GHOST IMAGES

A new type of optical imaging is described, which has undoubted advantages in certain applications in comparison with traditional optical methods. The use of nonlinear optical quantum processes makes it possible to obtain entangled photon pairs rigidly correlated in space and time in the course of spontaneous parametric three-photon scattering and counter-propagating four-photon mixing. This correlation can be used to construct ghost images. A fiber-optic version of the formation of phantom images is also described, which is suitable for the study of hard-to-reach cavities and organs of the human body, which allow the introduction of a thin fiber-optic bundle.