Aging image intensifiers experience deterioration in resolution, resulting in fuzzier and less sharp images.
As an image intensifier ages with use, the component of image quality that deteriorates is resolution. Resolution is the ability to distinguish two separate points or objects as distinct, which is crucial for image quality. Over time, components within the image intensifier may wear down or become damaged, leading to a reduction in resolution. This deterioration can result in images appearing more fuzzy and less sharp. Factors that affect resolution include the wavelength of light used and the numerical aperture of a lens. With a higher numerical aperture, a lens can gather more light, thus improving resolution.