The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 27, 2004
Filed:
Jun. 13, 2001
Anna Catherine Andrews, Medina, OH (US);
Ferro Corporation, Cleveland, OH (US);
Abstract
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 (d ) that is within about ±15% of an optimal thickness (d ) as determined according to the formula: d =(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 (r ) that is within about ±15% of the optimal radius (r ) determined according to the formula: r =(n−1)sd /(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 d 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 (n ) that is within ±3% of an optimal refractive index (n ) as determined according to the formula: n =(r −sd )/s(r −d ), wherein r is the actual radius of each lenticle in the lenticular sheet, s is the number of interlaced scenes in the lenticular image, and d is the predetermined actual thickness of the lenticular sheet.