Multilayer lenticular light polarizing device

Claim 1

A MULTILAYER LIGHT TRANSMITTING DEVICE FOR RECEIVING NORMALLY INCIDENT UNPOLARIZED COLLIMATED LIGHT AND PROVIDING A LARGE PROPORTION THEREOF IN THE FORM OF POLARIZED LIGHT, COMPRISING, IN ASSEMBLY BONDED RELATION, AN ISOTROPIC ENTRANCE LAYER HAVING A PLANE ENTERING SURFACE, A NEGATIVELY LENTICULATED EXIT SURFACE AND A GIVEN INDEX OF REFRACTION, AN ISOTROPIC EXIT LAYER SPACED FROM SAID ENTRANCE LAYER HAVING A POSITIVELY LENTICULATED ENTERING SURFACE, A PLANE EXIT SURFACE AND A GIVEN INDEX OF REFRACTION WHICH IS DIFFERENT FROM THAT OF SAID ENTRANCE LAYER, AND A BIREFRINGEMENT LAYER POSITIONED INTERMEDIATELY OF AND BONDED TO FACING SURFACES TO SAID ENTRANCE AND EXIT LAYERS, SAID BIREFRINGEMENT LAYER HAVING A POSITIVELY LENTICULATED ENTERING SURFACE BONDED TO SAID NEGATIVELY LENTICULATED EXIT SURFACE OF SAID ENTRNCE LAYER, NEGATIVELY LENTICULATED EXIT SURFACE BONDED TO SAID POSITIVELY LENTICULATED ENTERING SURFACE OF SAID EXIT LAYER, AND GIVEN RELATIVELY LOW AND HIGH INDICES OF REFRACTION EACH SUBSTANTAILLY MATCHING A SEPARATE ONE OF THE INDICES OF SAID ISOTROPIC LAYERS, THE LENTICULES OF SAID ENTRANCE AND EXIT LAYERS BEING ARRANGED IN LATERALLY OFFSET RELATION SO THAT, WHEN TAKEN IN THE GENERAL DIRECTION OF LIGHT TRANSMITTAL, THE VERTICES OF THE LENTICULES OF ONE LAYER ARE OPPOSITE THE LENTICULAR JOINING EXTREMITIES OF THE OTHER, THE ISTOTROPIC PROPERTY AND PLANE ENTERING SURFACE OF SAID ENTRANCE LAYER PROVIDING TRANSMISSION OF SAID NORMALLY INCIDENT COLLIMATED BEAMS THERETHROUGH WITHOUT DEVIATION, THE DOUBLY REFRACTIVE PROPERTY AND LENTICULAR STRUCTURE OF SID INTERMEDIATE BIREFRINGENT LAYER RESOLVING EACH ENTERING BEAM INTO "O" AND "E" COMPONENTS WITH THAT COMPONENT MATCHING THE INDEX OF SAID ENTRANCE LAYER PROPGATED IN A SUBSTANTIALLY UNALTERED DIRECTION THROUGH SAID BIREFRINGENT LAYER, THEN REFRACTED UPON ENTERING THE POSITIVELY LENTICULATED EXIT LAYER HAVING A DIFFERENT REFRACTIVE INDEX AND AGAIN REFRACTED UPON EMERGING FROM THE PLANAR EXIT SURFACE OF SAID EXIT LAYER TOWARD A GIVEN FOCAL PLANE, WHILE THAT COMPONENT MATCHING THE INDEX OF SAID EXIT LAYER IS REFRACTED IN SAID INTERMEDIATE BIREFRINGENT LAYER, IS PROPAGATED IN A SUBSTANTIALLY UNALTERED DIRECTION IN SAID EXIT LAYER, AND IS AGAIN REFRACTED UPON EMERGING FROM SAID EXIT LAYER TOWARD SID FOCAL PLANE, THE OFFSET RELATION OF THE LENTICULES OF THE RESPECTIVE LAYERS CONTRIBUTING TO THE PROPER FOCUS OF THE COMPONENTS.