What is the function of the image intensifier input screen? In the previous article, we have generally introduced the inner liner of the image intensifier, so what parts are the image intensifier composed of? How do each of these parts work? Let’s take a look at it next.
The 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 enough strength to make it a vacuum device, aluminum or titanium with a small attenuation effect and weak scattering ability is generally used to make a board structure with a thickness of about 0.25mm-0.5mm.
Input scintillation crystal: Since the wavelength of X-rays is smaller than that of visible light, it cannot be directly imaged using CCD and other equipment, so the participation of scintillation crystals is required to convert X-rays into visible light. In order to ensure that the paths passed by the electrons remain the same value and avoid image intensifier deformation, the input scintillation crystals are generally curved.