second fastening hole, and the fastener passes through the first fastening hole and the second fastening hole to fasten the detection body and the connecting part. The connecting part of the photomultiplier tube provided in the present application is detachably connected to the detection body, which is conducive to the subsequent maintenance of the photomultiplier tube. The present application also provides a light detection device including this photomultiplier tube.

Description

Technical Field

[0001] The present application relates to a photodetector, and in particular to a photomultiplier tube and a photodetection device. Background Art

[0002] A photomultiplier tube (PMT) is a light detection device with extremely high sensitivity and ultrafast time response. It can be widely used in instruments and equipment such as photon counting, extremely weak light detection, chemiluminescence, and bioluminescence research.

[0003] The photomultiplier tube is equipped with a lens for receiving and transmitting the light emitted by the object to be tested. However, as the photomultiplier tube is used for a longer time, stains will accumulate on the lens, thus affecting the test results of the photomultiplier tube. The lens is located inside the photomultiplier tube, and the process of cleaning the lens is cumbersome and complicated, which is not conducive to the maintenance of the photomultiplier tube. Summary of the invention

[0004] The present application provides a photomultiplier tube, wherein a connecting portion of the photomultiplier tube is detachably connected to a detection body, so that when the connecting portion needs to be cleaned or replaced, the connecting portion can be removed from the detection body by simply removing a fastener, which is beneficial to subsequent maintenance of the photomultiplier tube.

[0005] The photomultiplier tube is used to detect the optical properties of the object to be tested in the reactor. The photomultiplier tube includes a detection body, a connecting part and a fastener; the detection body is used to detect the optical properties of the object to be tested;

[0006] The connecting portion is provided with a first through hole, the first through hole runs through from the first end of the connecting portion to the second end of the connecting portion, the connecting portion includes a glass sheet, the glass sheet is received in the first through hole and blocks the first through hole;

[0007] The first end of the connecting part is embedded in the detection body, the detection body includes a first fastening hole, the first end of the connecting part includes a second fastening hole, and the fastener passes through the first fastening hole and the second fastening hole to fasten the detection body and the connecting part.

[0008] In one embodiment, the connecting portion includes a first end and a second end, the first end and the second end are two ends of the connecting portion that are arranged opposite to each other, and the first end is an end of the connecting portion that is away from the detection subject;

[0009] The glass sheet is located at the second end and at a side of the fastener close to the interior of the detection body.

[0010] In one embodiment, a first step portion is provided on a side of the second end portion facing the interior of the detection body, the glass sheet is provided on the first step portion, and the first step portion abuts against the detection body.

[0011] In one embodiment, the connecting portion includes a first sealing ring, which is located on a side of the fastener close to the first end, and one side of the first sealing ring abuts against the detection body, and the other side of the first sealing ring abuts against the connecting portion.

[0012] In one embodiment, the connecting portion further includes a middle portion, the middle portion is connected between the first end portion and the second end portion, and the middle portion and the first end portion are jointly arranged to form a second through hole;

[0013] The photomultiplier tube further includes an injection needle extending from the second through hole to the interior of the connecting portion.

[0014] In one embodiment, a second step portion is provided on a side of the first end portion toward the middle portion, a third step portion is provided on a side of the middle portion toward the first end portion, and the injection needle is provided with a protrusion, which contacts the second step portion and the third step portion.

[0015] In one embodiment, the second end portion and the middle portion are integrally formed, and the first end portion and the middle portion are bonded together.

[0016] In one embodiment, the fastener is provided with threads, and the fastener is connected to the first fastening hole through threads.

[0017] In one embodiment, the fastener includes a handle portion and a fixing portion connected to the handle portion, the fixing portion is received in the first fastening hole, the handle portion is exposed relative to the first fastening hole, and the fixing portion is gap-matched with a hole wall of the first fastening hole.

[0018] On the other hand, the present application further provides a light detection device, which includes a housing and the photomultiplier tube as described above, wherein the photomultiplier tube is installed in the housing.

[0019] In the embodiment of the present application, the connection part is used to connect the reactor, and the connection part is provided with a first through hole for receiving the light emitted by the object to be tested, so that the optical properties of the object to be tested in the reactor are transmitted to the inside of the detection body through the connection part. The connection part is detachably connected to the detection body, so that when the connection part needs to be cleaned or replaced, the connection part can be removed from the detection body by simply removing the fastener, which is beneficial to the subsequent maintenance of the photomultiplier tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solution of the present application, the drawings required for use in the implementation manner will be briefly introduced below. Obviously, the drawings described below are only some implementation manners of the present application. For ordinary technicians in this field, other drawings can be obtained like these drawings without paying any creative work.

[0021] Figure 1 It is the light detection device provided by the present application;

[0022] Figure 2 yes Figure 1 The photomultiplier tube shown is a schematic structural diagram of the first embodiment;

[0023] Figure 3 The reactor is installed in Figure 2 The schematic diagram of the structure of the photomultiplier tube shown;

[0024] Figure 4 yes Figure 2 Schematic diagram of the exploded structure of the photomultiplier tube shown;

[0025] Figure 5 yes Figure 3 A schematic cross-sectional view of the structure shown;

[0026] Figure 6 yes Figure 5 A schematic diagram of a portion of the structure shown;

[0027] Figure 7 yes Figure 1 The photomultiplier tube is a schematic structural diagram of the second embodiment;

[0028] Figure 8 yes Figure 7 Schematic cross-section of the structure shown. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0030] Please also read Figure 1 and Figure 2 , Figure 1 It is the light detection device provided by the present application; Figure 2 yes Figure 1The photomultiplier tube is a schematic diagram of the structure of the first embodiment. The present application provides a light detection device. The light detection device 100 includes a photomultiplier tube 10 and a housing 20. The photomultiplier tube 10 is installed in the housing 20. The photomultiplier tube 10 is used to detect the optical properties of the object to be detected in the reactor. That is, the light detection device 100 is used to detect the optical properties of the object to be detected.

[0031] The optical detection device 100 can be applied to in vitro diagnosis and can also be applied to other fields. For example, the optical detection device 100 can also be applied to scientific research experiments to detect the optical properties of the object to be tested. In the embodiments provided in the present application, the optical detection device 100 is described as being applied to in vitro diagnosis. During the in vitro diagnosis process, the optical detection device 100 can automatically analyze and detect specific analysis objects in the object to be tested.

[0032] Please continue reading Figure 2 and Figure 3 , Figure 3 The reactor is installed in Figure 2 The schematic diagram of the structure of the photomultiplier tube 10 is shown. The photomultiplier tube 10 includes a detection body 11, a connecting portion 12 and a fastener 13. The detection body 11 is used to detect the optical properties of the object to be detected. The connecting portion 12 is detachably connected to the detection body 11. Among them, the connecting portion 12 is connected to the detection body 11 through a fastener 13. The connecting portion 12 is detachably connected to the reactor 30, so that when a problem occurs with the connecting portion 12, the connecting portion 12 can be replaced in time, which is beneficial to the subsequent maintenance of the photomultiplier tube 10 and avoids the entire photomultiplier tube 10 being discarded due to a problem with the connecting portion 12.

[0033] The reactor 30 can be installed on the connecting portion 12, and the reactor 30 can also be used separately from the connecting portion 12. That is, the reactor 30 can be installed and used together with the photomultiplier tube 10, and the reactor 30 can also be separated from the photomultiplier tube 10. The reactor 30 is used to place the object to be tested. The reactor 30 can be a reaction cup or a reaction box. In the present application, there is no restriction on the type of the reactor 30. In the embodiment of the present application, the reactor 30 is described as a reaction cup as an example.

[0034] like Figure 2 As shown, the light detection device 100 is in a state where the reactor 30 is not installed on the connecting portion 12. For example, when the reactor 30 obtains the object to be detected, the photomultiplier tube 10 is used separately from the reactor 30. Alternatively, after the photomultiplier tube 10 detects the object to be detected in the reactor 30, the photomultiplier tube 10 is separated from the reactor 30.

[0035] like Figure 3As shown, in another use state of the light detection device 100, the reactor 30 is installed on the connecting portion 12, so that the photomultiplier tube 10 is used together with the reactor 30. For example, when the photomultiplier tube 10 detects the object to be detected in the reactor 30, the reactor 30 is installed on the photomultiplier tube 10, so that the photomultiplier tube 10 can detect the object to be detected in the reactor 30.

[0036] Please also read Figure 4 and Figure 5 , Figure 4 yes Figure 2 The exploded structure diagram of the photomultiplier tube 10 is shown in FIG. Figure 5 yes Figure 3 A cross-sectional schematic diagram of the structure shown. The connecting portion 12 is provided with a first through hole 122. The first through hole 122 runs from the first end of the connecting portion 12 to the second end of the connecting portion 12. The first through hole 122 is used to transmit the light emitted by the object to be tested to the inside of the detection body 11, so that the detection body 11 can detect the optical properties of the object to be tested.

[0037] The connecting portion 12 includes a glass sheet 126. The glass sheet 126 is received in the first through hole 122 and blocks the first through hole 122. It can be understood that the glass sheet 126 isolates the external environment from the interior of the detection body 11. The glass sheet 126 can isolate the object to be detected from the detection body 11, thereby preventing the object to be detected from contaminating the interior of the detection body 11, thereby ensuring the reliability of the detection data.

[0038] The first end of the connecting portion 12 is embedded in the detection body 11. The detection body 11 includes a first fastening hole 111. The connecting portion 12 includes a second fastening hole 121. The fastener 13 passes through the first fastening hole 111 and the second fastening hole 121 to fasten the detection body 11 and the connecting portion 12. The second fastening hole 121 is accommodated in the detection body 11. It can be understood that a part of the connecting portion 12 is accommodated in the detection body 11, and another part of the connecting portion 12 is exposed relative to the detection body 11. Among them, the connecting portion 12 accommodated in the detection body 11 is used to connect with the detection body 11. The connecting portion 12 exposed relative to the detection body 11 is used to connect with the reactor 30.

[0039] Among them, Figure 5 As shown, the first fastening hole 111 passes through the side wall of the detection body 11. The second fastening hole 121 is a groove on the side wall of the connecting portion 12. That is, the second fastening hole 121 does not pass through the side wall of the connecting portion 12. The second fastening hole 121 does not pass through the side wall of the connecting portion 12, thereby preventing external light from entering the interior of the photomultiplier tube 10 through the second fastening hole 121 and affecting the test results.

[0040] In the embodiment of the present application, the connection part 12 is used to connect the reactor 30, and the connection part 12 is provided with a first through hole 122 for receiving the light emitted by the object to be tested, so that the optical properties of the object to be tested in the reactor 30 are transmitted to the inside of the detection body 11 through the connection part 12. The connection part 12 is detachably connected to the detection body 11, so that when the connection part 12 needs to be cleaned or replaced, the connection part 12 can be removed from the detection body 11 by simply removing the fastener 13, which is beneficial to the subsequent maintenance of the photomultiplier tube 10. For example, when the glass sheet 126 of the photomultiplier tube 10 accumulates stains after long-term use and needs to be cleaned, the user only needs to remove the fastener 13 to remove the glass sheet 126 from the photomultiplier tube 10, which is convenient for cleaning the glass sheet 126 and beneficial to the subsequent maintenance of the photomultiplier tube 10.

[0041] In one embodiment, the number of the fastener 13 is one. It can be understood that the number of the first fastening hole 111 and the second fastening hole 121 is one. In other embodiments, the number of the fastener 13 can also be two or more.

[0042] In the embodiment of the present application, the connection part 12 can be firmly connected to the detection body 11 by a fastener 13. When the connection part 12 needs to be disassembled, the user only needs to remove the fastener 13 to separate the connection part 12 from the detection body 11, which facilitates the disassembly of the connection part 12 and improves the efficiency of the maintenance of the connection part 12.

[0043] Further, the fastener 13 is provided with a thread 131. The fastener 13 is connected to the first fastening hole 111 through the thread 131. It can be understood that the first fastening hole 111 is also provided with a thread 131, so that the fastener 13 and the first fastening hole 111 are matched by a thread. That is, the connecting portion 12 and the detection body 11 are fastened by threads.

[0044] In the embodiment of the present application, the fastener 13 is provided with a thread 131, and the fastener 13 cooperates with the first fastening hole 111 and the second fastening hole 121 by means of threads, so that the connecting part 12 can be firmly fixed to the detection body 11, thereby avoiding the situation where the connecting part 12 is not tightly connected to the detection body 11 and falls off from the detection body 11, thereby ensuring the quality of the photomultiplier tube 10.

[0045] Furthermore, the connecting portion 12 includes a first sealing ring 123 . The first sealing ring 123 is located on one side of the fastener 13 close to the first end 124 , and one side of the first sealing ring 123 abuts against the detection body 11 . The other side of the first sealing ring 123 abuts against the connecting portion 12 .

[0046] In the embodiment of the present application, the first sealing ring 123 is located in the area where the connecting part 12 contacts the detection body 11, ensuring the optical seal between the connecting part 12 and the detection body 11, and preventing external light from entering the detection body 11 from the contact point between the detection body 11 and the connecting part 12 to interfere with the test.

[0047] Please continue to read Figure 3 and Figure 5 The connecting portion 12 includes a first end portion 124 and a second end portion 125. The first end portion 124 and the second end portion 125 are two ends of the connecting portion 12 that are arranged opposite to each other. The first through hole 122 passes through the second end portion 125 from the first end portion 124. The first end portion 124 is an end of the connecting portion 12 that is away from the detection body 11. The glass sheet 126 is located at the second end portion 125 and is located at a side of the fastener 13 that is close to the inside of the detection body 11.

[0048] It can be understood that the first end portion 124 is used to connect to the reactor 30. When the reactor 30 is installed on the connecting portion 12, part or all of the first end portion 124 is accommodated in the reactor 30 or part of the reactor 30 is accommodated in the first end portion 124. In the embodiment of the present application, when the reactor 30 is installed on the connecting portion 12, the entire first end portion 124 is accommodated in the reactor 30 as an example for description. In other embodiments, the entire first end portion 124 can also be accommodated in the reactor 30.

[0049] Among them, the second end 125 is an end of the connection part 12 close to the detection body 11. That is, the second end 125 is used to connect with the detection body 11. The first end of the connection part 12 is embedded in the detection body 11. That is, the first end of the connection part 12 is located at the second end 125, and the second end of the connection part 12 is located at the first end 124. It can be understood that the glass piece 126 is located at the second end 125 and is located on the side of the fastener 13 close to the inside of the detection body 11, so that the glass piece 126 blocks the opening of the first through hole 122 at the second end 125.

[0050] In the embodiment of the present application, the glass sheet 126 is located at the second end 125 and at the side of the fastener 13 close to the inside of the detection body 11, so that the glass sheet 126 is located at the end of the connecting portion 12 away from the reactor 30, thereby increasing the distance between the object to be tested and the glass sheet 126, and increasing the difficulty of the object to be tested in the reactor 30 to contaminate the glass sheet 126, thereby saving the number of times the photomultiplier tube 10 needs to be repaired.

[0051] Please continue reading Figure 5 A first step portion 1251 is disposed on a side of the second end portion 125 facing the inside of the detection body 11 . The glass sheet 126 is disposed on the first step portion 1251 . The first step portion 1251 abuts against the detection body 11 .

[0052] In the embodiment of the present application, the first step portion 1251 is used to support the glass sheet 126, and the first step portion 1251 abuts against the detection body 11, so that the detection body 11 is in close contact with the first step portion 1251, thereby avoiding light leakage from the first step portion 1251 relative to the detection body 11, so that the light emitted by the object to be tested can be fully irradiated on the glass sheet 126, thereby ensuring the reliability of the detection data.

[0053] Please continue to read Figure 5 and Figure 6 , Figure 6 yes Figure 5 Schematic diagram of a partial structure of the structure shown. The connecting portion 12 also includes an intermediate portion 127. The intermediate portion 127 is connected between the first end portion 124 and the second end portion 125. The intermediate portion 127 and the first end portion 124 are together arranged to form a second through hole 128. It can be understood that the second through hole 128 is located between the glass sheet 126 and the first end portion 124. The photomultiplier tube 10 also includes an injection needle 14. The injection needle 14 extends from the second through hole 128 to the interior of the connecting portion 12.

[0054] The middle portion 127 is integrally formed with the second end portion 125. The first end portion 124 is bonded to the middle portion 127. It can be understood that the first end portion 124 and the middle portion 127 and the first end portion 124 are two components spaced apart.

[0055] In the embodiment of the present application, the middle portion 127 and the second end portion 125 are integrally formed, which simplifies the manufacturing process of the connecting portion 12 and helps to ensure the optical sealing of the connecting portion 12. The middle portion 127 and the first end portion 124 are two separate parts, so that the injection needle 14 can extend from the second through hole 128 to the inside of the connecting portion 12.

[0056] In one embodiment, the first end portion 124 is connected to the middle portion 127 by an adhesive layer. For example, the first end portion 124 is bonded to the middle portion 127 by black glue. The black glue can prevent external light from interfering with the test results of the photomultiplier tube 10, thereby improving the reliability of the test data.

[0057] The injection needle 14 extends from the second through hole 128 to the inside of the connecting portion 12 , so that when the reactor 30 is installed on the connecting portion 12 , one end of the injection needle 14 is located inside the reactor 30 , so that the liquid in the injection needle 14 flows into the reactor 30 .

[0058] like Figure 5 As shown, when the reactor 30 is installed on the photomultiplier tube 10, one end of the injection needle 14 is located inside the reactor 30. The injection needle 14 is located between the glass sheet 126 and the first end 124, and one end of the injection needle 14 is located inside the reactor 30, so that the liquid in the injection needle 14 flows into the reactor 30.

[0059] In the embodiment of the present application, the photomultiplier tube 10 needs to inject the target liquid into the object to be tested before testing the object to be tested, so that the object to be tested reacts with the target liquid, and then detects the liquid in the reactor 30. The object to be tested in the reactor 30 needs to be triggered by the target liquid to display the optical properties of the object to be tested, that is, when the target liquid is added to the object to be tested, the photomultiplier tube 10 detects the liquid in the reactor 30 to obtain detection data.

[0060] Further, the injection needle 14 includes a first portion 141 and a second portion 142. The first portion 141 extends along a first direction. The second portion 142 extends along a second direction. The first direction is different from the second direction. The second portion 142 is located inside the connecting portion 12. The second direction is the direction from the second end portion 125 toward the first end portion 124.

[0061] In the embodiment of the present application, the injection needle 14 includes a first portion 141 and a second portion extending in different directions. It can be understood that the second portion 142 is bent relative to the first portion 141, and the bending direction is the direction from the second end 125 to the first end 124, so that the second portion 142 includes a vertical downward portion, which is conducive to the target liquid in the injection needle 14 dripping vertically into the reactor 30, ensuring that the target liquid reacts with the object to be detected, and improving the reliability of the detection data.

[0062] Further, the first end portion 124 is provided with a second step portion 1241 on one side facing the middle portion 127. The middle portion 127 is provided with a third step portion 1271 on one side facing the first end portion 124. The injection needle 14 is provided with a protrusion 143. The protrusion 143 contacts the second step portion 1241 and the third step portion 1271.

[0063] In the embodiment of the present application, the raised portion 143 on the injection needle 14 contacts the second step portion 1241 and the third step portion 1271, which can not only position the injection needle 14, but also enable the middle portion 127 or the first end portion 124 to cooperate with the injection needle 14 in a maze shape, thereby achieving a shading effect.

[0064] The second step portion 1241 cooperates with the third step portion 1271 to connect the first end portion 124 with the middle portion 127. The photomultiplier tube 10 is provided with an injection needle 14, and the injection needle 14 needs to extend into the interior of the connecting portion 12, so that the connecting portion 12 includes a separated middle portion 127 and a first end portion 124. At this time, the middle portion 127 and the first end portion 124 are connected in a stepped manner, which can achieve a light shielding effect, prevent external light from interfering with the test, and improve the reliability of the photomultiplier tube 10.

[0065] In one embodiment, the middle portion 127 is connected to the first end portion 124 by black glue. The black glue not only makes the middle portion 127 and the first end portion 124 tightly connected, but also has a light shielding effect to prevent external light from interfering with the test and improve the reliability of the photomultiplier tube 10.

[0066] Furthermore, the photomultiplier tube 10 further includes a second sealing ring 130. The second sealing ring 130 is disposed around the periphery of the fastener 13. One side of the second sealing ring 130 abuts against the fastener 13, and the other side of the second sealing ring abuts against the detection body 11.

[0067] In the embodiment of the present application, a second sealing ring 130 is provided around the periphery of the fastener 13, and the second sealing ring 130 is used to prevent looseness, so that the connecting portion 12 is firmly connected to the detection body 11. The second sealing ring 130 can also ensure the optical seal between the fastener 13 and the connecting portion 12, and prevent external light from entering the detection body 11 through the first fastening hole 111 to interfere with the test.

[0068] Please continue to read Figure 7 and Figure 8 , Figure 7 yes Figure 1 The photomultiplier tube 10 is a schematic structural diagram of the second embodiment; Figure 8 yes Figure 7 Most of the technical solutions in this embodiment that are the same as those in the first embodiment will not be described in detail.

[0069] The fastener 13 includes a handle portion 132 and a fixing portion 133 connected to the handle portion 132. The fixing portion 133 is received in the first fastening hole 111. The handle portion 132 is exposed relative to the first fastening hole 111, and the fixing portion 133 is gap-matched with the hole wall of the first fastening hole 111.

[0070] In the embodiment of the present application, the fixing portion 133 and the first fastening hole 111 are matched through clearance, so that the fastener 13 passes through the first fastening hole 111 and the second fastening hole 121 to fasten the detection body 11 and the connecting portion 12. The user can hold the handle 132 and pull the fixing portion 133 out of the first fastening hole 111 to the outside of the detection body 11.

[0071] It can be understood that in the embodiment of the present application, the fastener 13 does not require the use of tools, and the fixing portion 133 can be pulled out of the outside of the detection body 11 by the user's hands, which facilitates the disassembly of the connecting portion 12 and saves the time for disassembling the connecting portion 12.

[0072] In one embodiment, the fixing portion 133 includes a first fixing portion 1331 and a second fixing portion 1332. The first fixing portion 1331 is located between the handle portion 132 and the second fixing portion 1332, and the first fixing portion 1331 protrudes from the outer surface of the second fixing portion 1332 toward the outside of the fixing portion 133. The first fixing portion 1331 is received in the first fastening hole 111, and the second fixing portion 1332 is received in the second fastening hole 121. It can be understood that the aperture of the first fastening hole 111 is larger than the aperture of the second fastening hole 121.

[0073] In the embodiment of the present application, the fixing portion 133 is provided with a protrusion, so that the place where the detection body 11 and the connecting portion 12 are connected forms a maze shape, thereby preventing external light from entering the interior of the detection body 11 and improving the reliability of the photomultiplier tube 10.

[0074] The above is a detailed introduction to the implementation methods of the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above implementation methods is only used to help understand the method and core idea of ​​the present application. At the same time, for general technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A photomultiplier tube, characterized in that: It includes a detection body, a connecting part and a fastener; the detection body is used to detect the optical properties of the object to be tested; The connecting portion is provided with a first through hole, the first through hole runs through from the first end of the connecting portion to the second end of the connecting portion, the connecting portion includes a glass sheet, the glass sheet is received in the first through hole and blocks the first through hole; The first end of the connecting portion is embedded in the detection body, the detection body includes a first fastening hole, the first end of the connecting portion includes a second fastening hole, and the fastener passes through the first fastening hole and the second fastening hole to fasten the detection body and the connecting portion; The connecting portion is used to install a reactor, and the reactor is used to place the object to be tested.

2. The photomultiplier tube according to claim 1, characterized in that The connecting portion includes a first end and a second end, the first end and the second end are two ends of the connecting portion that are arranged opposite to each other, and the first end is an end of the connecting portion that is away from the detection body; The glass sheet is located at the second end and at a side of the fastener close to the interior of the detection body.

3. The photomultiplier tube according to claim 2, characterized in that: A first step portion is provided on a side of the second end portion facing the interior of the detection body, the glass sheet is arranged on the first step portion, and the first step portion abuts against the detection body.

4. The photomultiplier tube according to claim 2, characterized in that: The connecting portion includes a first sealing ring, which is located on a side of the fastener close to the first end, and one side of the first sealing ring abuts against the detection body, and the other side of the first sealing ring abuts against the connecting portion.

5. The photomultiplier tube according to claim 2, characterized in that: The connecting portion further includes a middle portion, the middle portion is connected between the first end portion and the second end portion, and the middle portion and the first end portion are jointly arranged to form a second through hole; The photomultiplier tube further includes an injection needle extending from the second through hole to the interior of the connecting portion.

6. The photomultiplier tube according to claim 5, characterized in that: A second step portion is provided on a side of the first end portion toward the middle portion, a third step portion is provided on a side of the middle portion toward the first end portion, and the injection needle is provided with a protrusion, which contacts the second step portion and the third step portion.

7. The photomultiplier tube according to claim 5, characterized in that: The second end portion is integrally formed with the middle portion, and the first end portion is bonded to the middle portion.

8. The photomultiplier tube according to any one of claims 1 to 7, characterized in that: The fastener is provided with threads, and the fastener is connected to the first fastening hole through threads.

9. The photomultiplier tube according to any one of claims 1 to 7, characterized in that: The fastener includes a handle portion and a fixing portion connected to the handle portion, the fixing portion is received in the first fastening hole, the handle portion is exposed relative to the first fastening hole, and the fixing portion is gap-matched with a hole wall of the first fastening hole.

10. A light detection device, characterized in that: The invention comprises a housing and a photomultiplier tube according to any one of claims 1 to 9, wherein the photomultiplier tube is installed in the housing.

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