Abstract A rear projection viewer employing a rearwardly inclined viewing screen having a lenticulated element for transmitting projected images substantially uniformly over a given viewing zone which is directed downwardly from an axis normal to the screen in partial compensation for its angle of inclination. The screen includes a forwardly positioned lenticular lens and a rearwardly positioned Fresnel lens having a rear planar surface of fine grain surface roughness which lightly diffuses the projected image and additionally provides a suitable surface for image focusing. Preferably, the rear projection viewer is intended for use with color additive film of the type in which an array of parallel color stripes is employed, and the periodicity of appropriate lenticular elements is related to the periodicity of the film stripes to reduce moire between the two and thereby minimize color bands in the viewed image. Specifically, a plurality of the lenticular elements, arranged in parallel relation to the projected image of the film stripes, are provided in an numerical ratio of small intefers thereto, such as a ratio of 3 to 2.
In a projection system including photographic film of the type having a recorded image formed at least in part by a repetitive series of image forming segments arranged in a regular array, the improvement comprising a screen configured for projection of such recorded images thereto, said screen having a plurality of lenticular elements arranged in a regular array, and said plurality of elements provided in a 1:1 or larger ratio of small integers to the projected images of such image forming segments.
Claim 2
Dependent Claim
82 words
In a projection system including photographic film of the type having a recorded image formed at least in part by a repetitive series of image forming segments arranged in a regular array, the improvement comprising a screen configured for projection of such recorded images thereto, said screen having a plurality of lenticular elements arranged in a regular array, and said plurality of elements provided in a 1:1 or larger ratio of small integers to the projected images of such image forming segments.
Claim 3
Dependent Claim
17 words
The system of claim 1 wherein said ratio is of integers at least as small as 5.
Claim 4
Dependent Claim
36 words
The system of claim 1 wherein such film segments are parallel stripes and said lenticular elements are contiguous rib-like lenticular elements having their longitudinal axis disposed in parallel relation to the projected images of such stripes.
Claim 5
Dependent Claim
20 words
The system of claim 3 wherein said ratio of small integers is of integers at least as small as 3.
Claim 6
Dependent Claim
34 words
The system of claim 1 wherein such film segements are parallel stripes, said lenticular elements are arranged in parallel relation to the projected images of such stripes and said ratio is 3 to 2.
Claim 7
Dependent Claim
52 words
The system of claim 1 wherein such image forming segments are color stripes arranged in substantially parallel relation in a repetitive sequence to produce a colored image and said lenticular elements are substantially contiguous rib-like lenticular elements having their longitudinal axes disposed in parallel relation to the projected images of such stripes.