Small-halo vacuum photoelectric device and application thereof
By adopting a specific ring structure and inner protrusion design in a small halo vacuum photoelectric device, the vibration noise and creepage problems of the electron multiplier plate are solved, and the reliability and scope of use of the device are enhanced.
Patent Information
- Application Number
- CN202510932096.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-07
- Publication Date
- 2025-10-10
Smart Images
Figure CN120767181A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of photon detection technology, and in particular to a small halo vacuum photoelectric device and its application. Background Art
[0002] The existing small halo vacuum optoelectronic device structure has the following problems: when a pulse voltage is supplied to the cathode of the small halo vacuum optoelectronic device, the electron multiplier plate vibrates, causing it to generate acoustic noise, which makes the vacuum optoelectronic device easily expose its position, limiting the scope of use of the small halo vacuum optoelectronic device, such as night reconnaissance.
[0003] During the assembly process, small-halo vacuum photoelectric devices often absorb metallic or organic impurities, degrading their dielectric properties. However, a high voltage of at least 4kV exists between the electron multiplier plate output surface and the output window. This can lead to creepage or electric shock on the ceramic inner surface between the electron multiplier plate output surface and the output window. However, due to the size limitations of small-halo vacuum photoelectric devices, the cylindrical ceramic structure cannot be infinitely increased in height to resolve creepage or electric shock, nor can the inner surface of the small-halo vacuum photoelectric device be repaired by breaking the vacuum. This reduces the reliability of small-halo vacuum photoelectric devices.
[0004] The information disclosed in the background section is only intended to enhance understanding of the overall background of the invention and should not be considered as an admission or any form of suggestion that the information constitutes the prior art already known to a person of ordinary skill in the art. Summary of the Invention
[0005] In response to the above technical problems, the present application provides a small halo vacuum photoelectric device, which is used to solve the technical problems of fixing the electron multiplier plate and reducing the deformation of the electron multiplier plate in the small halo vacuum photoelectric device, so as to expand the application range of the device and enhance its reliability.
[0006] The present application provides a small halo vacuum photoelectric device, comprising: a first ceramic ring, a second ceramic ring, a first metal ring, a second metal ring, an elastic pressure ring, and an electron multiplying plate having a conductive input surface and a conductive output surface;
[0007] A first ceramic ring is arranged on the bottom surface of the first metal ring; and a second metal ring is arranged on the bottom surface of the first ceramic ring.
[0008] The second metal ring is arranged on the top surface of the second ceramic ring; an anode is arranged on the bottom surface of the second ceramic ring; the second metal ring comprises: a raised annular element, a metallized first surface, a metallized second surface and a metallized third surface; the second surface is in electrical contact with an external power supply component;
[0009] The conductive output surface of the electron multiplier plate is electrically connected to the third surface, and radial displacement is limited by a raised annular element; the raised height of the raised annular element is no greater than one-third of the thickness of the electron multiplier plate;
[0010] The first contact surface of the elastic pressure ring is an outer cone structure, the vertex of the first contact surface is located on the vertical axis of the elastic pressure ring, and the bevel of the first contact surface is When the angle is 89° to 86°, the metallized surface of the elastic pressure ring is completely adhered to the conductive input surface of the electron multiplier plate.
[0011] Preferably, an inwardly protruding annular element is provided on the inner side wall of the lower portion of the ceramic ring.
[0012] Preferably, the diameter of the inwardly protruding ring of the second ceramic ring is not larger than the diameter of the working surface of the electron multiplier plate, and the height of the inwardly protruding boss is one third of the total height of the ceramic tube.
[0013] Preferably, an inclined surface is provided on the inner side wall of the elastic pressure ring; the contact surface between the first metal ring and the inclined surface is electrically conductive; the metallized surface of the elastic pressure ring is electrically conductive with the conductive input surface of the electron multiplier plate 5;.
[0014] Preferably, the outer diameter of the elastic pressure ring is larger than the minimum inner diameter of the first metal ring;
[0015] Circular holes or semicircular holes are provided near the slits on both sides of the elastic pressure ring;
[0016] The first metal ring and the second metal ring are dielectric rings made of metal material and have a metal coating.
[0017] Preferably, the first metal ring is in the shape of a flat ring; the inclined surface of the elastic pressure ring is a metallized surface, which is used to form a linear contact with the second metallized surface of the first metal ring;
[0018] Preferably, the shape of the third surface of the metal ring is flat;
[0019] Preferably, the metallized third surface and the annular raised surface are in the shape of a circular ring.
[0020] Preferably, after assembly, the circular protrusion on the inner edge surface of the annular protruding surface contacts the side surface of the electron multiplier plate;
[0021] Preferably, the elastic pressure ring, the first metal ring and the second metal ring are made of an alloy material of nickel, cobalt and iron.
[0022] Preferably, the conductive material of the conductive input surface and the conductive output surface of the electron multiplier plate is nickel-chromium alloy.
[0023] Another aspect of the present application provides a low-illumination imaging device, comprising: the above-mentioned small halo vacuum photoelectric device.
[0024] The beneficial effects of this application include:
[0025] 1) The small halo vacuum photoelectric device provided in this application solves the problem of power interruption or loss of electron multiplier plate supply due to partial or complete lack of electrical contact between the conductive input surface of the electron multiplier plate and the metallized surface of the elastic pressure ring. It also addresses the problems of electric shock and creepage between the second metal ring and the anode, eliminates the halo phenomenon caused by stray light generated by surface deformation of the electron multiplier plate, and reduces the sound generated by electron multiplier plate oscillation. Furthermore, no reliability degradation has been observed in the small halo vacuum photoelectric device prepared by the above method.
[0026] 2) The small halo vacuum photoelectric device provided in the present application has a greatly reduced oscillation amplitude of the electron multiplier plate in the small halo vacuum photoelectric device when an AC voltage is supplied to the cathode of the device, thereby reducing the sound generated by the vibration of the electron multiplier plate, thereby avoiding exposing the user's position to the noise generated when the device operates under AC voltage conditions.
[0027] 3) The small halo vacuum photoelectric device provided in this application is provided by setting an angle from 89° to 86° on the elastic pressure ring of the structural device. Planar contact between the elastic pressure ring and the conductive input surface of the electron multiplier plate is achieved, eliminating partial or complete electrical contact between the elastic pressure ring and the electron multiplier plate and related surfaces, and eliminating the halo phenomenon caused by stray light generated by surface deformation of the electron multiplier plate.
[0028] 4) The small halo vacuum photoelectric device provided in the present application increases the electrical isolation distance between the output surface of the electron multiplier plate and the anode by setting an internal protrusion structure in the second ceramic ring of the device, thereby solving the problem of internal surface creepage and electrode, and completely eliminating creepage during use. BRIEF DESCRIPTION OF THE DRAWINGS
[0029] Figure 1 This is a small halo vacuum photoelectric device in this application.
[0030] Figure 2 This is a cross-sectional view of the elastic pressure ring in this application. DETAILED DESCRIPTION
[0031] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.
[0032] The following detailed description of the embodiments of the application provided in the accompanying drawings is not intended to limit the scope of the application claimed, but merely represents selected embodiments of the application. Based upon the embodiments of the application, all other embodiments obtained by those of ordinary skill in the art without having to make creative efforts are within the scope of the application.
[0033] The technical means not described in detail in the present application and not used to solve the technical problems of the present application are set according to the common knowledge in the art, and various common knowledge setting methods can be implemented.
[0034] Referring to Figures 1-2 The small halo vacuum photoelectric device provided by the present application comprises: an electron multiplication plate 5 having a conductive input surface and a conductive output surface, a first ceramic ring 6, a second ceramic ring 7, a first metal ring 1, and a second metal ring 3. The first metal ring 1 is arranged on the top surface of the first ceramic ring 6. The second metal ring 3 is arranged on the bottom surface of the first ceramic ring 6. The second ceramic ring 7 is arranged on the bottom surface of the second metal ring 3. The inner side wall of the elastic compression ring 2 is provided with an inclined surface 21, which is in contact with the inner wall of the first metal ring 1. The elastic compression ring 2 has a circular hole or a semicircular hole near the slits on both sides.
[0035] In the small halo vacuum photoelectric device, the second ceramic ring 7 is installed between the second metal ring 3 and the anode, and protrudes into the small halo vacuum photoelectric device, increasing the electrical isolation distance between the output surface 52 of the electron multiplication plate and the anode, solving the problem of internal surface creep and electrode.
[0036] The second metal ring 3 comprises: a metal support ring and a protruding annular element. The metal support ring comprises: a first metalized surface 31, a second metalized surface 32, and a third metalized surface 33.
[0037] The electron multiplication plate 5 is retained on the third surface 33 in the small halo vacuum photoelectric device, the metalized surface 33 of the metal support ring is in contact with the conductive output surface 52 of the electron multiplication plate 5, and the second surface 32 of the metal support ring is in electrical contact with the external power supply part of the small halo vacuum photoelectric device. The protruding annular element is to prevent displacement of the electron multiplication plate 5 in its plane, and the protrusion height is not greater than one-third of the thickness of the electron multiplication plate 5.
[0038] The elastic compression ring 2 comprises: a first metalized contact surface 22, a first metalized inclined surface 21, and a second metalized inclined surface 23. The first metal ring 1 is in electrical linear contact with the first metalized inclined surface 21 of the elastic compression ring 2. The first metal ring 1 comprises: a first metalized surface 12 and a second metalized surface 11, and the first metal ring 1 is in electrical contact with the outside of the small halo vacuum photoelectric device.
[0039] The first contact surface 22 of the elastic pressure ring 2 is made into an outer cone, the vertex of which is located on the vertical axis of the elastic pressure ring 2, and the bevel The ceramic ring 7 is installed between the metal ring 3 and the anode. The inner wall of the ceramic ring 7 is provided with an annular element protruding into the vacuum chamber. The protruding annular element can increase the electrical isolation distance between the output surface of the electron multiplier plate and the anode.
[0040] Based on the given parameters and the overall dimensions of the vacuum photoelectric device, the diameter of the electron multiplier plate 5, the diameter of its conductive input surface 51 and the diameter of its conductive output surface 52, the overall dimensions of the small halo vacuum photoelectric device and the position of the electron multiplier plate 5 in the small halo vacuum photoelectric device relative to other electrodes also located in the small halo vacuum photoelectric device, the geometric dimensions are determined and the shape of the element used to mount the electron multiplier plate 5 in the small halo vacuum photoelectric device is selected, depending on the material selected for its manufacture and the contact conditions of the surface of the said element of the manufacturing unit for retaining and axially fixing the electron multiplier plate 5 in the small halo vacuum photoelectric device, as well as the conditions for leaving the metallized surface 12 of the first metal ring 1 outside the small halo vacuum photoelectric device to provide electrical contact.
[0041] The metallized surface 12 of the first metal ring 1 is electrically connected to the metallized inclined surface 21 of the elastic pressure ring, and the metallized surface 22 of the elastic pressure ring is electrically connected to the conductive input surface 51 of the electron multiplier plate 5 .
[0042] The elastic pressure ring 2 features a beveled metalized surface 21, ensuring linear electrical contact with the first metal ring 1. This is determined by the minimum inner diameter of the first metal ring 1, the outer diameter of the elastic pressure ring 2, and its height. To ensure adequate pressure on the electron multiplier plate 5 and secure it axially within the small halo vacuum photoelectric device, the outer diameter of the elastic pressure ring 2 is larger than the minimum inner diameter of the first metal ring 1. The height of the elastic pressure ring 2, the width of the conductive input surface 51 of the electron multiplier plate 5, and the bevel angle of the elastic pressure ring 2 are determined based on the contact between the elastic pressure ring 2 and the conductive input surface of the electron multiplier plate 5. The elastic pressure ring 2, first metal ring 1, and second metal ring 3 are made of a nickel, cobalt, and iron alloy.
[0043] Therefore, the first metal ring 1 is shaped as a flat ring, i.e., has a low profile height cross section and no beveled metallized surface, while the beveled surface 21 of the elastic pressure ring 2 is a metallized surface, which is used to form a linear contact with the second metallized surface 11 of the first metal ring 1. The metal ring third surface 33 is shaped as a flat ring, and the first surface 31 is the annular raised surface of the second metal ring 3.
[0044] The geometric dimensions of the second metal ring 3 are determined based on the conductive output surface of the electron multiplier plate. The metallized third surface 33 is in the shape of a circular ring, and the annular raised surface 31 is in the shape of a circular ring, so that they provide a concentric arrangement relative to the electron multiplier plate 5. In this arrangement, the circular protrusion on the inner edge surface of the annular raised surface 31 contacts the side surface of the electron multiplier plate 5.
[0045] The first and second ceramic rings 6 and 7 of the small halo vacuum photoelectric device are made of ceramic. The first ceramic ring 6 is cylindrical, and the diameter of the inwardly protruding ring of the second ceramic ring 7 is no larger than the diameter of the working surface of the electron multiplier plate 5. The height of the protrusion is preferably one-third of the total height of the ceramic cylinder 7. The conductive material of the conductive input surface 51 and output surface 53 of the electron multiplier plate 5 is nickel-chromium alloy. The elastic pressure ring 2 is forged and has a beveled metallized surface 21. The bevel angle of the metallized surface 22 is determined by experiments. When the angle is from 89° to 86°, the metallized surface 22 of the elastic pressure ring 2 can be completely adhered to the conductive input surface 51 of the electron multiplier plate 5 .
[0046] Known methods for manufacturing a small halo vacuum photoelectric device are described, based on its given geometric dimensions, selected materials, and external shape. The conductive input surface 51 and output surface 52 of the electron multiplier plate 5 are formed by metal spraying along the periphery of the electron multiplier plate 5 from both sides. The elastic pressure ring 2 is made of a solid rod, for example, with a circular cross-section, and is cut on a lathe to achieve the specific surface profile of the elastic pressure ring 2. The elastic pressure ring 2 is cut open, and cuts are made on both sides near the cut to facilitate the insertion of a tool, such as pliers or tweezers, to facilitate installation of the elastic pressure ring 2 within the small halo vacuum photoelectric device.
[0047] The raised first surface 31 of the second metal ring 3 is manufactured by turning or stamping. The small halo vacuum photoelectric device is manufactured using a known hot-press welding method. The annular components that comprise the small halo vacuum photoelectric device are sequentially connected along its axial direction. These include the electron multiplier plate 5 secured within the device, as well as the annular components included in its assembly: the first metal ring 1 and the second metal ring 3, as well as the raised ring 31 and support ring 33 of the second metal ring 3.
[0048] The dielectric ring element of the obtained small halo vacuum photoelectric device is placed between the conductive input surface 51 of the electron multiplier plate 5 and the second metal ring 3, so that the elastic pressure ring 2 and the second metal ring 3 are isolated from each other.
[0049] The spring pressure ring 2 and the metallized surface of the electron multiplier plate 5 are in conjugate contact throughout their entire area. In the small-halo vacuum photoelectric device, the axial compressive load from one side of the spring pressure ring 2 is borne by the electron multiplier plate 5 and distributed over a large peripheral surface area. When a pulsed voltage is applied to the cathode of the small-halo vacuum photoelectric device, the oscillation amplitude of the electron multiplier plate 5 can be significantly reduced, attenuating the sound generated by the vibration of the electron multiplier plate 5 and thus preventing the observer from being exposed during nighttime reconnaissance, such as during nighttime reconnaissance.
[0050] The electron multiplier plate 5 is placed within the vacuum photoelectric device so that its conductive output surface 52 is electrically connected to the metallized third surface 33 of the second metal ring 3. This placement ensures that the electron multiplier plate 5 is securely fixed within the small halo vacuum photoelectric device and allows a voltage from an external power source to be applied to its conductive output surface 52 from outside the small halo vacuum photoelectric device. In this manner, the inner edge of the raised metal ring of the second metal ring 3 contacts the lateral surface of the electron multiplier plate 5, preventing the electron multiplier plate 5 from moving within its plane relative to the centerline of the small halo vacuum photoelectric device. A spring pressure ring 2 is placed in the gap between the second metal ring 3 and the electron multiplier plate 5, compressing the electron multiplier plate 5 so that its open edge closes at the cutout. If there are notches near the cutout on either side of the spring pressure ring 2, pliers are used to compress it, guiding its ends into the notches. After the metallized bevel 21 of the spring pressure ring 2 contacts the inner edge of the raised protrusion of the first metal ring 1, the compressed edge of the spring pressure ring 2 is released. At the same time, under the action of its elastic force, the elastic pressure ring 2 slides on the inner edge of the inclined surface 21 of the metal ring, and moves along the axis of the small halo vacuum photoelectric device toward the electron multiplier plate 5 and contacts it. The gap between the conductive surface 22 of the elastic pressure ring 2 and the electrical input surface 51 of the electron multiplier plate 5 is formed by metallizing the first contact surface 22 in the form of an outer cone, with its top located on the vertical axis of the elastic pressure ring and having a certain inclination angle. Compensation is performed from 89° to 86°. Therefore, the low-halo vacuum optoelectronic device provides planar contact between the elastic pressure ring 2 and the conductive input surface 51 of the electron multiplier plate 5, eliminating partial or complete electrical contact between the elastic pressure ring 2 and the electron multiplier plate 5 and its related surfaces, and eliminating the halo phenomenon caused by stray light generated by surface deformation of the electron multiplier plate 5.
[0051] The small halo vacuum photoelectric device has higher operating characteristics, wider application range and more reliable operation.
[0052] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.
Claims
1. A small halo vacuum photoelectric device, characterized in that: include: A first ceramic ring (6), a second ceramic ring (7), a first metal ring (1), a second metal ring (3), an elastic pressure ring (2), and an electron multiplier plate (5) having a conductive input surface and a conductive output surface; A first ceramic ring (6) is arranged on the bottom surface of the first metal ring (1); and a second metal ring (3) is arranged on the bottom surface of the first ceramic ring (6); The second metal ring (3) is arranged on the top surface of the second ceramic ring (7); An anode is provided on the bottom surface of the second ceramic ring (7); The second metal ring (3) comprises: a raised annular element, a metallized first surface (31), a metallized second surface (32) and a metallized third surface (33); The second surface (32) is in electrical contact with an external power supply component; The conductive output surface (52) of the electron multiplier plate (5) is electrically connected to the third surface (33), and radial displacement is limited by a raised annular element; the raised height of the raised annular element is no greater than one third of the thickness of the electron multiplier plate (5); The first contact surface (22) of the elastic pressure ring (2) is an outer cone structure, the vertex of the first contact surface (22) is located on the vertical axis of the elastic pressure ring (2), and the bevel angle of the first contact surface (22) is When the angle is 89° to 86°, the metallized surface (22) of the elastic pressure ring (2) is completely adhered to the conductive input surface (51) of the electron multiplier plate (5).
2. The small halo vacuum photoelectric device according to claim 1, characterized in that: An inwardly protruding annular element is provided on the inner side wall of the lower portion of the ceramic ring (7).
3. The small halo vacuum photoelectric device according to claim 2, characterized in that: The diameter of the inwardly protruding circular ring of the second ceramic ring (7) is no greater than the diameter of the working surface of the electron multiplier plate (5), and the height of the inwardly protruding boss is one third of the total height of the ceramic cylinder (7).
4. The small halo vacuum photoelectric device according to claim 1, characterized in that: An inclined surface (21) is provided on the inner side wall of the elastic pressure ring (2); the contact surface between the first metal ring (1) and the inclined surface (21) is electrically conductive; and the metallized surface (22) of the elastic pressure ring (2) and the conductive input surface (51) of the electron multiplier plate 5 are electrically conductive.
5. The small halo vacuum photoelectric device according to claim 1, characterized in that: The outer diameter of the elastic pressure ring (2) is larger than the minimum inner diameter of the first metal ring (1); Circular holes or semicircular holes are provided near the slits on both sides of the elastic pressure ring (2); The first metal ring (1) and the second metal ring (3) are dielectric rings made of metal material and having a metal coating.
6. The small halo vacuum photoelectric device according to claim 1, characterized in that: The first metal ring (1) is in the shape of a flat ring; the inclined surface (21) of the elastic pressure ring (2) is a metallized surface, and is used to form a linear contact with the second metallized surface (11) of the first metal ring (1); Preferably, the shape of the third surface (33) of the metal ring is flat; Preferably, the metallized third surface (33) and the annular raised surface (31) are in the shape of a circular ring.
7. The small halo vacuum photoelectric device according to claim 6, characterized in that: After assembly, the circular protrusion on the inner edge surface of the annular protruding surface (31) contacts the side surface of the electron multiplying plate (5).
8. The small halo vacuum photoelectric device according to claim 1, characterized in that: The elastic pressure ring (2), the first metal ring (1) and the second metal ring (3) are made of an alloy material of nickel, cobalt and iron.
9. The small halo vacuum photoelectric device according to claim 1, characterized in that: The conductive material of the conductive input surface (51) and the output surface (53) of the electron multiplier plate (5) is nickel-chromium alloy.
10. A low-light imaging device, characterized in that: include: The small halo vacuum photoelectric device according to any one of claims 1 to 9.