Overly pedantic into   A layman reading this so that when an imaging system a camera or an eye is placed in the reconstructed beam an image of the object will be seen even when the object is no longer present  sounds kind of ridiculous esp the will be seen even when the object is no longer present part  Photography could be described the same way to a bushman perhaps  Its like defining an automobile as a metal box that you sit in and after turning a key and moving some controls around you get out and you are in a different place that you were before