| 摘要 |
The present invention provides a method of forming a lenticular sheet for use in forming a substantially ghost-free lenticular image. In a preferred embodiment, the method according to the invention includes providing a means for forming a lenticular sheet and forming the lenticular sheet out of a polymeric material using the means such that the lenticular sheet has an actual thickness (da) that is within about ±15% of an optimal thickness (do) as determined according to the formula: do=(ns-1)r/s(n-1), wherein n is the refractive index of the polymeric material, s is the number of interlaced scenes in the lenticular image, and r is the radius of the lenticles formed using the means. In another embodiment, the method according to the invention includes providing a means for forming a lenticular sheet and forming the lenticular sheet out of a polymeric material using the means such that the lenticles have an actual radius (ra) that is within about ±15% of the optimal radius (ro) determined according to the formula: ro=(n-1)sda/(ns-1), wherein n is the refractive index of a polymeric material from which the lenticular sheet is to be formed, s is the number of interlaced scenes in the lenticular image, and da is the predetermined actual thickness of the lenticular sheet. In yet another embodiment, the method according to the invention includes providing a means for forming a lenticular sheet and forming the lenticular sheet from a polymeric material using the means, wherein the polymeric material has an actual refractive index (na) that is within ±3% of an optimal refractive index (no) as determined according to the formula: no=(ra-sda)/s(ra-da), wherein ra is the actual radius of each lenticle in the lenticular sheet, s is the number of interlaced scenes in the lenticular image, and da is the predetermined actual thickness of the lenticular sheet.
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