Patent ID: 6574047
Filing Date: 2003-06-03
Classification: B29D,G02B

Abstract:
A method of selectively illuminating an image of a set of images formed on an image bearing layer of a lenticular image comprising the steps of:providing an array of line illumination sources; projecting light from said array of line illumination sources through a linear array of cylinder lenses; wherein said array of line illumination sources are at a back focal plane of said linear array of cylinder lenses and at an identical vertical position relative to a central axis of each of said cylinder lenses to effectively produce a plane illumination source at an infinity; projecting light from said illumination sources through a lenticule side of said lenticular image; passing said light through lenticules on said lenticular image such that rays of said illumination source emanate from a point located at a viewing distance of said lenticular image; locating said illumination source such that an angle formed by a ray from said illumination source relative to a line located at a center of said lenticular image and normal to an image plane corresponds to a correct viewing angle of a first image; wherein said source of illumination is a line source parallel to a longitudinal axes of said lenticules; and changing said vertical position of each line illumination source of said array of line illumination sources at said back focal plane of each cylinder lens of said array of cylinder lenses relative to said center axis of each of said cylinder lens to change said angle of illumination transmitted by said cylinder lens thereby generating said viewing angles of said set of images.