ghost image

== English == === Etymology 1 === From ghost (noun sense 3, via noun sense 4). ==== Noun ==== ghost image (plural ghost images) (photography) Any undesired image appearing at the image plane of an optical system; either a false image of the desired object, or an out-of-focus image of a bright source of light in the field of the optical system. ===== Translations ===== === Etymology 2 === After the Norton Ghost disk-cloning and backup software tool, itself an initialism of general hardware-oriented system transfer. ==== Noun ==== ghost image (plural ghost images) (computing) A copy of all the contents of a hard drive, used as a backup.