CN217768282U

CN217768282U - Photoelectric cathode film layer manufacturing device of infrared enhanced cathode assembly

Info

Publication number: CN217768282U
Application number: CN202221493290.4U
Authority: CN
Inventors: 张彦云; 李廷涛; 李磊; 高兵祥; 钟梓源; 李家保; 许有毅; 崔万兵; 杨锦邦; 阿永发
Original assignee: North Night Vision Technology Co Ltd
Current assignee: North Night Vision Technology Co Ltd
Priority date: 2022-06-15
Filing date: 2022-06-15
Publication date: 2022-11-08
Anticipated expiration: 2032-06-15

Abstract

The utility model discloses a photoelectric cathode film layer manufacturing device of an infrared enhanced cathode assembly, which comprises a glass window, a cap, an outer cover A and an outer cover B, wherein the outer cover A and the outer cover B, the outer cover B and the cap and the outer cover A and an antimony alkali seat are connected by screws; the cap is provided with an observation hole, and the glass window is placed on the observation hole; 4 photoelectric cathode manufacturing stations are arranged around the observation hole, a positioning column is arranged beside each station, and when a photoelectric cathode film layer is manufactured, the assembly is placed on the photoelectric cathode manufacturing stations and is positioned through the positioning columns; the thermocouple locating pin is located in the middle of the two photoelectric cathode manufacturing stations. The assembled shield was fixed to an antimony base and a thermocouple was inserted to monitor the temperature in the shield in real time. The process key node can not be judged by observing the color change of the surface of the component during manufacturing, and can be judged by observing the color change of a glass window placed on an observation hole, so that the quality of the photoelectric cathode film layer is ensured.

Description

Photoelectric cathode film layer manufacturing device of infrared enhanced cathode assembly

Technical Field

The utility model relates to an infrared intensifier field, concretely relates to photocathode rete making devices of infrared reinforcing negative pole subassembly.

Background

Vacuum optoelectronic devices represented by the super-second generation image intensifier are widely applied in the industries of national defense, scientific research and the like, and are generally regarded as important at home and abroad.

The super-second generation image intensifier mainly comprises a photocathode input window, a multi-alkali photocathode, a microchannel plate, a fluorescent screen, an anode output window, a high-voltage power supply and other parts. The working principle is as follows: in the low-light environment at night, weak light from a target which can not be seen by human eyes is gathered on a photocathode of an image intensifier, an optical image is converted into a corresponding electronic image through a multi-alkali photocathode, the electronic image is amplified and intensified through a microchannel plate, then is accelerated through anode high voltage, bombards a fluorescent screen, is converted into an optical image with enough brightness, and finally is output through an anode output window.

In recent years, with the continuous progress of technology, the cathode sensitivity of the super-second generation image intensifier exceeds 1000 muA/lm, the application range of the super-second generation image intensifier is greatly expanded by improving the sensitivity, and a new direction is provided for the development of the super-second generation image intensifier. Research shows that the super-second generation image intensifier using the infrared intensified cathode component does not improve the infrared response efficiency of the multi-alkali photocathode by increasing the thickness of a photocathode film layer. This is because, after the cathode thickness is increased, electrons excited by short wavelengths may not escape from the surface during the migration toward the surface of the cathode film layer, thereby causing a decrease in the cathode integral sensitivity. The infrared enhanced cathode component is used for prolonging the optical path of photons in the photocathode, namely, the photons incident on the photocathode are not vertically incident, so that the incident light is deflected, and the aim of improving the sensitivity of the image enhancer is fulfilled. The existing manufacturing process of the photoelectric cathode film layer needs to judge the key nodes of the process by observing the surface color change (caused by the increase of the film layer thickness) of a cathode input window in the process of the process. Since the infrared enhanced cathode assembly can present different colors when seen from different directions on the surface of the infrared enhanced cathode assembly before the photoelectric cathode is manufactured, the method for judging the process key nodes by observing the color change on the surface of the infrared enhanced cathode assembly in the manufacturing process of the photoelectric cathode film layer cannot be realized, and the film layer quality of the photoelectric cathode cannot be ensured. Therefore, a device for manufacturing a photocathode film layer suitable for an infrared enhanced cathode assembly needs to be designed to ensure the film layer quality of the photocathode.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome above-mentioned not enough, provide a photocathode rete making devices of infrared reinforcing negative pole subassembly.

The utility model adopts the technical proposal that:

a manufacturing device for a photocathode film layer of an infrared enhanced cathode assembly comprises a glass window, a cap, an outer cover A, an outer cover B, a pin, a screw, a positioning rod, a thermocouple positioning pin and an antimony base seat.

The top surface of the cap is non-planar, an observation hole is formed in the center of the cap, 4 photocathode manufacturing stations and 4 positioning rods which are 90 degrees mutually are arranged around the observation hole, 2 positioning rods are arranged on the outer edge of each photocathode manufacturing station, and 1 thermocouple positioning pin is arranged in the middle of each 2 photocathode manufacturing stations.

The glass window is placed on an observation hole in the center of the cap cover through 4 positioning rods.

Two screw holes which are 180 degrees are arranged above the stibium base seat, and two bayonets which are 180 degrees are arranged above the outer cover A and the upper side and the lower side of the outer cover B.

The operation steps during connection comprise:

(1) The screw hole on the upper part of the outer cover A is aligned with the bayonet on the lower part of the outer cover B and then is fixedly connected with the bayonet through two M3 screws;

(2) A bayonet on the upper part of the outer cover B is aligned with a screw hole on the lower part of the cap cover and then is fixedly connected with the screw hole through two M3 screws;

(3) The bayonet at the lower part of the outer cover A is aligned with the screw hole at the upper part of the stibine base and then is fixedly connected with the screw hole through two M3 screws.

Preferably, the material of the glass window is the same as that of the cathode input window of the common super-second generation image intensifier.

Preferably, the device material needs to have good plasticity, good heat resistance, low expansion and the like.

Preferably, the cap, the outer cover A and the outer cover B are made of kovar alloy, and the thickness of the kovar alloy is 0.8mm.

Preferably, the pin, the positioning rod and the thermocouple positioning pin are welded on the cap cover by adopting gold-nickel welding flux.

Preferably, the top surface of the cap is non-planar, the center of the cap is provided with an observation hole, the glass window is placed on the observation hole, and when the multi-alkali photocathode film is manufactured, the key process nodes are judged by observing the color change of the surface of the glass window, so that the quality of the photocathode film is ensured.

Preferably, there are 4 photocathode preparation stations that each other is 90 around the cap observation hole, there is a reference column next to each station, and when making the photocathode rete, infrared reinforcing negative pole subassembly is placed on photocathode preparation station to pass through the reference column location.

Preferably, a thermocouple positioning pin is arranged between the two photocathode manufacturing stations of the cap, and a thermocouple on photocathode manufacturing equipment must be inserted into the thermocouple positioning pin during manufacturing of a photocathode film layer so as to monitor temperature change in the technological process in real time.

Preferably, the outer cover A and the outer cover B are fixedly connected through two screws M3; the outer cover B is fixedly connected with the cap through two M3 screws; the outer cover A and the stibine base are fixedly connected through two M3 bolts.

The beneficial effects of the utility model are that:

the temperature in the shield can be monitored in real time by fixing the assembled shield to an antimony base and inserting a thermocouple. The key process node can be judged by observing the color change of the glass window placed on the observation hole, and the quality of the photoelectric cathode film layer is ensured.

Drawings

Fig. 1 is a schematic structural view of the device for manufacturing a photocathode film layer of an infrared enhanced cathode assembly of the present invention.

Figure 2 is a schematic view of a glazing.

Fig. 3 is a schematic view of the cap arrangement (with the top half being a front view and the bottom half being a top view).

Fig. 4 is a schematic view of the outer cover a (the upper half is a front view, and the lower half is a top view).

Fig. 5 is a schematic view of the outer cover B (the upper half is a front view, and the lower half is a top view).

FIG. 6 is a schematic view of an antimony base.

Wherein, 1-glass window; 2-a cap; 3-housing A; 4-housing B; 5-a pin; 6-screw; 7-positioning the rod; 8-thermocouple locating pins; 9-antimony base.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

Example (b):

as shown in fig. 1-6, the device for manufacturing a photocathode film layer of an infrared-enhanced cathode assembly comprises a glass window 1, a cap 2, an outer cover A3, an outer cover B4, a pin 5, a screw 6, a positioning rod 7, a thermocouple positioning pin 8 and an antimony base seat 9.

The top surface of the cap 2 is a non-plane, an observation hole is arranged in the center of the cap 2, 4 photocathode manufacturing stations and 4 positioning rods 7 which are 90 degrees mutually are arranged around the observation hole, 2 positioning rods 7 are arranged on the outer edge of each photocathode manufacturing station, and 1 thermocouple positioning pin 8 is arranged in the middle of each 2 photocathode manufacturing stations.

The glass window 1 is placed on an observation hole in the center of the cap 2 through 4 positioning rods 7, two screw holes which are 180 degrees are formed in the positions below the cap 2 and above the outer cover A3 and above the stibine base 9, and two bayonets which are 180 degrees are formed in the positions above the outer cover A3 and the upper side and the lower side of the outer cover B4.

During connection, a screw hole on the upper part of the outer cover A3 is aligned with a bayonet on the lower part of the outer cover B4 and then is fixedly connected with the bayonet through two screws 6 of the M3; then, a bayonet on the upper part of the outer cover B4 is aligned with a screw hole on the lower part of the cap 2 and then is fixedly connected with the screw hole through two M3 screws 6; and finally, aligning the bayonet at the lower part of the outer cover A3 with the screw hole at the upper part of the stibine base 9 and then fixedly connecting the bayonet with the screw hole through two M3 screws 6.

According to actual needs, the top surface of the cap 2 is non-planar, an observation hole is formed in the center of the cap, the glass window 1 is placed on the observation hole, 4 photoelectric cathode manufacturing stations which are 90 degrees to each other are arranged around the observation hole, a positioning column is arranged beside each station, and when a photoelectric cathode film layer is manufactured, the infrared enhanced cathode assembly is placed on the photoelectric cathode manufacturing stations and is positioned through the positioning columns.

The outer cover A3 and the outer cover B4 are fixedly connected through two screws 6 of the M3.

The outer cover B4 is fixedly connected with the cap 2 through two screws 6 of the M3.

The outer cover A3 and the stibine base 9 are fixedly connected through two screws 6 of the M3.

Claims

1. The utility model provides a photocathode rete making devices of infrared reinforcing negative pole subassembly which characterized in that: comprises a glass window (1), a cap (2), an outer cover A (3), an outer cover B (4), a pin (5), a screw (6), a positioning rod (7), a thermocouple positioning pin (8) and an antimony base seat (9);

the top surface of the cap (2) is non-planar, an observation hole is formed in the center of the cap (2), 4 photoelectric cathode manufacturing stations which are 90 degrees to each other and 4 positioning rods (7) are arranged around the observation hole, 2 positioning rods (7) are further arranged on the outer edge of each photoelectric cathode manufacturing station, and 1 thermocouple positioning pin (8) is arranged in the middle of each 2 photoelectric cathode manufacturing stations; the glass window (1) is placed on an observation hole in the center of the cap (2) through 4 positioning rods (7), two screw holes which are 180 degrees are formed in the positions below the cap (2) and the pin (5) above the outer cover A (3) and above the stibium base seat (9), and two bayonets which are 180 degrees are formed in the positions above the outer cover A (3) and the upper side and the lower side of the outer cover B (4); in a connection state, a screw hole above the outer cover A (3) is aligned with a bayonet below the outer cover B (4) and then fixedly connected with the bayonet through two M3 screws (6), a bayonet above the outer cover B (4) is aligned with a screw hole below the cap (2) and then fixedly connected with the bayonet through two M3 screws (6), and a bayonet below the outer cover A (3) is aligned with a screw hole above the stibine base (9) and then fixedly connected with the bayonet through two M3 screws (6);

the outer cover A (3) is fixedly connected with the outer cover B (4) through two M3 screws (6); the outer cover B (4) is fixedly connected with the cap (2) through two M3 screws (6); the outer cover A (3) is fixedly connected with the stibine base (9) through two M3 bolts (6).

2. The apparatus for forming a photocathode film layer of an ir-enhanced cathode assembly according to claim 1, wherein: the top surface of the cap (2) is non-planar, an observation hole is formed in the center of the cap, and the glass window (1) is placed on the observation hole.

3. The apparatus for forming a photocathode film layer of an ir-enhanced cathode assembly according to claim 1, wherein: the pin (5), the positioning rod (7) and the thermocouple positioning pin (8) are welded on the cap (2) by adopting gold-nickel solder.

4. The apparatus for forming a photocathode film layer of an infrared-enhanced cathode assembly as claimed in any one of claims 1 to 3, wherein: the stibium base seat (9) fixes the photoelectric cathode film layer manufacturing device in cathode manufacturing equipment.