A portable, self-contained, electronic radioscopic imaging system uses an X-ray
converter screen for converting impinging X-ray radiation to visible light, and
thus each point impinged on the screen by X-ray radiation scintillates visible
light emissions diverging from the screen. An emission modification lens layer,
e.g., a prismatic brightness enhancement film or a sprayed on transmissive layer,
through which the visible light emitted from the screen is transmitted is superposed
with the screen for generally focusing the diverging visible light as a restricted
cone of illumination propagating outwardly from each point impinged on the screen
to increase the fraction of light directed into the collection cone and reducing
the amount of scattered visible light from the screen.
