Abstract: A rear projection screen is provided for observing an image by introducing light from the rear side of the screen at a sharp angle. The screen has a plane of incidence which comprises a plurality of prisms extending in lines or arcs. Each prism has a total reflection surface which totally reflects incident light so that the light emerges toward an observer and a surface opposite to the total reflection surface, and toward the total reflection surface and/or the opposite surface having a curved surface so that the luminous flux of the totally reflected light is once converged and is then diffused.

Abstract: Provided is a rear projection screen onto which light from a projector is introduced at an angle from about 40 to 70 deg. with respect to the rear light incidence surface of the screen. A plurality of elongated prisms are formed on the rear surface of the screen, extending along curved lines, each prism having a reflection surface extending along the associated curved line, thereby the light received by the rear surface is internally reflected by the reflection surface, and transmitted through the light transmitting medium of the screen and is then emerged from the front viewing surface thereof.

Abstract: Provided is a rear projection screen having a front surface receiving light rays from a projector and a viewing surface formed with a lenticulated surface in which lenticules each consisting of a crest, troughs and flanks interconnecting the crest and trough are continuously laid. The flank surface is provided with, on at least a part thereof, a total reflecting surface on which all light rays impinging thereto are reflected and then emanate from the crest through a medium interface thereof. Further, a concave surface is provided in each crest portion.

Abstract: Provided is a rear projection screen having a front surface receiving light rays from a projector and a viewing surface formed with a lenticulated surface in which lenticules each consisting of a crest, a trough and a flank interconnecting the crest and trough are continuously laid. The flank surface is provided with, on at least a part thereof, a total reflecting surface on which all light rays impinging thereto are reflected and then emanate from the crest through a medium interface thereof.