A cleaning method for photocathode input window of low-light image intensifier
A low-light image intensifier and photocathode technology, which is applied in the directions of cleaning methods and utensils, chemical instruments and methods, etc., can solve the problems of long time consumption, low work efficiency, not suitable for mass production, etc., and achieves improved efficiency and cost. reduced effect
Active Publication Date: 2015-08-26
NORTH NIGHT VISION TECH
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Problems solved by technology
However, this method takes a long time, has low work efficiency and high cost, and is far from meeting the needs of mass production.
At the same time, due to the use of polishing powder, it also produces certain pollution to the environment.
Method used
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[0024] refer to figure 1 , 2 , 3, 4, the main technical scheme of the present invention is explained: the surface of low-light image intensifier photocathode glass input window 1 and fiber optic panel input window 2 is plasma cleaned, and its specific process flow is the same as above. The plasma cleaning machine is: GDR-10PR type, main parameters: frequency 13.56MHz, power 300W, available in the market; detergent: RBS-25 concentrated neutral detergent, available in the market; ultrasonic cleaning machine is: 1012S type, available in the market; fixed pad 3 (see Figure 4 ): An installation tool designed by itself according to the characteristics of plasma cleaning. Its structure is composed of stepped columns (3-2) arranged on the surface of the bottom plate (3-1) according to the outer diameter of the workpiece 4 (input window).
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The invention discloses a cleaning method for the photocathode input window of a low-light-level image intensifier. The cleaning method is mainly used for cleaning the surfaces of the photocathode glass input window and the optical fiber face plate input window of the low-light-level image intensifier. The invention adopts the main technical scheme that a plasma cleaning technique is adopted for cleaning the surface of the photocathode input window of the image intensifier, and the technological processes are as follows: washing liquid preparing, workpieces cleaning, workpiece flushing, ultrasonic cleaning, workpieces flushing again, workpieces spinning, workpieces installing, argon gas pressure regulating, plasma cleaning, termination procedures and inspection. After the adoption of the invention, tests show that the research purpose is achieved completely, and the defects of low work efficiency, high cost, influences to environment and the like in the original method can be overcame fundamentally. The quality of the photocathode is effectively ensured, the efficiency is increased, and the cleaning method completely meets the requirements of modern mass production of low-light-level image intensifiers.
Description
technical field [0001] The invention relates to a method for cleaning the surface of an optical glass and an optical fiber panel used for an electric vacuum device, and is mainly used for cleaning the surface of a multi-alkali photocathode glass input window of a low-light image intensifier and an input window of an optical fiber panel. Can also be used for surface cleaning of similar photocathode input windows. Background technique [0002] Vacuum optoelectronic devices represented by low-light image intensifiers are widely used in national defense, scientific research and other industries, and are widely valued at home and abroad. low-light image intensifier (see figure 1 ), mainly composed of cathode input window, photocathode, cone electrode or microchannel plate, fluorescent screen, anode output window and other components. Its working principle: Under low illumination at night, the image of the scene that cannot be directly seen by the human eye is converted into a c...
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IPC IPC(8): B08B7/04
Inventor 李晓峰
Owner NORTH NIGHT VISION TECH