A low-background reflection scanning image changer tube and its manufacturing method
A technology of reflective scanning and image transformation tubes, which is applied in the direction of image conversion/image enlargement tubes, image/graphic display tubes, screen tubes, etc., and can solve problems such as reduced resolution, interference, and increased background noise of scanning image transformation tubes.
Active Publication Date: 2021-11-19
NORTH NIGHT VISION TECH
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Problems solved by technology
After the optical signal passes through the photocathode, photoelectrons are generated as useful signals. The unabsorbed optical signal is irradiated to the grid plate at the rear, and is reflected by the grid plate to the photocathode to generate interference electrons, causing the background noise of the scanning image converter to be greatly increased. Increase, resolution decrease, etc.
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[0026] Specific embodiments of the present invention will be described below in conjunction with the accompanying drawings.
[0027] Such as figure 1 , a low-background reflective scanning image converter of the present invention, which is mainly composed of a photocathode 1, a grid plate 2, a focusing system 3, a deflection plate 4 and a fluorescent screen 5 arranged in sequence along the axial direction.
[0028] The photocathode 1 is parallel to the grid plate and is made on the surface of the base window covering the strip-shaped (strip-shaped) metal film shading diaphragm. The base window is made of materials such as quartz, AVG, and glass that transmit visible light and ultraviolet light. The (strip-shaped) metal film shading diaphragm is plated outside the effective area of the photocathode, and the photocathode is sealed to the scanning image converter through an indium-tin alloy at a high temperature of 70-200°C.
[0029] Described grid plate 2 is a circular square...
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Abstract
The invention discloses a method for manufacturing a low-reflection scanning image transformation tube, which is mainly used for the production of a visible light scanning image transformation tube. The photocathode, grid plate, focusing electrode group, deflection plate and fluorescent screen in the scanning image transformation tube are arranged axially. After the optical signal passes through the photocathode, photoelectrons are generated as useful signals. The unabsorbed optical signal is irradiated to the grid plate at the rear, and is reflected by the grid plate to the photocathode to generate interference electrons, resulting in a large background noise of the scanning image converter. problems such as increase and decrease in resolution. By reducing the reflection of the grid plate, the background noise of the image changing tube can be reduced, and the resolution performance of the scanning image changing tube can be improved.
Description
technical field [0001] The invention relates to a low-reflection scanning image transformation tube and a manufacturing method thereof, and is mainly used for reducing stray light in a cavity of a visible light scanning image transformation tube. Background technique [0002] Scanning image changer tube (abbreviation: scan tube), also known as stripe image changer tube (abbreviation: stripe tube), is a kind of optical diagnostic equipment with picosecond or even sub-picosecond level time resolution and tens of micron level spatial resolution. [0003] In addition to measuring the spatial distribution of light pulses, the scanning image converter can also record the time information of light pulses. Corresponding to different photocathodes, the testable wavelength ranges from ultraviolet light, visible light, to X-rays, and has a wide range of applications in ultrafast research fields such as nuclear explosions, plasma physics, laser fusion, biology, and photochemistry. In l...
Claims
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IPC IPC(8): H01J29/70H01J31/12H01J31/50
CPCH01J29/70H01J31/12H01J31/50
Inventor 张昆林冯云祥张世超杨文波邓华兵谭何盛靳英坤刀丽纯
Owner NORTH NIGHT VISION TECH