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X ray image intensifier input scintillation crysta

X ray image intensifier input scintillation crystal: Because the wavelength of X ray is smaller than the wavelength of visible light, it is not possible to directly image it directly using devices such as CCD, so the participation of scintillation crystal is required to convert X ray into visible light. In order to ensure that the path through which electrons pass maintains the same value and avoids image distortion, the input scintillation crystal is generally curved.

X ray image intensifier photocathode: The scintillator excites visible light photons after receiving X-rays, and then the photoelectric factor releases photoelectrons through the photoelectric effect.X ray image intensifier is mainly composed of input screen, input scintillation crystal, photocathode, vacuum tube and focusing electrode, output scintillation crystal and output screen. Input screen: In order to ensure that the input screen has sufficient strength to make it into a vacuum device, it is generally made of aluminum or titanium with a small attenuation effect and its weak ability to scatter rays into a plate structure with a thickness of about 0.25mm-0.5mm.

x-ray-image-intensifier

The X ray image intensifier is usually cylindrical, and its inner liner is the core component of the X ray image intensifier. Its general working process is as follows. The input screen scintillation crystal sensitive to X ray converts its X ray non-visible light into visible light. Visible light photons are converted into an image that emits electrons under the photoelectric effect of the photocathode, that is, photoelectrons, which reach the output screen through accelerated focusing.

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  • A historical record of the development of image intensifiers:

 

Author:肖恩

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