Making method of three-generation image enhancer using gallium arsenide photocathode
A technology of photocathode and image intensifier, which is applied in the field of electric vacuum, can solve the problems of easily producing unqualified products, difficult to completely remove air, and low production efficiency of products, so as to improve the qualified rate of products, reduce the probability of chemical reactions, eliminate The effect of gas process shortening
Inactive Publication Date: 2009-06-10
JILIN DONGYA YESHI
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Problems solved by technology
[0005] 1. This method requires very low atmospheric pressure in the ultra-high vacuum chamber, which is lower than 10 -11 Pascal can work normally, therefore, the time required for the degassing process of the vacuum chamber is long, resulting in low product production efficiency;
[0006] 2. With this method, the air in the vacuum chamber is not easy to be completely removed. When the indoor temperature is increased, the remaining oxygen molecules, oxygen-containing gas and water vapor will chemically react with the surface of the photocathode, and unqualified products are likely to be produced.
According to statistics, using this method, the product qualification rate is usually only 30%.
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[0022] In order to have a further understanding of the present invention, the method described in the present invention will be described in detail below in conjunction with the accompanying drawings.
[0023] The specific implementation of the method of the present invention comprises the following steps:
[0024] Step 1: Before producing image intensifier products, replace the ultra-high vacuum chambers 2, 3, 5, 6, 7, 8 and unloading gate chamber 9 in the working room with inert gas (such as argon, helium, etc.) air, and make the atmospheric pressure in these ultra-high vacuum chambers and the lock chamber 9 not higher than a predetermined value;
[0025] Step 2: Send the phosphor screen assembly into the phosphor screen assembly loading gate chamber 1, and then pass inert gas into the gate chamber to replace the air; when the atmospheric pressure in the gate chamber is not higher than the predetermined value, open the gate and send the phosphor screen assembly to into the ...
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The invention relates to a producing method of a three-generation image intensifier, air in each work room is replaced by inert gas, when an atmospheric pressure of each work room is not higher than a predetermined value, producing and machining of the image intensifier are performed. With a technic scheme in the invention, not only production efficiency can be improved, but also product qualification ratio can be largely increased.
Description
technical field [0001] The invention relates to the field of electric vacuum technology, in particular to a method for manufacturing an image intensifier in a night vision system. Background technique [0002] The third-generation image intensifier using gallium arsenide photocathode is the preferred core imaging device in the current night vision system. The quality of the product directly determines the overall performance of the night vision system, and improving the quality of the product through special production methods has become the focus of many researchers. [0003] The production method of the commonly used third-generation image intensifier is: regularly send the fluorescent screen assembly into the ultra-high vacuum chamber through the loading gate chamber, carry out airtight degassing and electron bombardment cleaning, and then send it into the assembly ultra-high vacuum chamber; Gallium (Gallium) photocathode assembly is sent into the ultra-high vacuum chamb...
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IPC IPC(8): H01J9/00
Inventor 张少辉贾欣志田金生辛福学卡玛良-俄迪科卡玛良-谢尔盖卡玛良－俄迪科卡玛良－谢尔盖
Owner JILIN DONGYA YESHI