Input screen of X-ray image intensifier

Image intensifier tube is an important part of image intensifier. The image intensifier tube is a large glass tube with a black coating as a light sealing layer. The image intensifier tube maintains a high vacuum state.

The input screen is coated with a layer of phosphor, the thicker the phosphor layer, the stronger the brightness, but because of the scattering and reflection of the phosphor, the resolution decreases; on the contrary, the thinner the phosphor layer, the higher the resolution, but the brightness also decreases. So in recent years, cesium iodide phosphor has been used as the fluorescent layer in the new enhanced tube. Because cesium iodide phosphor has more absorption, high fluorescence efficiency and image resolution, and it can match the photoelectric cathode spectrum.

Author:Yevette