Patent ID: 6831787
Filing Date: 2004-12-14
Classification: G02B

Abstract:
A protected lenticular product comprising a lenticular substrate having an index of refraction NL, said substrate having a lenticular surface with a plurality of peaks and valleys forming a plurality of respective lenticule lenses, an optical medium on said lenticular surface, said medium having an index of refraction NC, and having a first surface facing toward an observation area, and a second opposite surface interfaced to said peaks and valleys, said observation area having an index of refraction NA, wherein NC is substantially less than NL, wherein said second surface of said optical medium is a mirror image of said lenticular surface and conforms to said peaks and valleys of said lenticular surface, and said first surface of said optical medium is planar, such that said optical medium has thin portions at said peaks of said lenticular surface and has thick portions filling said valleys of said lenticular surface, wherein said optical medium is an adhesive, and comprising a laminate layer having a first planar surface facing said observation area, and a second planar surface interfaced and adhered to said first surface of said optical medium provided by said adhesive, said first and second planar surfaces of said laminate layer being parallel to each other, and wherein light rays passing from said lenticular substrate into said adhesive are bent at an angle &thgr;1 at the interface thereof, light rays passing from said adhesive into said laminate layer are bent at an angle &thgr;2 at the interface thereof, and light rays passing from said laminate layer into said observation area are bent at an area &thgr;3 at the interface thereof, and wherein NC is substantially closer to NA than to NL, and wherein &thgr;1 is substantially greater than the difference between &thgr;3 and &thgr;2.