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What is the image resolution of the image intensifier?

The image intensifier is the most critical component in the image intensified TV system, and its technical performance has a great impact on the work and image quality of the whole machine. The main technical parameters of the image intensifier include: incident field of view, output image diameter, image resolution, image contrast, X-ray absorptivity, conversion coefficient, etc., as well as technical parameters such as vacuum, signal-to-noise ratio, noise ratio and gray level . The output image diameter represents the image diameter of the effective input field of view on the output screen under the specified electrode voltage (usually 15mm, 20mm, 30mm). When the tube voltage is 45kV and the tube current is 0.1mA, the input screen of the image intensifier should be placed at a distance of 1m from the center of the tube, and heavy metals should not be placed in front of the input screen line, and The resolution test card is composed of different gaps. Observe the number of black and white line pairs that can be clearly seen within 1 cm in the output image. The number of line pairs measured in this way is called the image resolution. At present, the resolution of image intensifiers can reach 25-50 line pairs/cm or more.
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Author:肖恩


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