The image intensifier is composed of an intensifier tube, a tube container, a power supply, an optical system and a support part. Its main part is an image intensifier tube, which has an input screen (receiving X-ray radiation to generate electron flow) and an output screen (receiving electron bombardment to emit light), which enables the former to enhance images with thousands of times the brightness to be imaged on the output screen. The reinforced tube is a vacuum tube made of glass. For the purpose of protection, a tube container is needed. This tube container also plays a role in shielding X-rays, shielding external electromagnetic fields, and protecting the human body from high pressure damage.
The diameter of the image intensifier is usually 4 inches, 6 inches, 9 inches, 12 inches, etc. The input screen diameter of the image intensifier ranges from 4 inches to 16 inches. The intensifier with a small input screen is more flexible and cheaper to operate. A larger intensifier is more expensive and inflexible to operate, but it can provide a larger field of view and image magnification opportunities.