image tube
noun
an electron tube that receives a pattern of radiation, as infrared, ultraviolet, or x-ray, on a photosensitive surface and reproduces the pattern on a fluorescent screen.
Also called
im·age-con·vert·er tube
[im-ij-kuh n-vur-ter] /ˈɪm ɪdʒ kənˌvɜr tər/.
Origin of image tube
First recorded in 1935–40